AC and DC Conductivities in an n-GaAs/AlAs Heterostructure with a Wide Quantum Well in the Integer Quantum Hall Effect Regime

A. A. Dmitriev, I. L. Drichko, I. Yu Smirnov, A. K. Bakarov, A. A. Bykov

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

The direct-current (dc) σxxdc and alternating-current (ac) σxxac=σ1−iσ2 conductivities of a wide (46 nm) GaAs quantum well with the bilayer electron density distribution are measured. It is found that the magnetic field dependence of σxx exhibits three sets of oscillations related to the transitions between Landau levels in symmetric and antisymmetric subbands and with the transitions occurring owing to the Zeeman splitting of these subbands. The analysis of the frequency dependence of the ac conductivity and the σ12 ratio demonstrates that the conductivity at the minima of oscillations is determined by the hopping mechanism.

Original languageEnglish
Pages (from-to)68-73
Number of pages6
JournalJETP Letters
Volume110
Issue number1
DOIs
Publication statusPublished - 1 Jul 2019

Keywords

  • OSCILLATIONS
  • DEPENDENCE
  • SCATTERING

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