Landau level crossing in a spin-orbit coupled two-dimensional electron gas

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2015
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AIP Publishing
Abstract

We have studied experimentally theᅠLandau levelᅠ(LL) spectrum of a two-dimensionalᅠelectron gasᅠ(2DEG)ᅠin an In0.53Ga0.47As/InPᅠquantum wellᅠstructure by means of low-temperature magneto-transport coincidence measurement in vectorᅠmagnetic fields.ᅠIt is well known that LL crossing occurs in tiltedᅠmagnetic fieldsᅠdue to a competition between cyclotron energy andᅠZeeman effect.ᅠRemarkably, here we observe an additional type of level-crossing resulting from a competition between Rashba andᅠZeeman splittingᅠin a smallᅠmagnetic field,ᅠconsistent with theᅠtheoreticalᅠprediction for strongly spin-orbit coupledᅠ2DEG.

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Wu, Xing-Jun, Li, Ting-Xin, Zhang, Chi, et al.. "Landau level crossing in a spin-orbit coupled two-dimensional electron gas." Applied Physics Letters, 106, no. 1 (2015) AIP Publishing: http://dx.doi.org/10.1063/1.4905492.

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