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2D Lattice of coupled Sinai billiards: metal or insulator at g<<1 by Budantsev, M. V.; Kvon, Z. D.; Pogosov, A. G.; Gusev, G. M.; Portal, J. C.; Maude, D. K.; Moshegov, N. T.; Toropov, A. I. is a scholarly article available to read on EtoBox.

What is 2D Lattice of coupled Sinai billiards: metal or insulator at g<<1 about?

We investigate the transport in a two-dimensional (2D) lattice of coupled Sinai billiards fabricated on the basis of a high-mobility 2D electron gas in GaAs/AlGaAs heterojunction. For the states with low reduced conductivity g<<1 an anomalously weak temperature dependence of g was found. The large negative magnetoresistance described by the Lorentz line-shape of the width corresponding to the half magnetic flux quantum through the area of the billiard is observed. In going from g>1 to g<<1 it strongly increases. The Shubnikov-de Haas oscillations and commensurability magnetoresistance peak are preserved at g<<1. The data suggest that the system studied behaves more like a metal than an insulator at g<<1 and is not described by the generally accepted picture of Anderson localization.

Author

Budantsev, M. V.; Kvon, Z. D.; Pogosov, A. G.; Gusev, G. M.; Portal, J. C.; Maude, D. K.; Moshegov, N. T.; Toropov, A. I.

Published

1998

Language

EN