Scattering times in AlGaN/GaN two-dimensional electron gas from magnetotransport measurements

Z. J. Qiu; Y. S. Gui; T. Lin; J. Lu; N. Tang; B. Shen; N. Dai; J. H. Chu

doi:10.1016/j.ssc.2004.04.021

Scattering times in AlGaN/GaN two-dimensional electron gas from magnetotransport measurements

Z. J. Qiu^*
, Y. S. Gui
, T. Lin
, J. Lu
, N. Tang
, B. Shen
, N. Dai
, J. H. Chu

^*Corresponding author for this work

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

6 Scopus citations

Abstract

The various scattering times of two-dimensional electron gas were investigated in modulation-doped Al_0.22Ga_0.78N/GaN quantum wells by means of magnetotransport measurements. The ratio of transport and quantum scattering times, τ_t/τ_q∼1, shows that the dominant mobility-limiting mechanisms are short-range scattering potentials. The low-field magnetoresistance shows the weak antilocalization and localization phenomenon from which the spin-orbit scattering and inelastic scattering times are obtained. The inelastic scattering time is found to follow the T^-1 law, indicating that electron-electron scattering with small energy transfer is the dominant inelastic process.

Original language	English
Pages (from-to)	37-40
Number of pages	4
Journal	Solid State Communications
Volume	131
Issue number	1
DOIs	https://doi.org/10.1016/j.ssc.2004.04.021
State	Published - Jul 2004
Externally published	Yes

Keywords

A. Quantum well
D. Magnetoresistance
D. Two-dimensional electron gas

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10.1016/j.ssc.2004.04.021

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@article{42631d8d0356461a944ae6daf071199d,

title = "Scattering times in AlGaN/GaN two-dimensional electron gas from magnetotransport measurements",

abstract = "The various scattering times of two-dimensional electron gas were investigated in modulation-doped Al0.22Ga0.78N/GaN quantum wells by means of magnetotransport measurements. The ratio of transport and quantum scattering times, τt/τq∼1, shows that the dominant mobility-limiting mechanisms are short-range scattering potentials. The low-field magnetoresistance shows the weak antilocalization and localization phenomenon from which the spin-orbit scattering and inelastic scattering times are obtained. The inelastic scattering time is found to follow the T-1 law, indicating that electron-electron scattering with small energy transfer is the dominant inelastic process.",

keywords = "A. Quantum well, D. Magnetoresistance, D. Two-dimensional electron gas",

author = "Qiu, \{Z. J.\} and Gui, \{Y. S.\} and T. Lin and J. Lu and N. Tang and B. Shen and N. Dai and Chu, \{J. H.\}",

year = "2004",

month = jul,

doi = "10.1016/j.ssc.2004.04.021",

language = "英语",

volume = "131",

pages = "37--40",

journal = "Solid State Communications",

issn = "0038-1098",

publisher = "Elsevier Ltd",

number = "1",

}

TY - JOUR

T1 - Scattering times in AlGaN/GaN two-dimensional electron gas from magnetotransport measurements

AU - Qiu, Z. J.

AU - Gui, Y. S.

AU - Lin, T.

AU - Lu, J.

AU - Tang, N.

AU - Shen, B.

AU - Dai, N.

AU - Chu, J. H.

PY - 2004/7

Y1 - 2004/7

N2 - The various scattering times of two-dimensional electron gas were investigated in modulation-doped Al0.22Ga0.78N/GaN quantum wells by means of magnetotransport measurements. The ratio of transport and quantum scattering times, τt/τq∼1, shows that the dominant mobility-limiting mechanisms are short-range scattering potentials. The low-field magnetoresistance shows the weak antilocalization and localization phenomenon from which the spin-orbit scattering and inelastic scattering times are obtained. The inelastic scattering time is found to follow the T-1 law, indicating that electron-electron scattering with small energy transfer is the dominant inelastic process.

AB - The various scattering times of two-dimensional electron gas were investigated in modulation-doped Al0.22Ga0.78N/GaN quantum wells by means of magnetotransport measurements. The ratio of transport and quantum scattering times, τt/τq∼1, shows that the dominant mobility-limiting mechanisms are short-range scattering potentials. The low-field magnetoresistance shows the weak antilocalization and localization phenomenon from which the spin-orbit scattering and inelastic scattering times are obtained. The inelastic scattering time is found to follow the T-1 law, indicating that electron-electron scattering with small energy transfer is the dominant inelastic process.

KW - A. Quantum well

KW - D. Magnetoresistance

KW - D. Two-dimensional electron gas

UR - https://www.scopus.com/pages/publications/2442499148

U2 - 10.1016/j.ssc.2004.04.021

DO - 10.1016/j.ssc.2004.04.021

M3 - 文章

AN - SCOPUS:2442499148

SN - 0038-1098

VL - 131

SP - 37

EP - 40

JO - Solid State Communications

JF - Solid State Communications

IS - 1

ER -

Scattering times in AlGaN/GaN two-dimensional electron gas from magnetotransport measurements

Abstract

Keywords

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