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Title: Degeneracy and effective mass in the valence band of two-dimensional (100)-GaAs quantum well systems

Abstract

Quantum Hall measurement of two-dimensional high-mobility [μ∼2×10{sup 6} cm{sup 2}/(V·s)] hole systems confined in a 20 nm wide (100)-GaAs quantum well have been performed for charge densities between 4 and 5 × 10{sup 10} cm{sup −2} in a temperature range of 10–160 mK. The Fourier analysis of the Shubnikov-de Haas (SdH) oscillations of the magnetoresistance vs. the inverse of the magnetic field 1/B reveals a single peak, indicating a degenerate heavy hole (HH) band. The hole density p=(e/h)·f agrees with the Hall measurement result within 3%. The HH band degeneracy is understood through the diminishing spin-orbit interaction due to the low charge density and the nearly symmetric confinement. SdH oscillations fitted for 0.08 T ≤ B ≤ 0.24 T to the Dingle parameters yield an effective mass between 0.30 and 0.50 m{sub e} in good agreement with previous cyclotron resonance results.

Authors:
; ; ;  [1]; ;  [2]
  1. Department of Physics and Astronomy, Wayne State University, 666 W. Hancock, Detroit, Michigan 48201 (United States)
  2. Department of Electrical Engineering, Princeton University, Princeton, New Jersey 08544 (United States)
Publication Date:
OSTI Identifier:
22283070
Resource Type:
Journal Article
Journal Name:
Applied Physics Letters
Additional Journal Information:
Journal Volume: 104; Journal Issue: 9; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0003-6951
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; 77 NANOSCIENCE AND NANOTECHNOLOGY; CHARGE DENSITY; CYCLOTRON RESONANCE; EFFECTIVE MASS; ELECTRONIC STRUCTURE; FOURIER ANALYSIS; GALLIUM ARSENIDES; HOLE MOBILITY; HOLES; L-S COUPLING; MAGNETIC FIELDS; MAGNETORESISTANCE; OSCILLATIONS; QUANTUM WELLS; TEMPERATURE RANGE 0000-0013 K; TWO-DIMENSIONAL CALCULATIONS; VALENCE

Citation Formats

Tarquini, Vinicio, Knighton, Talbot, Wu, Zhe, Huang, Jian, Pfeiffer, Loren, and West, Ken. Degeneracy and effective mass in the valence band of two-dimensional (100)-GaAs quantum well systems. United States: N. p., 2014. Web. doi:10.1063/1.4867086.
Tarquini, Vinicio, Knighton, Talbot, Wu, Zhe, Huang, Jian, Pfeiffer, Loren, & West, Ken. Degeneracy and effective mass in the valence band of two-dimensional (100)-GaAs quantum well systems. United States. https://doi.org/10.1063/1.4867086
Tarquini, Vinicio, Knighton, Talbot, Wu, Zhe, Huang, Jian, Pfeiffer, Loren, and West, Ken. Mon . "Degeneracy and effective mass in the valence band of two-dimensional (100)-GaAs quantum well systems". United States. https://doi.org/10.1063/1.4867086.
@article{osti_22283070,
title = {Degeneracy and effective mass in the valence band of two-dimensional (100)-GaAs quantum well systems},
author = {Tarquini, Vinicio and Knighton, Talbot and Wu, Zhe and Huang, Jian and Pfeiffer, Loren and West, Ken},
abstractNote = {Quantum Hall measurement of two-dimensional high-mobility [μ∼2×10{sup 6} cm{sup 2}/(V·s)] hole systems confined in a 20 nm wide (100)-GaAs quantum well have been performed for charge densities between 4 and 5 × 10{sup 10} cm{sup −2} in a temperature range of 10–160 mK. The Fourier analysis of the Shubnikov-de Haas (SdH) oscillations of the magnetoresistance vs. the inverse of the magnetic field 1/B reveals a single peak, indicating a degenerate heavy hole (HH) band. The hole density p=(e/h)·f agrees with the Hall measurement result within 3%. The HH band degeneracy is understood through the diminishing spin-orbit interaction due to the low charge density and the nearly symmetric confinement. SdH oscillations fitted for 0.08 T ≤ B ≤ 0.24 T to the Dingle parameters yield an effective mass between 0.30 and 0.50 m{sub e} in good agreement with previous cyclotron resonance results.},
doi = {10.1063/1.4867086},
url = {https://www.osti.gov/biblio/22283070}, journal = {Applied Physics Letters},
issn = {0003-6951},
number = 9,
volume = 104,
place = {United States},
year = {2014},
month = {3}
}