Nature of localized states in two-dimensional electron systems in the quantum Hall regime: Acoustic studies

I. L. Drichko; I. Yu Smirnov; A. V. Suslov; Y. M. Galperin; L. N. Pfeiffer; K. W. West

Nature of localized states in two-dimensional electron systems in the quantum Hall regime: Acoustic studies

I. L. Drichko, I. Yu Smirnov, A. V. Suslov, Y. M. Galperin, L. N. Pfeiffer, K. W. West

Research output: Contribution to journal › Review article › peer-review

Abstract

We review our work on studies of high-frequency conductance in two-dimensional high-mobility electronic systems in wide n-AlGaAs/GaAs/AlGaAs quantum wells. Using simultaneous measurements of the attenuation and velocity of a surface acoustic wave we have found both real and imaginary components of the complex high-frequency conductance. Based on the experimental results and their analysis we conclude that close to the filling factor v = 1/5, as well as in the interval 0.18 > v > 0.125, a Wigner crystal pinned by disorder is formed. Both the melting temperature and the correlation length of the pinning-induced domains in the Wigner crystal are found. In close vicinities of v = 1 and 2 transitions from single-electron localization to a Wigner crystal were observed.

Original language	English (US)
Pages (from-to)	104-114
Number of pages	11
Journal	Fizika Nizkikh Temperatur
Volume	43
Issue number	1
State	Published - Jan 2017
Externally published	Yes

All Science Journal Classification (ASJC) codes

General Physics and Astronomy

Keywords

High-frequency transport
Two-dimensional electron gas

Cite this

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title = "Nature of localized states in two-dimensional electron systems in the quantum Hall regime: Acoustic studies",

abstract = "We review our work on studies of high-frequency conductance in two-dimensional high-mobility electronic systems in wide n-AlGaAs/GaAs/AlGaAs quantum wells. Using simultaneous measurements of the attenuation and velocity of a surface acoustic wave we have found both real and imaginary components of the complex high-frequency conductance. Based on the experimental results and their analysis we conclude that close to the filling factor v = 1/5, as well as in the interval 0.18 > v > 0.125, a Wigner crystal pinned by disorder is formed. Both the melting temperature and the correlation length of the pinning-induced domains in the Wigner crystal are found. In close vicinities of v = 1 and 2 transitions from single-electron localization to a Wigner crystal were observed.",

keywords = "High-frequency transport, Two-dimensional electron gas",

author = "Drichko, {I. L.} and Smirnov, {I. Yu} and Suslov, {A. V.} and Galperin, {Y. M.} and Pfeiffer, {L. N.} and West, {K. W.}",

note = "Publisher Copyright: {\textcopyright} G.E. Volovik, 2017.",

year = "2017",

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language = "English (US)",

volume = "43",

pages = "104--114",

journal = "Fizika Nizkikh Temperatur",

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TY - JOUR

T1 - Nature of localized states in two-dimensional electron systems in the quantum Hall regime

T2 - Acoustic studies

AU - Drichko, I. L.

AU - Smirnov, I. Yu

AU - Suslov, A. V.

AU - Galperin, Y. M.

AU - Pfeiffer, L. N.

AU - West, K. W.

N1 - Publisher Copyright: © G.E. Volovik, 2017.

PY - 2017/1

Y1 - 2017/1

N2 - We review our work on studies of high-frequency conductance in two-dimensional high-mobility electronic systems in wide n-AlGaAs/GaAs/AlGaAs quantum wells. Using simultaneous measurements of the attenuation and velocity of a surface acoustic wave we have found both real and imaginary components of the complex high-frequency conductance. Based on the experimental results and their analysis we conclude that close to the filling factor v = 1/5, as well as in the interval 0.18 > v > 0.125, a Wigner crystal pinned by disorder is formed. Both the melting temperature and the correlation length of the pinning-induced domains in the Wigner crystal are found. In close vicinities of v = 1 and 2 transitions from single-electron localization to a Wigner crystal were observed.

AB - We review our work on studies of high-frequency conductance in two-dimensional high-mobility electronic systems in wide n-AlGaAs/GaAs/AlGaAs quantum wells. Using simultaneous measurements of the attenuation and velocity of a surface acoustic wave we have found both real and imaginary components of the complex high-frequency conductance. Based on the experimental results and their analysis we conclude that close to the filling factor v = 1/5, as well as in the interval 0.18 > v > 0.125, a Wigner crystal pinned by disorder is formed. Both the melting temperature and the correlation length of the pinning-induced domains in the Wigner crystal are found. In close vicinities of v = 1 and 2 transitions from single-electron localization to a Wigner crystal were observed.

KW - High-frequency transport

KW - Two-dimensional electron gas

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M3 - Review article

AN - SCOPUS:85007047634

SN - 0132-6414

VL - 43

SP - 104

EP - 114

JO - Fizika Nizkikh Temperatur

JF - Fizika Nizkikh Temperatur

IS - 1

ER -

Nature of localized states in two-dimensional electron systems in the quantum Hall regime: Acoustic studies

Abstract

All Science Journal Classification (ASJC) codes

Keywords

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