Experimental study of weak antilocalization effects in a two-dimensional system: Anomalous dephasing rate

K. H. Gao; G. Yu; Y. M. Zhou; W. Z. Zhou; T. Lin; J. H. Chu; N. Dai; D. G. Austing; Y. Gu; Y. G. Zhang

doi:10.1103/PhysRevB.79.085310

Experimental study of weak antilocalization effects in a two-dimensional system: Anomalous dephasing rate

K. H. Gao
, G. Yu^*
, Y. M. Zhou
, W. Z. Zhou
, T. Lin
, J. H. Chu
, N. Dai
, D. G. Austing
, Y. Gu
, Y. G. Zhang

^*Corresponding author for this work

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

13 Scopus citations

Abstract

The quantum corrections to magnetoconductivity were studied in a high-mobility InGaAs/InAlAs sample with strong spin-orbit coupling. The weak antilocalization-induced drop in conductivity increases with decreasing conductivity. The experiment is well explained by theory. A spin-splitting energy larger than 5 meV obtained by fitting indicates strong spin-orbit coupling. The extracted dephasing rate as a function of temperature can be qualitatively described by modified Fermi-liquid theory with small-energy-transfer processes. Nonetheless, the extracted dephasing rate linearly increases with increasing conductivity, which is in conflict with the Fermi-liquid model.

Original language	English
Article number	085310
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	79
Issue number	8
DOIs	https://doi.org/10.1103/PhysRevB.79.085310
State	Published - 13 Feb 2009
Externally published	Yes

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title = "Experimental study of weak antilocalization effects in a two-dimensional system: Anomalous dephasing rate",

abstract = "The quantum corrections to magnetoconductivity were studied in a high-mobility InGaAs/InAlAs sample with strong spin-orbit coupling. The weak antilocalization-induced drop in conductivity increases with decreasing conductivity. The experiment is well explained by theory. A spin-splitting energy larger than 5 meV obtained by fitting indicates strong spin-orbit coupling. The extracted dephasing rate as a function of temperature can be qualitatively described by modified Fermi-liquid theory with small-energy-transfer processes. Nonetheless, the extracted dephasing rate linearly increases with increasing conductivity, which is in conflict with the Fermi-liquid model.",

author = "Gao, \{K. H.\} and G. Yu and Zhou, \{Y. M.\} and Zhou, \{W. Z.\} and T. Lin and Chu, \{J. H.\} and N. Dai and Austing, \{D. G.\} and Y. Gu and Zhang, \{Y. G.\}",

year = "2009",

month = feb,

day = "13",

doi = "10.1103/PhysRevB.79.085310",

language = "英语",

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journal = "Physical Review B - Condensed Matter and Materials Physics",

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T1 - Experimental study of weak antilocalization effects in a two-dimensional system

T2 - Anomalous dephasing rate

AU - Gao, K. H.

AU - Yu, G.

AU - Zhou, Y. M.

AU - Zhou, W. Z.

AU - Lin, T.

AU - Chu, J. H.

AU - Dai, N.

AU - Austing, D. G.

AU - Gu, Y.

AU - Zhang, Y. G.

PY - 2009/2/13

Y1 - 2009/2/13

N2 - The quantum corrections to magnetoconductivity were studied in a high-mobility InGaAs/InAlAs sample with strong spin-orbit coupling. The weak antilocalization-induced drop in conductivity increases with decreasing conductivity. The experiment is well explained by theory. A spin-splitting energy larger than 5 meV obtained by fitting indicates strong spin-orbit coupling. The extracted dephasing rate as a function of temperature can be qualitatively described by modified Fermi-liquid theory with small-energy-transfer processes. Nonetheless, the extracted dephasing rate linearly increases with increasing conductivity, which is in conflict with the Fermi-liquid model.

AB - The quantum corrections to magnetoconductivity were studied in a high-mobility InGaAs/InAlAs sample with strong spin-orbit coupling. The weak antilocalization-induced drop in conductivity increases with decreasing conductivity. The experiment is well explained by theory. A spin-splitting energy larger than 5 meV obtained by fitting indicates strong spin-orbit coupling. The extracted dephasing rate as a function of temperature can be qualitatively described by modified Fermi-liquid theory with small-energy-transfer processes. Nonetheless, the extracted dephasing rate linearly increases with increasing conductivity, which is in conflict with the Fermi-liquid model.

UR - https://www.scopus.com/pages/publications/62549166755

U2 - 10.1103/PhysRevB.79.085310

DO - 10.1103/PhysRevB.79.085310

M3 - 文章

AN - SCOPUS:62549166755

SN - 1098-0121

VL - 79

JO - Physical Review B - Condensed Matter and Materials Physics

JF - Physical Review B - Condensed Matter and Materials Physics

IS - 8

M1 - 085310

ER -

Experimental study of weak antilocalization effects in a two-dimensional system: Anomalous dephasing rate

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