M. V. Budantsev, A. G. Pogosov, A. E. Plotnikov, A. K. Bakarov, A. I. Toropov, J. C. Portal, “Nonequilibrium state of the two-dimensional electron gas in the integer quantum Hall effect regime”, Pis'ma v Zh. Èksper. Teoret. Fiz., 2009, Volume 89, Issue 1,Pages <nobr>49

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CONDENSED MATTER

Nonequilibrium state of the two-dimensional electron gas in the integer quantum Hall effect regime

M. V. Budantsev^a, A. G. Pogosov^a, A. E. Plotnikov^a, A. K. Bakarov^a, A. I. Toropov^a, J. C. Portal^bcd

^a A. V. Rzhanov Institute of Semiconductor Physics of SB RAS
^b GHMFL-CNRS, BP-166, F-38042 Grenoble, Cedex 9, France
^c INSA-Toulouse, Toulouse 31077, Cedex 4, France
^d Institut Universitaire de France, Toulouse, France

Abstract: We have compared the properties of the nonequilibrium state of the two-dimensional electron gas observed in the samples of different types by means of magnetotransport and magnetization measurements in the quantum Hall effect regime at integer filling factors n. It has been found that the range of filling factors corresponding to the nonequilibrium state is universal for the samples of different types and different measurement techniques and varies from 0.1 to 0.3 for n changing from 1 to 4. The comparison indicates that the observed nonequilibrium state is not directly caused by the appearance of eddy currents and the dielectric phase in the two-dimensional electron gas but is probably associated with the magnetic field-induced phase transition.

PACS: 71.45.-d, 73.23.-b, 73.43.-f

Received: 27.12.2007
Revised: 25.11.2008