Session D11: Thermal Properties in Semiconductors and Nanostructures
2:30 PM–4:42 PM, Monday, March 21, 2011
Room: D222
Sponsoring Unit:
FIAP
Chair: Hongping Zhao, Lehigh University
Abstract ID: BAPS.2011.MAR.D11.5
Abstract: D11.00005 : Quantal Heating of 2D electrons in strong magnetic fields
3:18 PM–3:30 PM
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Abstract 
Authors:
Sergey Vitkalov
(The City College of New York, New York, NY 10031, USA)
Alexey Bykov
(Institute of Semiconductor Physics, 630090 Novosibirsk, Russia)
Usually heating of conducting electrons by $dc$ electric field increases electron temperature and effects weakly the electron transport. In this report we show that the $dc$ heating of 2D electrons with a quantized spectrum is very peculiar and violates strongly the Ohm's Law [1]. The quantal heating establishes nontrivial electron distribution, which has the same broadening or an effective ``temperature'' as the unbiased system. The heating reduces significantly the dissipative electron transport, forcing the quantum conductors into a state with zero differential resistance (ZDR). Furthermore an apparent $dc$ driven metal-insulator transition is found, which correlates with the transition into the ZDR state. This interesting correlation is unexpected and is not understood.\\[4pt] [1] J.-Q. Zhang, S.A. Vitkalov and A.A. Bykov, Phys. Rev. B 80, 045310 (2009); S. A. Vitkalov, International Journal of Modern Physics B, 23, 4727 (2009).
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2011.MAR.D11.5