Rf conductivity of a two-dimensional electron system at small Landau-level filling factors

M. A. Paalanen; R. L. Willett; P. B. Littlewood; R. R. Ruel; K. W. West; L. N. Pfeiffer; D. J. Bishop

doi:10.1103/PhysRevB.45.11342

Rf conductivity of a two-dimensional electron system at small Landau-level filling factors

M. A. Paalanen, R. L. Willett, P. B. Littlewood, R. R. Ruel, K. W. West, L. N. Pfeiffer, D. J. Bishop

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

96 Scopus citations

Abstract

We have determined the dynamical conductivity (k,) of the two-dimensional (2D) electrons in extremely high-mobility GaAs/Al1-xGaxAs heterostructures by measuring the attenuation and velocity of surface acoustic waves. In the small-filling-factor limit we find a broad conductivity resonance indicating a pinning mode of the 2D electron system, which has condensed into an ordered phase. Surprisingly, the data suggest a relatively small correlation length even in these high-quality systems.

Original language	English (US)
Pages (from-to)	11342-11345
Number of pages	4
Journal	Physical Review B
Volume	45
Issue number	19
DOIs	https://doi.org/10.1103/PhysRevB.45.11342
State	Published - 1992
Externally published	Yes

All Science Journal Classification (ASJC) codes

Condensed Matter Physics

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10.1103/PhysRevB.45.11342

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title = "Rf conductivity of a two-dimensional electron system at small Landau-level filling factors",

abstract = "We have determined the dynamical conductivity (k,) of the two-dimensional (2D) electrons in extremely high-mobility GaAs/Al1-xGaxAs heterostructures by measuring the attenuation and velocity of surface acoustic waves. In the small-filling-factor limit we find a broad conductivity resonance indicating a pinning mode of the 2D electron system, which has condensed into an ordered phase. Surprisingly, the data suggest a relatively small correlation length even in these high-quality systems.",

author = "Paalanen, {M. A.} and Willett, {R. L.} and Littlewood, {P. B.} and Ruel, {R. R.} and West, {K. W.} and Pfeiffer, {L. N.} and Bishop, {D. J.}",

year = "1992",

doi = "10.1103/PhysRevB.45.11342",

language = "English (US)",

volume = "45",

pages = "11342--11345",

journal = "Physical Review B",

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T1 - Rf conductivity of a two-dimensional electron system at small Landau-level filling factors

AU - Paalanen, M. A.

AU - Willett, R. L.

AU - Littlewood, P. B.

AU - Ruel, R. R.

AU - West, K. W.

AU - Pfeiffer, L. N.

AU - Bishop, D. J.

PY - 1992

Y1 - 1992

N2 - We have determined the dynamical conductivity (k,) of the two-dimensional (2D) electrons in extremely high-mobility GaAs/Al1-xGaxAs heterostructures by measuring the attenuation and velocity of surface acoustic waves. In the small-filling-factor limit we find a broad conductivity resonance indicating a pinning mode of the 2D electron system, which has condensed into an ordered phase. Surprisingly, the data suggest a relatively small correlation length even in these high-quality systems.

AB - We have determined the dynamical conductivity (k,) of the two-dimensional (2D) electrons in extremely high-mobility GaAs/Al1-xGaxAs heterostructures by measuring the attenuation and velocity of surface acoustic waves. In the small-filling-factor limit we find a broad conductivity resonance indicating a pinning mode of the 2D electron system, which has condensed into an ordered phase. Surprisingly, the data suggest a relatively small correlation length even in these high-quality systems.

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U2 - 10.1103/PhysRevB.45.11342

DO - 10.1103/PhysRevB.45.11342

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SP - 11342

EP - 11345

JO - Physical Review B

JF - Physical Review B

IS - 19

ER -

Rf conductivity of a two-dimensional electron system at small Landau-level filling factors

Abstract

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