Delta-Layer Quenched High-Frequency Conductivity in GaAs/AlGaAs Heterostructures: Acoustical Studies

Abstract

Electron density and high-frequency (hf) hopping conductivity of two-dimensional electron gas (2DEG) in SI delta-doped GaAs/AlGaAs heterostructures are studied by acoustic methods. In the quantum Hall regime at small filling factors both quantities appear dependent on the cooling procedure characterized by an initial temperature T (o) of a fast cooling to 4.2 K by immersing into liquid He. These facts are interpreted assuming that T (o) is the freezing temperature for the conductivity of the delta-layer which supplies electrons to 2D channel.

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Document Details

Document Type
Technical Report
Publication Date
Jun 01, 2001
Accession Number
ADP013303

Entities

People

  • A. M. Diakonov
  • A. V. Patsekin
  • I. L. Drichko
  • I. Yu. Smirnov
  • Yu. M. Galgerin

Organizations

  • Russian Academy of Sciences

Tags

Communities of Interest

  • Advanced Electronics

DTIC Thesaurus Topics

  • Acoustic Waves
  • Blood Coagulation Factors
  • Boiling Point
  • Carbon Resistors
  • Conductivity
  • Electron Density
  • Electron Energy
  • Electron Gas
  • Electrons
  • Fermi Levels
  • Frequency
  • Heterojunctions
  • Low Temperature
  • Magnetic Fields
  • Measurement
  • Surface Acoustic Wave Devices
  • Surface Acoustic Waves

Fields of Study

  • Materials science

Readers

  • Acoustical Oceanography.
  • Quantum Dot Semiconductor Device Photonics and Graphene Optoelectronic Materials and THz Physics.
  • Thermal Physics or Thermal Science.

Technology Areas

  • Microelectronics
  • Microelectronics - Graphene
  • Quantum Computing