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Journal Papers (refereed)
2017
F. Alema, B. Hertog, A. Osinsky, P. Mukhopadhyay, M. Toporkov, and W.V. Schoenfeld
"Fast growth rate of epitaxial beta-Ga2O3 by close coupled showerhead MOCVD"
Journal of Crystal Growth, 475, pp. 77-82
2017
M. Toporkov, M. B. Ullah, D. O. Demchenko, V. Avrutin, H. Morkoc, and U. Ozgur
"Effect of oxygen-to-metal flux ratio on incorporation of metal species into quaternary BeMgZnO grown by plasma-assisted molecular beam epitaxy"
Journal of Crystal Growth, 467, pp. 145-149
2017
R. Green, M. Toporkov, M. B. Ullah, V. Avrutin, Ü. Özgür, H. Morkoç, and E. Topsakal
"An alternative material for transparent antennas for commercial and medical applications"
Microwave and Optical Technology Letters, 59, pp. 773–777
2016
M. A. Reshchikov, J. D. McNamara, M. Toporkov, V. Avrutin, H. Morkoç, A. Usikov, H. Helava and Yu. Makarov,
"Determination of the electron-capture coefficients and the concentration of free electrons in GaN from time-resolved photoluminescence"
Sci Rep. 2016; 6: 37511.
2016
Md Ullah, Vitaliy Avrutin, Si Qian Li, Saikat Das, Morteza Monavarian, Mykyta Toporkov, Ümit Özgür, Pierre Ruterana, Hadis Morkoç
"Polarity control and residual strain in ZnO epilayers grown by molecular beam epitaxy on (0001) GaN/sapphire"
Phys. Status Solidi RRL, 1–5 (2016)
2016
M. Toporkov, D. Demchenko, Z. Zolnai, J. Volk, V. Avrutin H. Morkoç, and Ü. Özgür,
"Lattice parameters and electronic structure of BeMgZnO quaternary solid solutions: experiment and theory"
Journal of Applied Physics, 119, pp.095311
2015
Sermuksnis, J. Liberis, M. Ramonas, A. Matulionis, M. Toporkov, H. Liu, V. Avrutin, Ü. Özgür, H. Morkoç,
"Hot-electron energy relaxation time in Ga-doped ZnO films"
J. Appl. Phys., 117, 065704 (2015)
2015
Sermuksnis, J. Liberis, A. Matulionis, M. Toporkov, V. Avrutin, U. Ozgur, H. Morkoc,
"Hot-electron noise and energy relaxation in wurtzite ZnO"
Int. Conf. Noise Fluct. ICNF, pp. 1-4 (2015)
2015
Zolnai, M. Toporkov, J. Volk, D. Demchenko, S. Okur, Z. Szabó, Ü. Özgür, H. Morkoç, V. Avrutin, E. Kótai,
"Nondestructive atomic compositional analysis of BeMgZnO quaternary alloys using ion beam analytical techniques"
Appl. Surf. Sci. 327, 43 (2015)
2014
M. Toporkov, V. Avrutin, S. Okur, N. Izyumskaya, D. Demchenko, J. Volk, D. J. Smith, H. Morkoç, Ü. Özgür,
"Enhancement of Be and Mg incorporation in wurtzite quaternary BeMgZnO alloys with up to 5.1 eV optical bandgap"
Journal of Crystal Growth 402, 60
Conference Proceedings
2017
M. Toporkov, P. Mukhopadhyay, H. Ali, V. Beletsky, F. Alema, A. Osinsky, and W.V. Schoenfeld
"MgZnO grown by molecular beam epitaxy on n-type ß-Ga2O3 for uv Schottky barrier solar-blind photodetectors"
SPIE Photonics West, San Francisco, California, 10105
2017
M.B Ullah, M. Toporkov, V. Avrutin, Ü. Özgür, D.J. Smith, and H. Morkoç
"Quaternary BeMgZnO by plasma-enhanced molecular beam epitaxy for BeMgZnO/ZnO heterostructure devices"
SPIE 10105, Oxide-based Materials and Devices VIII, 101050J
2017
F. Alema, B. Hertog, A. Osinsky, P. Mukhopadhyay, M. Toporkov, W.V. Schoenfeld, E. Ahmadi, and J. Speck
"Vertical solar blind Schottky photodiode based on Homoepitaxial Ga2O3 thin film"
SPIE Photonics West, San Francisco, California, 10105
2016
M. Toporkov, S. Hafiz, M.D.B. Ullah, N. Tanner, V. Avrutin, H. Morkoç, and Ü. Özgür
"Exciton localization and large stokes shift in quaternary BeMgZnO grown by molecular beam epitaxy"
SPIE 9749, Oxide-based Materials and Devices VII, 974910
Invited Presentations
2018
W. V. Schoenfeld*, M. Toporkov, and P. Mukhopadhyay
"Invited Talk: Tin-Gallium-Oxide-Based UV-C Detectors"
SPIE Photonics West, Oxide-based Materials and Devices IX, San Francisco, CA (2018).
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