Faculty and Research

Physics Department

Dr. Chernyak received his PhD in Physics from Weizmann Institute of Science (Israel) in 1996. He spent one year (1996-1997) as a Research Associate in  the Departments of Electrical Engineering at Colorado State University (Fort Collins, Colorado, USA) and Texas Tech  University (Lubbock, Texas, USA). He joined UCF in 1999 where he is a Professor.

Publications

  1. O. Lopatiuk-Tirpak, W.V. Schoenfeld, L. Chernyak, F.X. Xiu, J.L. Liu, S. Jang, F. Ren, S.J. Pearton, A. Osinsky, P. Chow (2006) “Carrier concentration dependence of acceptor activation energy in p-type ZnO “Appl. Phys. Lett., 88, 202110 (3 pages).
  2. O. Lopatiuk, A. Osinsky, L. Chernyak (2006) “Minority carrier transport in ZnO and related materials, chapter in Zinc Oxide Bulk, Thin Films and Nanostructures, C. Jagadish and S. Pearton (Editors), Elsevier.
  3. O. Lopatiuk-Tirpak, L. Chernyak, F.X. Xiu, J.L. Liu, S. Jang, F. Ren, S.J. Pearton, K. Gartsman, Y. Feldman, A. Osinsky, P. Chow (2006) “Studies of Minority Carrier Diffusion Length Increase in p-type ZnO:Sb “J. Appl. Phys., 100, 086101 (3 pages).
  4. O. Lopatiuk-Tirpak, L. Chernyak, L.J. Mandalapu, Z. Yang, J.L. Liu, K. Gartsman, Y. Feldman, Z. Dashevsky (2006) “Influence of electron injection on the photoresponse of ZnO homojunction diodes” Appl. Phys. Lett., 89, 142114 (3 pages).
  5. O. Lopatiuk-Tirpak, L. Chernyak, B.A. Borisov et. al. (2007) “Electron irradiation-induced increase of minority carrier diffusion length, mobility, and lifetime in Mg-doped AlN/AlGaN short period superlattice”            Appl. Phys. Lett., 91, 182103 (3 pages).
  6. O. Lopatiuk-Tirpak, L. Chernyak, Wang YL, et al. (2007) “Doping level dependence of electron irradiation-induced minority carrier diffusion length increase in Mg-doped GaN” Appl. Phys. Lett., 91, 092197 (3 pages).
  7. O. Lopatiuk-Tirpak, L. Chernyak(2007) “Studies of minority carrier transport in ZnO Superlattices and Microstructures” 42, 201-205.
  8. O. Lopatiuk-Tirpak, G. Nootz, E. Flitsiyan, L. Chernyak, et al. (2007) “Influence of electron injection on the temporal response of ZnO homojunction photodiodes”         Appl. Phys. Lett., 91, 042115 (3 pages).
  9. Y.I. Alivov, U. Ozgur, X. Gu, C. Liu, Y. Moon, H. Morkoc, O. Lopatiuk, L. Chernyak, C.W. Litton (2007) “Hybrid II-VI and III-V compound double heterostructures and their properties” J. Electron. Materials, 36, 409-413.
  10. O. Lopatiuk-Tirpak, L. Chernyak, Y.L. Wang, et al. (2007) “Cathodoluminescence studies of carrier concentration dependence for the electron-irradiation effects in p-GaN” Appl. Phys. Lett., 90, 172111 (3 pages).
  11. O. Lopatiuk, L. Chernyak, Y. Feldman, et al. (2007) “Studies of electron trapping in GaN doped with carbon” Thin Solid Films, 515, 4365-436.
  12. O. Lupan, L. Chow, G.Y. Chai, L. Chernyak, O. Lopatiuk-Tirpak, H. Heinrich (2008) “Focused-ion-beam fabrication of ZnO nanorod-based UV photodetector using the in-situ lift-out technique” Physica Status Solidi A, 205, 2673-2678.
  13. R.E. Peale, O. Lopatiuk, J. Cleary, S. Santos, J. Henderson, D. Clark, L. Chernyak,  T.A. Winningham, E. Del Barco, H. Heinrich, W.R. Buchwald (2008) “Propagation of high-frequency surface plasmons on gold” J. of the Optical Society of America B, 25, 1708-1713.
  14. O. Lupan, L. Chow, G. Chai, A. Schulte, S. Park, O. Lopatiuk-Tirpak, L. Chernyak, H. Heinrich (2008) “Biopolymer-assisted self-assembly of ZnO nanoarchitectures from nanorods Superlattices and Microstructures”, 43, 292-302.
  15. Y.I. Alivov, B. Xiao, S. Akarca-Biyikli, Q. Fan, H. Morkoc, D. Johnstone, O. Lopatiuk-Tirpak, L. Chernyak, W. Litton (2008) “Properties of isotype n-ZnO/n-GaN heterostructures studied by I-V-T and electron beam induced current methods” J. Phys.-Condensed Matter, 20, 085201.
  16. L. Chernyak, C. Schwarz, E.S. Flitsiyan, K. Gartsman (2008) “Electron beam induced current profiling of ZnO p-n homojunctions “        Appl. Phys. Lett., 92, 102106 (3 pages).
  17. Robert Peale, Elena S Flitsiyan, Casey M Swartz, Oleg Lupan, Leonid Chernyak, Lee Chow,     William Vernetson, Zinovi Dashevsky (2009) “Neutron transmutation doping and radiation hardness for solution-grown bulk and nano-structured ZnO” Performance and Reliability of Semiconductor Devices, MRS Proc., 1108, A05-03.
  18. Y. Lin, E. Flitsyian, L. Chernyak, T. Malinauskas, R. Aleksiejunas, K. Jarasiunas,                  W. Lim, S.J. Pearton, K. Gartsman (2009) “Optical and electron beam studies of carrier transport in quasibulk GaN”            Appl. Phys. Lett., 95, 092101 (3 pages).
  19. Z. Dashevsky, V. Kasiyan, S. Asmontas, J. Gradauskas, E. Shirmulis, E. Flitsiyan, L. Chernyak (2009) “ Photothermal effect in narrow band gap PbTe semiconductor” J. Appl. Phys., 106, 076105 (3 pages).
  20. Z. Dashevsky, R. Kreizman, E. Shufer, V. Kasiyan, E. Flitsiyan, M. Shatkhin, L. Chernyak (2009) “Nanocrystalline PbTe Films” Journal of Nanoelectronics and Optoelectronics, 4, 1-6.
  21. E. Shufer, Z. Dashevsky, V. Kasiyan, E. Flitsiyan, L. Chernyak, K. Gartsman (2010) “Electrical conductivity and minority carrier diffusion in thermally oxidized PbTe thin films” Physica B, 405, 1058-1061.
  22. L. Chernyak, E. Flitsiyan, M. Shatkhin, and Z. Dashevsky (2010) “Studies of Electron Trapping in ZnO Semiconductor” ECS Transactions, 28 (4), 3-11.
  23. Z. Dashevsky, E. Shufer, V. Kasiyan, E. Flitsiyan and L. Chernyak (2010) “Influence of oxygen treatment on transport properties of PbTe:In polycrystalline films”, Physica B, 405 (10), 2380-2384.
  24. E. Flitsyian, C. Schwarz, L. Chernyak, R.E. Peale, Z. Dashevsky, W. Vernetson (2011) “Neutron Irradiation-Induced Enhancement of Electronic Carrier Transport in ZnO” Radiation Effects and Defects in Solids,166 (2), 104-11.
  25. Y. Lin, M. Shatkhin, E. Flitsiyan, L. Chernyak, Z. Dashevsky, S. Chu, J.L. Liu (2011) “Minority carrier transport in p-ZnO nanowires” J. Appl. Phys., 109, 016107 (3 pages).
  26. P. Onufrijevs, T. Serevicius, P. Scajev, G. Manolis, A. Medvids, L. Chernyak,               E. Kuokstis, C.C. Yang, K. Jarasiunas (2011) “Characterization of Optical and Photoelectrical Properties of ZnO Crystals” ACTA PHYSICA POLONICA A, 119 (2), 274-276.
  27. G.P. Wang, S. Chu, N. Zhan, Y.Q. Lin, L. Chernyak, J.L. Liu (2011) “ZnO homojunction photodiodes based on Sb-doped p-type nanowire array and n-type film for ultraviolet detection” Appl. Phys. Lett., 98, 041107 (3 pages).
  28. Casey Schwarz, Yuqing Lin, Max Shathkin, Elena Flitsiyan and Leonid Chernyak (2011) “Cathodoluminescence studies of electron irradiation effects in n-type ZnO” J. Phys.: Condens. Matter, 23, 334204.
  29. S. Chu, G.P. Wang, W.H. Zhou, Y.Q. Lin, L. Chernyak, J.Z. Zhao, J.Y. Kong, L. Li, J.J. Ren, J.L. Liu (2011) “Electrically pumped waveguide lasing from ZnO nanowires” NATURE NANOTECHNOLOGY, 6 (8), 506-510.
  30. C. Schwarz, E. Flitsiyan, L. Chernyak, V. Casian, R. Schneck, Z. Dashevsky, S. Chu, J.L. Liu (2011) “Impact of forward bias injection on minority carrier transport in p-type ZnO nanowires”J. Appl. Phys., 110, 056108 (3 pages).
  31. E. Flitsyian, Z. Dashevsky and L. Chernyak, “Minority carrier transport in ZnO and related materials”, in Advances in GaN and ZnO-based Thin Film, Bulk and Nanostructured Materials and Device, ed. S.J. Pearton, Springer (2012).
  32. C.F. Lo, L. Liu, T.S. Kang, F. Ren, C. Schwarz, E. Flitsiyan, L. Chernyak, H.Y. Kim,J. Kim,  S.P. Yun, O. Laboutin, Y. Cao, J.W. Johnson, S.J. Pearton (2012) ““Degradation of dc characteristics of InAlN/GaN high electron mobility transistors by 5 MeV proton irradiation”, J. Vac. Sci. Technol., 30, 031202.
  33. V. Kasiyan, Z. Dashevsky, C.M. Schwarz, M. Shatkhin, E. Flitsiyan, L. Chernyak,         D. Khokhlov (2012) “Infrared detectors based on semiconductor p-n junction of PbSe”, J. Appl. Phys., 112, 086101 (3 pages).
  34. J. Huang, S. Chu, J.Y. Kong, L. Zhang, C.M. Schwarz, G.P. Wang, L. Chernyak, Z.H. Chen, J.L. Liu (2013) “ZnO p-n Homojunction Random Laser Diode Based on Nitrogen-Doped p-type Nanowires”, Advanced Optical Materials, 1 (2), 179-185.
  35. C. Schwarz, A. Yadav, M. Shatkhin, E. Flitsiyan, L. Chernyak, V. Kasiyan, L. Liu, Y.Y. Xi, F. Ren, S.J. Pearton, C.F. Lo, J.W. Johnson, E. Danilova (2013)“Gamma irradiation impact on electronic carrier transport in AlGaN/GaN high electron mobility transistors”, Appl. Phys. Lett., 102, 062102 (3 pages).
  36. Ya-Hsi Hwang, Yueh-Ling Hsieh, Lei Lei, Shun Li, Fan Ren, Stephen J. Pearton, Anupama Yadav, Casey Schwarz, Max Shatkhin, Luther Wang, Elena Flitsiyan,            Leonid Chernyak, Albert G. Baca, Andrew A. Allerman, Carlos A. Sanchez and I. I. Kravchenko (2014)”Effect of low dose γ-irradiation on DC performance of circular AlGaN/GaN high electron mobility transistors”, J. Vac. Sci. Technol., B 32, 031203.
  37. Anupama Yadav, Casey Schwarz, Max Shatkhin, Luther Wang, Elena Flitsiyan,            Leonid Chernyak, Lu Liu, Y.H. Hwang, Fan Ren, Stephen J. Pearton, and Igor Lubomirsky (2014) “Effect of Annealing on Electronic Carrier Transport Properties of Gamma-Irradiated AlGaN/GaN High Electron Mobility Transistors”, ECS Trans., 61 (4), 171-177.
  38. Ya-Hsi Hwang, Yueh-Ling Hsieh, L Lei, Shun Li, Fan Ren, Stephen J. Pearton, Anupama Yadav, Casey Schwarz, Max Shatkhin, L Wang, Elena Flitsiyan, Leonid Chernyak, Albert G Baca, A Allerman, Carlos A Sanchez, and I. I. Kravchenko (2014)“Effect of Gamma Irradiation on DC Performance of Circular-Shaped AlGaN/GaN High Electron Mobility Transistors”, ECS Trans., 61 (4), 205-210.
  39. Anupama Yadav, Elena Flitsiyan, Leonid Chernyak, Ya-Hsi Hwang, Yueh-Ling Hsieh, Lei Lei, Fan Ren, Stephen J. Pearton, and Igor Lubomirsky, “Impact of low dose gamma irradiation on electronic carrier transport in AlGaN/GaN High Electron Mobility Transistors” MRS Proceedings, 1792, 2137760 (2015).
  40. Anupama Yadav, Elena Flitsiyan, Leonid Chernyak, Ya-Hsi Hwang, Yueh-Ling Hsieh, Lei Lei, Fan Ren, Stephen J. Pearton, and Igor Lubomirsky, “Low and moderate dose gamma-irradiation and annealing impact on electronic and electrical  properties of AlGaN/GaN High Electron Mobility Transistors” Radiation Effects and Defects in Solids, 170, 2 (2015).
  41. Elena Flitsiyan, Leonid Chernyak, Electron Injection Effects in Wide-Band-Gap Semiconductors, Lambert Academic Publishing, 1-56 (2014).
  42. Ya-Hsi Hwang, Yueh-Ling Hsieh, Lei Lei, Shun Li, Fan Ren, Stephen J. Pearton, Anupama Yadav, Casey Schwarz, Max Shatkhin, Luther Wang, Elena Flitsiyan, Leonid Chernyak, Albert G. Baca, Andrew A. Allerman, Carlos A. Sanchez, I. I. Kravchenko, “Effect of low dose gamma-irradiation on DC performance of circular AlGaN/GaN high electron mobility transistors” J. Vac. Sci. Technol. B 32(3), (2014).

 

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