Magneto-transport study of Landau level broadening in a gated AlGaAs/GaAs parabolic quantum well structure

Y. M. Zhou; G. Yu; T. Lin; N. Dai; J. H. Chu

doi:10.1016/j.physb.2011.09.136

Magneto-transport study of Landau level broadening in a gated AlGaAs/GaAs parabolic quantum well structure

Y. M. Zhou^*
, G. Yu
, T. Lin
, N. Dai
, J. H. Chu

^*Corresponding author for this work

Hubei University of Technology
CAS - Shanghai Institute of Technical Physics

Research output: Contribution to journal › Article › peer-review

3 Scopus citations

Abstract

We study the Landau level broadening by analyzing the Shubnikov-de Haas oscillations in a gated AlGaAs/GaAs parabolic quantum well structure when only one electronic subband is occupied. Small-angle scattering is determined to be important in this system. The Shubnikov-de Haas oscillations are described equally well by employing Gaussian or Lorentzian broadening of the Landau levels at low magnetic field where the quantum localization effect is not important. A possible explanation is that the electronelectron interactions lead to the overlapping of adjacent Landau levels and one can not distinguish between the two broadening types.

Original language	English
Pages (from-to)	116-119
Number of pages	4
Journal	Physica B: Condensed Matter
Volume	407
Issue number	1
DOIs	https://doi.org/10.1016/j.physb.2011.09.136
State	Published - 1 Jan 2012
Externally published	Yes

Keywords

Landau level broadening
Parabolic quantum well
Shubnikov-de Haas oscillation
Two-dimensional electron gas

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10.1016/j.physb.2011.09.136

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title = "Magneto-transport study of Landau level broadening in a gated AlGaAs/GaAs parabolic quantum well structure",

abstract = "We study the Landau level broadening by analyzing the Shubnikov-de Haas oscillations in a gated AlGaAs/GaAs parabolic quantum well structure when only one electronic subband is occupied. Small-angle scattering is determined to be important in this system. The Shubnikov-de Haas oscillations are described equally well by employing Gaussian or Lorentzian broadening of the Landau levels at low magnetic field where the quantum localization effect is not important. A possible explanation is that the electronelectron interactions lead to the overlapping of adjacent Landau levels and one can not distinguish between the two broadening types.",

keywords = "Landau level broadening, Parabolic quantum well, Shubnikov-de Haas oscillation, Two-dimensional electron gas",

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T1 - Magneto-transport study of Landau level broadening in a gated AlGaAs/GaAs parabolic quantum well structure

AU - Zhou, Y. M.

AU - Yu, G.

AU - Lin, T.

AU - Dai, N.

AU - Chu, J. H.

PY - 2012/1/1

Y1 - 2012/1/1

N2 - We study the Landau level broadening by analyzing the Shubnikov-de Haas oscillations in a gated AlGaAs/GaAs parabolic quantum well structure when only one electronic subband is occupied. Small-angle scattering is determined to be important in this system. The Shubnikov-de Haas oscillations are described equally well by employing Gaussian or Lorentzian broadening of the Landau levels at low magnetic field where the quantum localization effect is not important. A possible explanation is that the electronelectron interactions lead to the overlapping of adjacent Landau levels and one can not distinguish between the two broadening types.

AB - We study the Landau level broadening by analyzing the Shubnikov-de Haas oscillations in a gated AlGaAs/GaAs parabolic quantum well structure when only one electronic subband is occupied. Small-angle scattering is determined to be important in this system. The Shubnikov-de Haas oscillations are described equally well by employing Gaussian or Lorentzian broadening of the Landau levels at low magnetic field where the quantum localization effect is not important. A possible explanation is that the electronelectron interactions lead to the overlapping of adjacent Landau levels and one can not distinguish between the two broadening types.

KW - Landau level broadening

KW - Parabolic quantum well

KW - Shubnikov-de Haas oscillation

KW - Two-dimensional electron gas

UR - https://www.scopus.com/pages/publications/81255136241

U2 - 10.1016/j.physb.2011.09.136

DO - 10.1016/j.physb.2011.09.136

M3 - 文章

AN - SCOPUS:81255136241

SN - 0921-4526

VL - 407

SP - 116

EP - 119

JO - Physica B: Condensed Matter

JF - Physica B: Condensed Matter

IS - 1

ER -

Magneto-transport study of Landau level broadening in a gated AlGaAs/GaAs parabolic quantum well structure

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Keywords

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