{"id":2,"date":"2021-08-04T19:03:33","date_gmt":"2021-08-04T19:03:33","guid":{"rendered":"https:\/\/sciences.ucf.edu\/physics\/talat\/?page_id=2"},"modified":"2024-05-02T14:20:53","modified_gmt":"2024-05-02T18:20:53","slug":"sample-page","status":"publish","type":"page","link":"https:\/\/sciences.ucf.edu\/physics\/rahman-group\/","title":{"rendered":""},"content":{"rendered":"\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-9d6595d7 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:20%\"><div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full is-resized\"><img decoding=\"async\" width=\"288\" height=\"414\" data-src=\"https:\/\/sciences.ucf.edu\/physics\/rahman-group\/wp-content\/uploads\/sites\/2\/sites\/40\/2021\/12\/Talat-Rahman-e1638905082180.jpg\" alt=\"Talat S Rahman\" class=\"wp-image-37 lazyload\" style=\"--smush-placeholder-width: 288px; --smush-placeholder-aspect-ratio: 288\/414;width:216px;height:311px\" data-srcset=\"https:\/\/sciences.ucf.edu\/physics\/rahman-group\/wp-content\/uploads\/sites\/40\/2021\/12\/Talat-Rahman-e1638905082180.jpg 288w, https:\/\/sciences.ucf.edu\/physics\/rahman-group\/wp-content\/uploads\/sites\/40\/2021\/12\/Talat-Rahman-e1638905082180-209x300.jpg 209w\" data-sizes=\"(max-width: 288px) 100vw, 288px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" \/><\/figure>\n<\/div><\/div>\n\n\n\n<div class=\"wp-block-column is-vertically-aligned-center is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:66.66%\">\n<h1 class=\"wp-block-heading\"><strong>Talat S. Rahman<\/strong><\/h1>\n\n\n\n<p class=\"has-medium-font-size\">UCF Trustee Chair Professor and Pegasus Professor<br><a href=\"https:\/\/sciences.ucf.edu\/physics\/\" target=\"_blank\" rel=\"noreferrer noopener\">Department of Physics<\/a><br><a href=\"https:\/\/ucf.edu\/\">University of Central Florida<\/a><\/p>\n<\/div>\n<\/div>\n\n\n\n<div class=\"wp-block-getwid-tabs\" data-active-tab=\"0\"><ul class=\"wp-block-getwid-tabs__nav-links\"><\/ul>\n<div class=\"wp-block-getwid-tabs__nav-link\"><span class=\"wp-block-getwid-tabs__title-wrapper\"><a href=\"#\"><span class=\"wp-block-getwid-tabs__title\">Research Interests<\/span><\/a><\/span><\/div><div class=\"wp-block-getwid-tabs__tab-content-wrapper\"><div class=\"wp-block-getwid-tabs__tab-content\">\n<ul class=\"wp-block-list\" id=\"block-42cf6cbf-9c3f-4ba2-8ab4-71603e24955f\">\n<li>Multi-scale modeling of chemical reactions and related phenomena at surfaces<\/li>\n\n\n\n<li>Understanding processes that control growth and morphological evolution of thin films<\/li>\n\n\n\n<li>Theory and modeling of vibrational, optical and magnetic properties of nanomaterials<\/li>\n\n\n\n<li>Predictive modeling of functional two-dimensional transition metal dichalcogenides<\/li>\n\n\n\n<li>Surface coordination chemistry: novel functionality via substrate charge transfer and oxidation state<\/li>\n\n\n\n<li>Understanding the response of surfaces and nanostructures to ultrafast external fields<\/li>\n\n\n\n<li>Development of techniques beyond density functional theory for strongly correlated material<\/li>\n\n\n\n<li>Development of techniques suitable for non-equilibrium phenomena and non-adiabatic processes<\/li>\n<\/ul>\n<\/div><\/div>\n\n\n\n<div class=\"wp-block-getwid-tabs__nav-link\"><span class=\"wp-block-getwid-tabs__title-wrapper\"><a href=\"#\"><span class=\"wp-block-getwid-tabs__title\">Selected Publications<\/span><\/a><\/span><\/div><div class=\"wp-block-getwid-tabs__tab-content-wrapper\"><div class=\"wp-block-getwid-tabs__tab-content\">\n        <div class=\"wp-block-getwid-post-carousel custom-post-type-post has-arrows-outside has-dots-outside\">\n            <div data-slider-option=\"{&quot;sliderSlidesToShowDesktop&quot;:&quot;1&quot;,&quot;getwid_slidesToShowLaptop&quot;:&quot;1&quot;,&quot;getwid_slidesToShowTablet&quot;:&quot;1&quot;,&quot;getwid_slidesToShowMobile&quot;:&quot;1&quot;,&quot;getwid_autoplay_speed&quot;:6000,&quot;getwid_animation_speed&quot;:800,&quot;getwid_slidesToScroll&quot;:&quot;1&quot;,&quot;getwid_autoplay&quot;:true,&quot;getwid_pause_on_hover&quot;:false,&quot;getwid_infinite&quot;:true,&quot;getwid_center_mode&quot;:false,&quot;getwid_arrows&quot;:&quot;outside&quot;,&quot;getwid_dots&quot;:&quot;outside&quot;}\" class=\"wp-block-getwid-post-carousel__wrapper\">\n                \t\t\t\t\t\t\t<div class=\"wp-block-getwid-post-carousel__slide\">\n\t\t\t\t\t\t\t\t\n<h3 class=\"wp-block-getwid-template-post-title\"><a class=\"wp-block-getwid-template-post-title__link\" href=\"https:\/\/sciences.ucf.edu\/physics\/rahman-group\/schunke-et-al-2024\/\">Increased Selectivity in Photolytic Activation of Nanoassemblies Compared to Thermal Activation in On-Surface Ullmann Coupling<\/a><\/h3>\n\n\n\n\n<div class=\"wp-block-getwid-template-post-content is-full\" >\n<p><\/p>\n\n\n<div class=\"wp-block-image\">\n<figure data-wp-context=\"{&quot;imageId&quot;:&quot;69d1dc2ca2ed0&quot;}\" data-wp-interactive=\"core\/image\" data-wp-key=\"69d1dc2ca2ed0\" class=\"aligncenter size-full is-resized wp-lightbox-container\"><img decoding=\"async\" width=\"997\" height=\"448\" data-wp-class--hide=\"state.isContentHidden\" data-wp-class--show=\"state.isContentVisible\" data-wp-init=\"callbacks.setButtonStyles\" data-wp-on--click=\"actions.showLightbox\" data-wp-on--load=\"callbacks.setButtonStyles\" data-wp-on-window--resize=\"callbacks.setButtonStyles\" data-src=\"https:\/\/sciences.ucf.edu\/physics\/rahman-group\/wp-content\/uploads\/sites\/40\/2024\/05\/images_large_nn3c11509_0010.jpeg\" alt=\"\" class=\"wp-image-278 lazyload\" style=\"--smush-placeholder-width: 997px; --smush-placeholder-aspect-ratio: 997\/448;width:auto;height:300px\" data-srcset=\"https:\/\/sciences.ucf.edu\/physics\/rahman-group\/wp-content\/uploads\/sites\/40\/2024\/05\/images_large_nn3c11509_0010.jpeg 997w, https:\/\/sciences.ucf.edu\/physics\/rahman-group\/wp-content\/uploads\/sites\/40\/2024\/05\/images_large_nn3c11509_0010-300x135.jpeg 300w, https:\/\/sciences.ucf.edu\/physics\/rahman-group\/wp-content\/uploads\/sites\/40\/2024\/05\/images_large_nn3c11509_0010-768x345.jpeg 768w\" data-sizes=\"(max-width: 997px) 100vw, 997px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" \/><button\n\t\t\tclass=\"lightbox-trigger\"\n\t\t\ttype=\"button\"\n\t\t\taria-haspopup=\"dialog\"\n\t\t\taria-label=\"Enlarge\"\n\t\t\tdata-wp-init=\"callbacks.initTriggerButton\"\n\t\t\tdata-wp-on--click=\"actions.showLightbox\"\n\t\t\tdata-wp-style--right=\"state.imageButtonRight\"\n\t\t\tdata-wp-style--top=\"state.imageButtonTop\"\n\t\t>\n\t\t\t<svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"12\" height=\"12\" fill=\"none\" viewBox=\"0 0 12 12\">\n\t\t\t\t<path fill=\"#fff\" d=\"M2 0a2 2 0 0 0-2 2v2h1.5V2a.5.5 0 0 1 .5-.5h2V0H2Zm2 10.5H2a.5.5 0 0 1-.5-.5V8H0v2a2 2 0 0 0 2 2h2v-1.5ZM8 12v-1.5h2a.5.5 0 0 0 .5-.5V8H12v2a2 2 0 0 1-2 2H8Zm2-12a2 2 0 0 1 2 2v2h-1.5V2a.5.5 0 0 0-.5-.5H8V0h2Z\" \/>\n\t\t\t<\/svg>\n\t\t<\/button><\/figure>\n<\/div>\n\n\n<p><\/p>\n\n\n\n<p>On-surface synthesis is a powerful method that has emerged recently to fabricate a large variety of atomically precise nanomaterials on surfaces based on polymerization. It is very successful for thermally activated reactions within the framework of heterogeneous catalysis. As a result, it often lacks selectivity. We propose to use selective activation of specific bonds as a crucial ingredient to synthesize desired molecules with high selectivity. In this approach, thermally nonaccessible products are expected to arise in photolytically activated on-surface reactions with high selectivity. We demonstrate for assembled 2,2\u2032-dibromo biphenyl clusters on Cu(111) that the thermal and photolytic activations yield distinctly different products, combining submolecular resolution of individual product molecules in real-space imaging by scanning tunneling microscopy with chemical identification in X-ray photoelectron spectroscopy and supported by ab initio calculations. The photolytically activated Ullmann coupling of 2,2\u2032-dibromo biphenyl is highly selective, with only one identified product. It starkly contrasts the thermal reaction, which yields various products because alternate pathways are activated at the reaction temperature. Our study extends on-surface synthesis to a directed formation of thermally inaccessible products by direct bond activation. It promises tailored reactions of nanomaterials within the framework of on-surface synthesis based on the photolytic activation of specific bonds.<\/p>\n\n\n\n<p>This work was published in ACS Nano.<br>[C. Schunke, P. Schweer, E. Engelage, D. Austin, E. D. Switzer,\u00a0<strong>T. S. Rahman<\/strong>, K. Morgenstern, \u201cIncreased Selectivity in Photolytic Activation of Nanoassemblies Compared to Thermal Activation in On-Surface Ullmann Coupling.&#8221; ACS Nano (2024). <a href=\"https:\/\/doi.org\/10.1021\/acsnano.3c11509\">https:\/\/doi.org\/10.1021\/acsnano.3c11509<\/a>]<\/p>\n<\/div>\n\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"wp-block-getwid-post-carousel__slide\">\n\t\t\t\t\t\t\t\t\n<h3 class=\"wp-block-getwid-template-post-title\"><a class=\"wp-block-getwid-template-post-title__link\" href=\"https:\/\/sciences.ucf.edu\/physics\/rahman-group\/jiang-et-al-2024\/\">Breaking Continuously Packed Bimetallic Sites to Singly Dispersed on Nonmetallic Support for Efficient Hydrogen Production<\/a><\/h3>\n\n\n\n\n<div class=\"wp-block-getwid-template-post-content is-full\" >\n<p><\/p>\n\n\n<div class=\"wp-block-image\">\n<figure data-wp-context=\"{&quot;imageId&quot;:&quot;69d1dc2ca3a7f&quot;}\" data-wp-interactive=\"core\/image\" data-wp-key=\"69d1dc2ca3a7f\" class=\"aligncenter size-full is-resized wp-lightbox-container\"><img decoding=\"async\" width=\"677\" height=\"558\" data-wp-class--hide=\"state.isContentHidden\" data-wp-class--show=\"state.isContentVisible\" data-wp-init=\"callbacks.setButtonStyles\" data-wp-on--click=\"actions.showLightbox\" data-wp-on--load=\"callbacks.setButtonStyles\" data-wp-on-window--resize=\"callbacks.setButtonStyles\" data-src=\"https:\/\/sciences.ucf.edu\/physics\/rahman-group\/wp-content\/uploads\/sites\/40\/2024\/05\/images_large_am3c18160_0013.jpeg\" alt=\"Graphs displaying chemical conversion versus reaction temperature, alongside molecular models and a chemical equation for the reaction of glycol to co2 and h2, highlighting different catalyst compositions.\" class=\"wp-image-290 lazyload\" style=\"--smush-placeholder-width: 677px; --smush-placeholder-aspect-ratio: 677\/558;width:auto;height:300px\" data-srcset=\"https:\/\/sciences.ucf.edu\/physics\/rahman-group\/wp-content\/uploads\/sites\/40\/2024\/05\/images_large_am3c18160_0013.jpeg 677w, https:\/\/sciences.ucf.edu\/physics\/rahman-group\/wp-content\/uploads\/sites\/40\/2024\/05\/images_large_am3c18160_0013-300x247.jpeg 300w\" data-sizes=\"(max-width: 677px) 100vw, 677px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" \/><button\n\t\t\tclass=\"lightbox-trigger\"\n\t\t\ttype=\"button\"\n\t\t\taria-haspopup=\"dialog\"\n\t\t\taria-label=\"Enlarge\"\n\t\t\tdata-wp-init=\"callbacks.initTriggerButton\"\n\t\t\tdata-wp-on--click=\"actions.showLightbox\"\n\t\t\tdata-wp-style--right=\"state.imageButtonRight\"\n\t\t\tdata-wp-style--top=\"state.imageButtonTop\"\n\t\t>\n\t\t\t<svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"12\" height=\"12\" fill=\"none\" viewBox=\"0 0 12 12\">\n\t\t\t\t<path fill=\"#fff\" d=\"M2 0a2 2 0 0 0-2 2v2h1.5V2a.5.5 0 0 1 .5-.5h2V0H2Zm2 10.5H2a.5.5 0 0 1-.5-.5V8H0v2a2 2 0 0 0 2 2h2v-1.5ZM8 12v-1.5h2a.5.5 0 0 0 .5-.5V8H12v2a2 2 0 0 1-2 2H8Zm2-12a2 2 0 0 1 2 2v2h-1.5V2a.5.5 0 0 0-.5-.5H8V0h2Z\" \/>\n\t\t\t<\/svg>\n\t\t<\/button><\/figure>\n<\/div>\n\n\n<p><\/p>\n\n\n\n<p><\/p>\n\n\n\n<p>We have synthesized Pt<sub>1<\/sub>Zn<sub>3<\/sub>\/ZnO, also termed 0.01 wt %Pt\/ZnO-O<sub>2<\/sub>\u2013H<sub>2<\/sub>, as a catalyst containing singly dispersed single-atom bimetallic sites, also called a catalyst of singly dispersed bimetallic sites or a catalyst of isolated single-atom bimetallic sites. Its catalytic activity in partial oxidation of methanol to hydrogen at 290 \u00b0C is found to be 2\u20133 orders of magnitude higher than that of Pt\u2013Zn bimetallic nanoparticles supported on ZnO, 5.0 wt %Pt\/ZnO-N<sub>2<\/sub>\u2013H<sub>2<\/sub>. Selectivity for H<sub>2<\/sub>\u00a0on Pt<sub>1<\/sub>Zn<sub>3<\/sub>\/ZnO reaches 96%\u2013100% at 290\u2013330 \u00b0C, arising from the uniform coordination environment of single-atom Pt<sub>1<\/sub>\u00a0in singly dispersed single-atom bimetallic sites, Pt<sub>1<\/sub>Zn<sub>3<\/sub>\u00a0on 0.01 wt %Pt\/ZnO-O<sub>2<\/sub>\u2013H<sub>2<\/sub>, which is sharply different from various coordination environments of Pt atoms in coexisting Pt<sub><em>x<\/em><\/sub>Zn<sub><em>y<\/em><\/sub>\u00a0(<em>x<\/em>\u00a0\u2265 0,\u00a0<em>y<\/em>\u00a0\u2265 0) sites on Pt\u2013Zn bimetallic nanoparticles. Computational simulations attribute the extraordinary catalytic performance of Pt<sub>1<\/sub>Zn<sub>3<\/sub>\/ZnO to the stronger adsorption of methanol and the lower activation barriers in O\u2013H dissociation of CH<sub>3<\/sub>OH, C\u2013H dissociations of CH<sub>2<\/sub>O to CO, and coupling of intermediate CO with atomic oxygen to form CO<sub>2<\/sub>\u00a0on Pt<sub>1<\/sub>Zn<sub>3<\/sub>\/ZnO as compared to those on Pt\u2013Zn bimetallic nanoparticles. It demonstrates that anchoring uniform,\u00a0<em>isolated single-atom bimetallic sites<\/em>, also called\u00a0<em>singly dispersed bimetallic sites<\/em>\u00a0on a nonmetallic support can create new catalysts for certain types of reactions with much higher activity and selectivity in contrast to bimetallic nanoparticle catalysts with coexisting, various metallic sites M<sub><em>x<\/em><\/sub>A<sub><em>y<\/em><\/sub>\u00a0(<em>x<\/em>\u00a0\u2265 0,\u00a0<em>y<\/em>\u00a0\u2265 0). As these single-atom bimetallic sites are cationic and anchored on a nonmetallic support, the catalyst of singly dispersed single-atom bimetallic sites is different from a single-atom alloy nanoparticle catalyst. The critical role of the 0.01 wt %Pt in the extraordinary catalytic performance calls on fundamental studies of the profound role of a trace amount of a metal in heterogeneous catalysis.<\/p>\n\n\n\n<p>This work was published in ACS Applied Materials &amp; Interfaces. <br>[T. Jiang, Y. Li, Y. Tang, S. Zhang, D. Le,\u00a0<strong>T. S. Rahman<\/strong>, F. Tao, \u201cBreaking Continuously Packed Bimetallic Sites to Singly Dispersed on Nonmetallic Support for Efficient Hydrogen Production.\u201d ACS Appl. Mater. Interfaces, 16, 21757 (2024). <a href=\"https:\/\/doi.org\/10.1021\/acsami.3c18160\">https:\/\/doi.org\/10.1021\/acsami.3c18160<\/a>] <\/p>\n<\/div>\n\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"wp-block-getwid-post-carousel__slide\">\n\t\t\t\t\t\t\t\t\n<h3 class=\"wp-block-getwid-template-post-title\"><a class=\"wp-block-getwid-template-post-title__link\" href=\"https:\/\/sciences.ucf.edu\/physics\/rahman-group\/yu-et-al-2024\/\">Anomalous isotope effect on the optical bandgap in a monolayer transition metal dichalcogenide semiconductor<\/a><\/h3>\n\n\n\n\n<div class=\"wp-block-getwid-template-post-content is-full\" >\n<p><\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large is-resized\"><img decoding=\"async\" width=\"1024\" height=\"585\" data-src=\"https:\/\/sciences.ucf.edu\/physics\/rahman-group\/wp-content\/uploads\/sites\/40\/2024\/05\/sciadv.adj0758-f1-1024x585.jpg\" alt=\"Scientific collage displaying mos2 monolayer characterization: optical image (a), raman spectra graph (b), photoluminescence mapping (c-f) with silicon and molybdenum distributions.\" class=\"wp-image-304 lazyload\" style=\"--smush-placeholder-width: 1024px; --smush-placeholder-aspect-ratio: 1024\/585;width:auto;height:300px\" data-srcset=\"https:\/\/sciences.ucf.edu\/physics\/rahman-group\/wp-content\/uploads\/sites\/40\/2024\/05\/sciadv.adj0758-f1-1024x585.jpg 1024w, https:\/\/sciences.ucf.edu\/physics\/rahman-group\/wp-content\/uploads\/sites\/40\/2024\/05\/sciadv.adj0758-f1-300x172.jpg 300w, https:\/\/sciences.ucf.edu\/physics\/rahman-group\/wp-content\/uploads\/sites\/40\/2024\/05\/sciadv.adj0758-f1-768x439.jpg 768w, https:\/\/sciences.ucf.edu\/physics\/rahman-group\/wp-content\/uploads\/sites\/40\/2024\/05\/sciadv.adj0758-f1-1536x878.jpg 1536w, https:\/\/sciences.ucf.edu\/physics\/rahman-group\/wp-content\/uploads\/sites\/40\/2024\/05\/sciadv.adj0758-f1-2048x1171.jpg 2048w\" data-sizes=\"(max-width: 1024px) 100vw, 1024px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" \/><\/figure>\n<\/div>\n\n\n<p><\/p>\n\n\n\n<p>Isotope effects have received increasing attention in materials science and engineering because altering isotopes directly affects phonons, which can affect both thermal properties and optoelectronic properties of conventional semiconductors. However, how isotopic mass affects the optoelectronic properties in 2D semiconductors remains unclear because of measurement uncertainties resulting from sample heterogeneities. Here, we report an anomalous optical bandgap energy red shift of 13 (\u00b17) milli\u2013electron volts as mass of Mo isotopes is increased in laterally structured\u00a0<sup>100<\/sup>MoS<sub>2<\/sub>&#8211;<sup>92<\/sup>MoS<sub>2<\/sub>\u00a0monolayers grown by a two-step chemical vapor deposition that mitigates the effects of heterogeneities. This trend, which is opposite to that observed in conventional semiconductors, is explained by many-body perturbation and time-dependent density functional theories that reveal unusually large exciton binding energy renormalizations exceeding the ground-state renormalization energy due to strong coupling between confined excitons and phonons. The isotope effect on the optical bandgap reported here provides perspective on the important role of exciton-phonon coupling in the physical properties of two-dimensional materials.<\/p>\n\n\n\n<p>This work was published in Science Advances. <br>[Y. Yu, V. Turkowski, J. A. Hachtel, A. A. Puretzky, A. V. Ievlev, N. U. Din, S. B. Harris, V. Iyer, C. M. Rouleau,\u00a0<strong>T. S. Rahman<\/strong>, D. B. Geohegan, K. Xiao, \u201cAnomalous isotope effect on the optical bandgap in a monolayer transition metal dichalcogenide semiconductor.\u201d Sci. Adv. 10, eadj0758 (2024).\u00a0<a href=\"https:\/\/doi.org\/10.1126\/sciadv.adj0758\">https:\/\/doi.org\/10.1126\/sciadv.adj0758<\/a>]<\/p>\n<\/div>\n\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"wp-block-getwid-post-carousel__slide\">\n\t\t\t\t\t\t\t\t\n<h3 class=\"wp-block-getwid-template-post-title\"><a class=\"wp-block-getwid-template-post-title__link\" href=\"https:\/\/sciences.ucf.edu\/physics\/rahman-group\/switzer-et-al-2023\/\">Mapping spin interactions from conductance peak splitting in Coulomb blockade<\/a><\/h3>\n\n\n\n\n<div class=\"wp-block-getwid-template-post-content is-full\" >\n<p><\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full is-resized\"><img decoding=\"async\" width=\"500\" height=\"397\" data-src=\"https:\/\/sciences.ucf.edu\/physics\/rahman-group\/wp-content\/uploads\/sites\/40\/2024\/05\/medium.png\" alt=\"\" class=\"wp-image-308 lazyload\" style=\"--smush-placeholder-width: 500px; --smush-placeholder-aspect-ratio: 500\/397;width:auto;height:300px\" data-srcset=\"https:\/\/sciences.ucf.edu\/physics\/rahman-group\/wp-content\/uploads\/sites\/40\/2024\/05\/medium.png 500w, https:\/\/sciences.ucf.edu\/physics\/rahman-group\/wp-content\/uploads\/sites\/40\/2024\/05\/medium-300x238.png 300w\" data-sizes=\"(max-width: 500px) 100vw, 500px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" \/><\/figure>\n<\/div>\n\n\n<p><\/p>\n\n\n\n<p>We investigate the transport properties of a quantum dot coupled to leads interacting with a multispin system using the generalized master equation\u00a0within the Coulomb blockade regime. We find that if two states for each scattering region electron manifold are included, several signatures of the interacting spin system appear in steady-state transport properties. We provide a theoretical mapping of differential conductance peak signatures and all spin Hamiltonian parameters related to the inclusion of excited state transitions between uncharged and charged electron manifolds. Our predictions describe a scheme of only using a quantum dot and differential conductance to measure magnetic anisotropy, interspin exchange coupling, exchange coupling between the spin system and itinerant electron, and applied magnetic field response.<br><br>This work was published in Physical Review B.<br>[E. D. Switzer, X.-G. Zhang, V. Turkowski,\u00a0<strong>T. S. Rahman<\/strong>, \u201cMapping spin interactions from conductance peak splitting in Coulomb blockade.\u201d Phys. Rev. B. 108, 174438 (2023).\u00a0<a href=\"https:\/\/doi.org\/10.1103\/PhysRevB.108.174438\">https:\/\/doi.org\/10.1103\/PhysRevB.108.174438<\/a>]<\/p>\n<\/div>\n\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"wp-block-getwid-post-carousel__slide\">\n\t\t\t\t\t\t\t\t\n<h3 class=\"wp-block-getwid-template-post-title\"><a class=\"wp-block-getwid-template-post-title__link\" href=\"https:\/\/sciences.ucf.edu\/physics\/rahman-group\/ortigoza-et-al-2023\/\">A closer look at how symmetry constraints and the spin\u2013orbit coupling shape the electronic structure of Bi (111)<\/a><\/h3>\n\n\n\n\n<div class=\"wp-block-getwid-template-post-content is-full\" >\n<p><\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large is-resized\"><img decoding=\"async\" width=\"789\" height=\"1024\" data-src=\"https:\/\/sciences.ucf.edu\/physics\/rahman-group\/wp-content\/uploads\/sites\/40\/2024\/05\/cmacfb67f1_hr-789x1024.jpg\" alt=\"Illustration of a trigonal crystal system with labeled axes and hydrogen atoms (h1 to h6) connected by bonds, showing angles and distances.\" class=\"wp-image-315 lazyload\" style=\"--smush-placeholder-width: 789px; --smush-placeholder-aspect-ratio: 789\/1024;width:auto;height:300px\" data-srcset=\"https:\/\/sciences.ucf.edu\/physics\/rahman-group\/wp-content\/uploads\/sites\/40\/2024\/05\/cmacfb67f1_hr-789x1024.jpg 789w, https:\/\/sciences.ucf.edu\/physics\/rahman-group\/wp-content\/uploads\/sites\/40\/2024\/05\/cmacfb67f1_hr-231x300.jpg 231w, https:\/\/sciences.ucf.edu\/physics\/rahman-group\/wp-content\/uploads\/sites\/40\/2024\/05\/cmacfb67f1_hr-768x997.jpg 768w, https:\/\/sciences.ucf.edu\/physics\/rahman-group\/wp-content\/uploads\/sites\/40\/2024\/05\/cmacfb67f1_hr.jpg 1025w\" data-sizes=\"(max-width: 789px) 100vw, 789px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" \/><\/figure>\n<\/div>\n\n\n<p><\/p>\n\n\n\n<p>Fully relativistic density-functional-theory calculations of Bi(111) thin films are analyzed to revisit their two metallic surface-states branches. We first contrast these metallic branches with surface states arising at gaps in the valence band opened by the spin\u2013orbit coupling (SOC). We find that the two metallic branches along\u00a0\u0393\ud835\udc40\u2015\u00a0do not overlap with the bulk band at the zone boundary,\u00a0<em>M<\/em>. We show that the spin texture observed in such states cannot be traced to the lifting of Kramers&#8217; degeneracy. Instead, we track them to the\u00a0\ud835\udc5a\ud835\udc57=\u00b11\/2\u2013\ud835\udc5a\ud835\udc57=\u00b13\/2\u00a0SOC splitting, the potential anisotropy for in-plane and out-of-plane states, and the coupling between the opposite surfaces of a slab occurring near\u00a0<em>M<\/em>, which is driven by a spatial redistribution of the four metallic states composing the two metallic branches. Each of these branches appears to be non-degenerate at the tested surface, yet each is degenerate with another state of opposite spin at the other surface. Nevertheless, the four metallic states bear some contribution on both surfaces of the film because of their spatial redistribution near\u00a0<em>M<\/em>. The overlapping among these states near\u00a0<em>M<\/em>, afforded by their spatial redistribution on both surfaces, causes a hybridization that perpetuates the splitting between the two branches, makes the film&#8217;s electronic structure thickness dependent near\u00a0<em>M<\/em>, extinguishes the magnetic moment of the metallic states avoiding the magnetic-moment discontinuity at\u00a0<em>M<\/em>, and denies the need or expectancy of the metallic branches becoming degenerate at\u00a0<em>M<\/em>. We propose that the\u00a0<em>opposite<\/em>\u00a0spin polarization observed for the two metallic branches occurs because the surface atoms retain their covalent bonds and thus cannot afford magnetic polarization. We show that the Rashba-splitting of the metallic states for inversion-asymmetric films does not have a fixed magnitude but can be tuned by changing the perturbation breaking inversion symmetry.<br><br>This work was published in the Journal of Physics: Condensed Matter.<br>[M. Alc\u00e1ntara Ortigoza,\u00a0<strong>T. S. Rahman<\/strong>, \u201cA closer look at how symmetry constraints and the spin\u2013orbit coupling shape the electronic structure of Bi (111).\u201d J. Phys.: Condens. Matter 36, 015503 (2023).\u00a0<a href=\"https:\/\/doi.org\/10.1088\/1361-648x\/acfb67\">https:\/\/doi.org\/10.1088\/1361-648x\/acfb67<\/a>]<\/p>\n<\/div>\n\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"wp-block-getwid-post-carousel__slide\">\n\t\t\t\t\t\t\t\t\n<h3 class=\"wp-block-getwid-template-post-title\"><a class=\"wp-block-getwid-template-post-title__link\" href=\"https:\/\/sciences.ucf.edu\/physics\/rahman-group\/le-et-al-2021\/\">On\u00a0stabilizing\u00a0spin\u00a0crossover\u00a0molecule\u00a0[Fe(tBu2qsal)2]\u00a0on\u00a0suitable\u00a0supports:\u00a0insights\u00a0from\u00a0ab\u00a0initio\u00a0studies<\/a><\/h3>\n\n\n\n\n<div class=\"wp-block-getwid-template-post-content is-full\" >\n<p><\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full is-resized\"><img decoding=\"async\" width=\"797\" height=\"844\" data-src=\"https:\/\/sciences.ucf.edu\/physics\/rahman-group\/wp-content\/uploads\/sites\/40\/2024\/05\/cmac0bebf1_hr.jpg\" alt=\"3d molecular structure of an iron complex featuring iron (fe) atom in blue connected to surrounding nitrogen (n) and oxygen (o) atoms, displayed in a lattice-like configuration with stick bonds.\" class=\"wp-image-351 lazyload\" style=\"--smush-placeholder-width: 797px; --smush-placeholder-aspect-ratio: 797\/844;width:auto;height:300px\" data-srcset=\"https:\/\/sciences.ucf.edu\/physics\/rahman-group\/wp-content\/uploads\/sites\/40\/2024\/05\/cmac0bebf1_hr.jpg 797w, https:\/\/sciences.ucf.edu\/physics\/rahman-group\/wp-content\/uploads\/sites\/40\/2024\/05\/cmac0bebf1_hr-283x300.jpg 283w, https:\/\/sciences.ucf.edu\/physics\/rahman-group\/wp-content\/uploads\/sites\/40\/2024\/05\/cmac0bebf1_hr-768x813.jpg 768w\" data-sizes=\"(max-width: 797px) 100vw, 797px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" \/><\/figure>\n<\/div>\n\n\n<p><\/p>\n\n\n\n<p>Au(111) is one of the substrates often used for supporting spin crossover (SCO) molecules, partly because of its inertness and partly because it is conducting. Using density functional theory based calculations of [Fe(tBu<sub>2<\/sub>qsal)<sub>2<\/sub>] SCO molecules adsorbed on the Au(111) surface, we show that while Au(111) may not be a suitable support for the molecule, it may be so for a monolayer (ML) of molecules. While, physisorption of [Fe(tBu<sub>2<\/sub>qsal)<sub>2<\/sub>] on Au(111) leads to electron transfer from the highest occupied molecular orbital to the substrate, electron transfer is minimal for a ML of [Fe(tBu<sub>2<\/sub>qsal)<sub>2<\/sub>] on Au(111), causing only negligible changes in the electronic structure and magnetic moment of the molecules. Furthermore, a small difference in energy between the ferromagnetic and antiferromagnetic configurations of the molecules in the ML indicates a weak magnetic coupling between the molecules. These results suggest Au(111) as a plausible support for a ML of [Fe(tBu<sub>2<\/sub>qsal)<sub>2<\/sub>], making such a molecular assembly suitable for electronic and spin transport applications. As for [Fe(tBu<sub>2<\/sub>qsal)<sub>2<\/sub>] SCO molecules themselves, we find hexagonal boron nitride (<em>h<\/em>-BN) to be a viable support for them, as there is hardly any charge transfer, while graphene displays stronger interaction with the molecule (than\u00a0<em>h<\/em>-BN does) resulting in charge transfer from the molecule to graphene.<br><br>This work was published in <strong>\u00a0<\/strong>Journal\u00a0of\u00a0Physics:\u00a0Condensed\u00a0Matter.<br>[D.\u00a0Le,\u00a0T.\u00a0Jiang,\u00a0M.\u00a0Gakiya-Teruya,\u00a0M.\u00a0Shatruk,\u00a0and\u00a0<strong>T. S.\u00a0Rahman<\/strong>,<em>\u00a0&#8220;<\/em>On\u00a0stabilizing\u00a0spin\u00a0crossover\u00a0molecule\u00a0[Fe(tBu2qsal)2]\u00a0on\u00a0suitable\u00a0supports:\u00a0insights\u00a0from\u00a0ab\u00a0initio\u00a0studies,&#8221;<strong>\u00a0<\/strong>Journal\u00a0of\u00a0Physics:\u00a0Condensed\u00a0Matter\u00a033,\u00a0385201\u00a0(2021).\u00a0<a href=\"https:\/\/doi.org\/10.1088\/1361-648x\/ac0beb\">https:\/\/doi.org\/10.1088\/1361-648x\/ac0beb<\/a>]<\/p>\n<\/div>\n\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"wp-block-getwid-post-carousel__slide\">\n\t\t\t\t\t\t\t\t\n<h3 class=\"wp-block-getwid-template-post-title\"><a class=\"wp-block-getwid-template-post-title__link\" href=\"https:\/\/sciences.ucf.edu\/physics\/rahman-group\/gakiya-teruya-et-al-2021\/\">Asymmetric\u00a0Design\u00a0of\u00a0Spin-Crossover\u00a0Complexes\u00a0to\u00a0Increase\u00a0the\u00a0Volatility\u00a0for\u00a0Surface\u00a0Deposition<\/a><\/h3>\n\n\n\n\n<div class=\"wp-block-getwid-template-post-content is-full\" >\n<p><\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full is-resized\"><img decoding=\"async\" width=\"999\" height=\"541\" data-src=\"https:\/\/sciences.ucf.edu\/physics\/rahman-group\/wp-content\/uploads\/sites\/40\/2024\/05\/images_large_ja1c04598_0008.jpeg\" alt=\"\" class=\"wp-image-358 lazyload\" style=\"--smush-placeholder-width: 999px; --smush-placeholder-aspect-ratio: 999\/541;width:auto;height:300px\" data-srcset=\"https:\/\/sciences.ucf.edu\/physics\/rahman-group\/wp-content\/uploads\/sites\/40\/2024\/05\/images_large_ja1c04598_0008.jpeg 999w, https:\/\/sciences.ucf.edu\/physics\/rahman-group\/wp-content\/uploads\/sites\/40\/2024\/05\/images_large_ja1c04598_0008-300x162.jpeg 300w, https:\/\/sciences.ucf.edu\/physics\/rahman-group\/wp-content\/uploads\/sites\/40\/2024\/05\/images_large_ja1c04598_0008-768x416.jpeg 768w\" data-sizes=\"(max-width: 999px) 100vw, 999px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" \/><\/figure>\n<\/div>\n\n\n<p><\/p>\n\n\n\n<p>A mononuclear complex [Fe(<em>t<\/em>Bu<sub>2<\/sub>qsal)<sub>2<\/sub>] has been obtained by a reaction between an Fe(II) precursor salt and a tridentate ligand 2,4-di(<em>tert<\/em>-butyl)-6-((quinoline-8-ylimino)methyl)phenol (<em>t<\/em>Bu<sub>2<\/sub>qsalH) in the presence of triethylamine. The complex exhibits a hysteretic spin transition at 117 K upon cooling and 129 K upon warming, as well as light-induced excited spin-state trapping at lower temperatures. Although the strongly cooperative spin transition suggests substantial intermolecular interactions, the complex is readily sublimable, as evidenced by the growth of its single crystals by sublimation at 573 \u2192 373 K and \u223c10<sup>\u20133<\/sup>\u00a0mbar. This seemingly antagonistic behavior is explained by the asymmetric coordination environment, in which the\u00a0<em>t<\/em>Bu substituents and quinoline moieties appear on opposite sides of the complex. As a result, the structure is partitioned in well-defined layers separated by van der Waals interactions between the\u00a0<em>t<\/em>Bu groups, while the efficient cooperative interactions within the layer are provided by the quinoline-based moieties. The abrupt spin transition is preserved in a 20 nm thin film prepared by sublimation, as evidenced by abrupt and hysteretic changes in the dielectric properties in the temperature range comparable to the one around which the spin transition is observed for the bulk material. The changes in the dielectric response are in excellent agreement with differences in the dielectric tensor of the low-spin and high-spin crystal structures evaluated by density functional theory calculations. The substantially higher volatility of [Fe(<em>t<\/em>Bu<sub>2<\/sub>qsal)<sub>2<\/sub>], as compared to a similar complex without\u00a0<em>t<\/em>Bu substituents, suggests that asymmetric molecular shapes offer an efficient design strategy to achieve sublimable complexes with strongly cooperative spin transitions.<br><br>This work was published in Journal\u00a0of\u00a0the\u00a0American\u00a0Chemical\u00a0Society.<br>[M.\u00a0Gakiya-Teruya,\u00a0X.\u00a0Jiang,\u00a0D.\u00a0Le,\u00a0\u00d6.\u00a0\u00dcng\u00f6r,\u00a0A. J.\u00a0Durrani,\u00a0J. J.\u00a0Koptur-Palenchar,\u00a0J.\u00a0Jiang,\u00a0T.\u00a0Jiang,\u00a0M. W.\u00a0Meisel,\u00a0H.-P.\u00a0Cheng,\u00a0X.-G.\u00a0Zhang,\u00a0X.-X.\u00a0Zhang,\u00a0<strong>T. S.\u00a0Rahman<\/strong>,\u00a0A. F.\u00a0Hebard,\u00a0and\u00a0M.\u00a0Shatruk,\u00a0&#8220;Asymmetric\u00a0Design\u00a0of\u00a0Spin-Crossover\u00a0Complexes\u00a0to\u00a0Increase\u00a0the\u00a0Volatility\u00a0for\u00a0Surface\u00a0Deposition,&#8221;\u00a0Journal\u00a0of\u00a0the\u00a0American\u00a0Chemical\u00a0Society\u00a0143,\u00a014563-14572\u00a0(2021).\u00a0<a href=\"https:\/\/doi.org\/10.1021\/jacs.1c04598\">https:\/\/doi.org\/10.1021\/jacs.1c04598<\/a>]<\/p>\n<\/div>\n\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t            <\/div>\n        <\/div>\n        <\/div><\/div>\n<\/div>\n\n\n\n<p class=\"has-medium-font-size\"><strong>Group News<\/strong><\/p>\n\n\n<ul class=\"wp-block-latest-posts__list has-dates wp-block-latest-posts\"><li><div class=\"wp-block-latest-posts__featured-image alignleft\"><img decoding=\"async\" width=\"150\" height=\"150\" data-src=\"https:\/\/sciences.ucf.edu\/physics\/rahman-group\/wp-content\/uploads\/sites\/40\/2024\/05\/images_large_nn3c11509_0010-150x150.jpeg\" class=\"attachment-thumbnail size-thumbnail wp-post-image lazyload\" alt=\"Illustration showing molecular structures and their corresponding visual data in blue and green hues, indicating different energy states or reactions.\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 150px; --smush-placeholder-aspect-ratio: 150\/150;\" \/><\/div><a class=\"wp-block-latest-posts__post-title\" href=\"https:\/\/sciences.ucf.edu\/physics\/rahman-group\/achieve-schunke-et-al-2024\/\">New Publication: Increased Selectivity in Photolytic Activation of Nanoassemblies Compared to Thermal Activation in On-Surface Ullmann Coupling<\/a><time datetime=\"2024-04-25T12:00:00-04:00\" class=\"wp-block-latest-posts__post-date\">April 25, 2024<\/time><\/li>\n<li><div class=\"wp-block-latest-posts__featured-image alignleft\"><img decoding=\"async\" width=\"150\" height=\"150\" data-src=\"https:\/\/sciences.ucf.edu\/physics\/rahman-group\/wp-content\/uploads\/sites\/40\/2024\/05\/images_large_am3c18160_0013-150x150.jpeg\" class=\"attachment-thumbnail size-thumbnail wp-post-image lazyload\" alt=\"Graphs displaying chemical conversion versus reaction temperature, alongside molecular models and a chemical equation for the reaction of glycol to co2 and h2, highlighting different catalyst compositions.\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 150px; --smush-placeholder-aspect-ratio: 150\/150;\" \/><\/div><a class=\"wp-block-latest-posts__post-title\" href=\"https:\/\/sciences.ucf.edu\/physics\/rahman-group\/achieve-jiang-et-al-2024\/\">New Publication: Breaking Continuously Packed Bimetallic Sites to Singly Dispersed on Nonmetallic Support for Efficient Hydrogen Production<\/a><time datetime=\"2024-04-17T12:18:54-04:00\" class=\"wp-block-latest-posts__post-date\">April 17, 2024<\/time><\/li>\n<li><div class=\"wp-block-latest-posts__featured-image alignleft\"><img decoding=\"async\" width=\"150\" height=\"150\" data-src=\"https:\/\/sciences.ucf.edu\/physics\/rahman-group\/wp-content\/uploads\/sites\/40\/2024\/04\/1641690749dennis-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail wp-post-image lazyload\" alt=\"A clock tower framed by shadowed tree branches, captured in daylight against a clear sky.\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 150px; --smush-placeholder-aspect-ratio: 150\/150;\" \/><\/div><a class=\"wp-block-latest-posts__post-title\" href=\"https:\/\/sciences.ucf.edu\/physics\/rahman-group\/news-manybodyschool2024\/\">Three Group Members Selected for Advanced School on Many-Body Physics<\/a><time datetime=\"2024-03-19T12:00:00-04:00\" class=\"wp-block-latest-posts__post-date\">March 19, 2024<\/time><\/li>\n<li><div class=\"wp-block-latest-posts__featured-image alignleft\"><img decoding=\"async\" width=\"150\" height=\"150\" data-src=\"https:\/\/sciences.ucf.edu\/physics\/rahman-group\/wp-content\/uploads\/sites\/40\/2024\/05\/sciadv.adj0758-f1-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail wp-post-image lazyload\" alt=\"Scientific collage displaying mos2 monolayer characterization: optical image (a), raman spectra graph (b), photoluminescence mapping (c-f) with silicon and molybdenum distributions.\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 150px; --smush-placeholder-aspect-ratio: 150\/150;\" \/><\/div><a class=\"wp-block-latest-posts__post-title\" href=\"https:\/\/sciences.ucf.edu\/physics\/rahman-group\/achieve-yu-et-al-2024\/\">New Publication: Anomalous isotope effect on the optical bandgap in a monolayer transition metal dichalcogenide semiconductor<\/a><time datetime=\"2024-02-21T12:00:00-05:00\" class=\"wp-block-latest-posts__post-date\">February 21, 2024<\/time><\/li>\n<li><div class=\"wp-block-latest-posts__featured-image alignleft\"><img decoding=\"async\" width=\"150\" height=\"150\" data-src=\"https:\/\/sciences.ucf.edu\/physics\/rahman-group\/wp-content\/uploads\/sites\/40\/2024\/05\/medium-150x150.png\" class=\"attachment-thumbnail size-thumbnail wp-post-image lazyload\" alt=\"Diagram illustrating a quantum dot system with blue spheres, energy levels, and notation for various components like chemical potential, tunneling rates, and charging energy.\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 150px; --smush-placeholder-aspect-ratio: 150\/150;\" \/><\/div><a class=\"wp-block-latest-posts__post-title\" href=\"https:\/\/sciences.ucf.edu\/physics\/rahman-group\/achieve-switzer-et-al-2023\/\">New Publication: Mapping spin interactions from conductance peak splitting in Coulomb blockade<\/a><time datetime=\"2023-10-31T12:00:00-04:00\" class=\"wp-block-latest-posts__post-date\">October 31, 2023<\/time><\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"<p>Talat S. Rahman UCF Trustee Chair Professor and Pegasus ProfessorDepartment of PhysicsUniversity of Central Florida Group News<\/p>\n","protected":false},"author":3,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"open","template":"","meta":{"footnotes":"","_links_to":"","_links_to_target":""},"class_list":["post-2","page","type-page","status-publish"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.2 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Professor Talat S. Rahman<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/sciences.ucf.edu\/physics\/rahman-group\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Professor Talat S. Rahman\" \/>\n<meta property=\"og:description\" content=\"Talat S. Rahman UCF Trustee Chair Professor and Pegasus ProfessorDepartment of PhysicsUniversity of Central Florida Group News\" \/>\n<meta property=\"og:url\" content=\"https:\/\/sciences.ucf.edu\/physics\/rahman-group\/\" \/>\n<meta property=\"og:site_name\" content=\"Professor Talat S. 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