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Pis'ma v Zh. Èksper. Teoret. Fiz., 2018, Volume 108, Issue 2, Pages 108–113 (Mi jetpl5628)  

CONDENSED MATTER

Zener tunneling between the Landau levels in a two-dimensional electron system with one-dimensional periodic modulation

A. A. Bykovab, I. S. Strygina, E. E. Podyakinaab, S. A. Vitkalovc

a Rzhanov Institute of Semiconductor Physics, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia
b Novosibirsk State University, Novosibirsk, Russia
c Physics Department, City College of the City University of New York, New York, USA

Abstract: Nonlinear magnetotransport in a two-dimensional electron gas in one-dimensional lateral lattices fabricated from a selectively doped GaAs/AlAs heterostructure is investigated. One-dimensional potential modulation is imposed on the two-dimensional electron gas by means of a set of metal strips formed on the planar surface of Hall bars. The dependences of the differential resistance $r_{xx}$ on the magnetic field $B<0.5$  T are studied at a temperature $T=1.6 $ K in lattices with a period of $a\approx 200$ nm. It is shown that periodic oscillations in $r_{xx}(1/B)$ occur in such lattices under the action of a current-induced Hall field due to Zener tunneling between Landau levels. Interference is found between Zener oscillations and commensurability oscillations of $r_{xx}$ in two-dimensional electron systems with one-dimensional periodic modulation. The experimental results are qualitatively explained by the role of Landau bands in nonlinear transport at large filling factors.

Funding Agency Grant Number
Russian Foundation for Basic Research 18-02-00603_
National Science Foundation 1702594


DOI: https://doi.org/10.1134/S0370274X18140084

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English version:
Journal of Experimental and Theoretical Physics Letters, 2018, 108:2, 121–126

Bibliographic databases:

Document Type: Article
Received: 06.06.2018
Revised: 20.06.2018

Citation: A. A. Bykov, I. S. Strygin, E. E. Podyakina, S. A. Vitkalov, “Zener tunneling between the Landau levels in a two-dimensional electron system with one-dimensional periodic modulation”, Pis'ma v Zh. Èksper. Teoret. Fiz., 108:2 (2018), 108–113; JETP Letters, 108:2 (2018), 121–126

Citation in format AMSBIB
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