Surface acoustic wave propagation and inhomogeneities in low-density two-dimensional electron systems near the metal-insulator transition

L. A. Tracy; J. P. Eisenstein; M. P. Lilly; L. N. Pfeiffer; K. W. West

doi:10.1016/j.ssc.2005.10.028

Surface acoustic wave propagation and inhomogeneities in low-density two-dimensional electron systems near the metal-insulator transition

L. A. Tracy, J. P. Eisenstein, M. P. Lilly, L. N. Pfeiffer, K. W. West

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

22 Scopus citations

Abstract

We have measured the surface acoustic wave velocity shift in a GaAs/AlGaAs heterostructure containing a two-dimensional electron system (2DES) in a low-density regime (<10¹⁰ cm^-2) at zero magnetic field. The interaction of the surface acoustic wave with the 2DES is not well described by a simple model using low-frequency conductivity measurements. We speculate that this conflict is a result of inhomogeneities in the 2DES, which become very important at low density. This has implications for the putative metal-insulator transition in two dimensions.

Original language	English (US)
Pages (from-to)	150-153
Number of pages	4
Journal	Solid State Communications
Volume	137
Issue number	3
DOIs	https://doi.org/10.1016/j.ssc.2005.10.028
State	Published - Jan 2006
Externally published	Yes

All Science Journal Classification (ASJC) codes

General Chemistry
Condensed Matter Physics
Materials Chemistry

Keywords

A. Two-dimensional election systems
D. Metal-insulator transition
E. Surface acoustic waves

Access to Document

10.1016/j.ssc.2005.10.028

Cite this

@article{9446aa5022a94686b94ed5a87a79f14b,

title = "Surface acoustic wave propagation and inhomogeneities in low-density two-dimensional electron systems near the metal-insulator transition",

abstract = "We have measured the surface acoustic wave velocity shift in a GaAs/AlGaAs heterostructure containing a two-dimensional electron system (2DES) in a low-density regime (<1010 cm-2) at zero magnetic field. The interaction of the surface acoustic wave with the 2DES is not well described by a simple model using low-frequency conductivity measurements. We speculate that this conflict is a result of inhomogeneities in the 2DES, which become very important at low density. This has implications for the putative metal-insulator transition in two dimensions.",

keywords = "A. Two-dimensional election systems, D. Metal-insulator transition, E. Surface acoustic waves",

author = "Tracy, {L. A.} and Eisenstein, {J. P.} and Lilly, {M. P.} and Pfeiffer, {L. N.} and West, {K. W.}",

year = "2006",

month = jan,

doi = "10.1016/j.ssc.2005.10.028",

language = "English (US)",

volume = "137",

pages = "150--153",

journal = "Solid State Communications",

issn = "0038-1098",

publisher = "Elsevier Ltd",

number = "3",

}

TY - JOUR

T1 - Surface acoustic wave propagation and inhomogeneities in low-density two-dimensional electron systems near the metal-insulator transition

AU - Tracy, L. A.

AU - Eisenstein, J. P.

AU - Lilly, M. P.

AU - Pfeiffer, L. N.

AU - West, K. W.

PY - 2006/1

Y1 - 2006/1

N2 - We have measured the surface acoustic wave velocity shift in a GaAs/AlGaAs heterostructure containing a two-dimensional electron system (2DES) in a low-density regime (<1010 cm-2) at zero magnetic field. The interaction of the surface acoustic wave with the 2DES is not well described by a simple model using low-frequency conductivity measurements. We speculate that this conflict is a result of inhomogeneities in the 2DES, which become very important at low density. This has implications for the putative metal-insulator transition in two dimensions.

AB - We have measured the surface acoustic wave velocity shift in a GaAs/AlGaAs heterostructure containing a two-dimensional electron system (2DES) in a low-density regime (<1010 cm-2) at zero magnetic field. The interaction of the surface acoustic wave with the 2DES is not well described by a simple model using low-frequency conductivity measurements. We speculate that this conflict is a result of inhomogeneities in the 2DES, which become very important at low density. This has implications for the putative metal-insulator transition in two dimensions.

KW - A. Two-dimensional election systems

KW - D. Metal-insulator transition

KW - E. Surface acoustic waves

UR - http://www.scopus.com/inward/record.url?scp=29144521893&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=29144521893&partnerID=8YFLogxK

U2 - 10.1016/j.ssc.2005.10.028

DO - 10.1016/j.ssc.2005.10.028

M3 - Article

AN - SCOPUS:29144521893

SN - 0038-1098

VL - 137

SP - 150

EP - 153

JO - Solid State Communications

JF - Solid State Communications

IS - 3

ER -

Surface acoustic wave propagation and inhomogeneities in low-density two-dimensional electron systems near the metal-insulator transition

Abstract

All Science Journal Classification (ASJC) codes

Keywords

Access to Document

Other files and links

Fingerprint

Cite this