The Nonlinear Effects in 2DEG Conductivity Investigation by an Acoustic Method

I. L. Drichko; A. M. Diakonov; V. D. Kagan; A. M. Kreshchuk; T. A. Polyanskaya; I. G. Savelev; I. Yu Smirnov; A. V. Suslov

doi:10.1002/(SICI)1521-3951(199801)205:1<357::AID-PSSB357>3.0.CO;2-K

The Nonlinear Effects in 2DEG Conductivity Investigation by an Acoustic Method

I. L. Drichko^*
, A. M. Diakonov
, V. D. Kagan
, A. M. Kreshchuk
, T. A. Polyanskaya
, I. G. Savelev
, I. Yu Smirnov
, A. V. Suslov

^*Corresponding author for this work

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

1 Scopus citations

Abstract

The parameters of a two-dimensional electron gas (2DEG) in a GaAs/AlGaAs heterostructure were determined by an acoustic (contactless) method in the delocalized electron region (B ≤ 2.5 T). Nonlinear effects in Surface Acoustic Wave (SAW) absorption by 2DEG are determined by electron heating in the electric field of SAW, which may be described in terms of the electron temperature T_c. The energy relaxation time τ_ε is determined by the scattering at piezoelectric potential of acoustic phonons with strong screening. At different SAW frequencies the heating depends on the relationship between ωτ_ε and 1 and is determined either by the instantaneously changing wave field (ωτ_ε < 1), or by the average wave power (ωτ_ε > 1).

Original language	English
Pages (from-to)	357-361
Number of pages	5
Journal	Physica Status Solidi (B): Basic Research
Volume	205
Issue number	1
DOIs	https://doi.org/10.1002/(SICI)1521-3951(199801)205:1<357::AID-PSSB357>3.0.CO;2-K
State	Published - Jan 1998
Externally published	Yes

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10.1002/(SICI)1521-3951(199801)205:1<357::AID-PSSB357>3.0.CO;2-K

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title = "The Nonlinear Effects in 2DEG Conductivity Investigation by an Acoustic Method",

abstract = "The parameters of a two-dimensional electron gas (2DEG) in a GaAs/AlGaAs heterostructure were determined by an acoustic (contactless) method in the delocalized electron region (B ≤ 2.5 T). Nonlinear effects in Surface Acoustic Wave (SAW) absorption by 2DEG are determined by electron heating in the electric field of SAW, which may be described in terms of the electron temperature Tc. The energy relaxation time τε is determined by the scattering at piezoelectric potential of acoustic phonons with strong screening. At different SAW frequencies the heating depends on the relationship between ωτε and 1 and is determined either by the instantaneously changing wave field (ωτε < 1), or by the average wave power (ωτε > 1).",

author = "Drichko, \{I. L.\} and Diakonov, \{A. M.\} and Kagan, \{V. D.\} and Kreshchuk, \{A. M.\} and Polyanskaya, \{T. A.\} and Savelev, \{I. G.\} and Smirnov, \{I. Yu\} and Suslov, \{A. V.\}",

year = "1998",

month = jan,

doi = "10.1002/(SICI)1521-3951(199801)205:1<357::AID-PSSB357>3.0.CO;2-K",

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AU - Drichko, I. L.

AU - Diakonov, A. M.

AU - Kagan, V. D.

AU - Kreshchuk, A. M.

AU - Polyanskaya, T. A.

AU - Savelev, I. G.

AU - Smirnov, I. Yu

AU - Suslov, A. V.

PY - 1998/1

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N2 - The parameters of a two-dimensional electron gas (2DEG) in a GaAs/AlGaAs heterostructure were determined by an acoustic (contactless) method in the delocalized electron region (B ≤ 2.5 T). Nonlinear effects in Surface Acoustic Wave (SAW) absorption by 2DEG are determined by electron heating in the electric field of SAW, which may be described in terms of the electron temperature Tc. The energy relaxation time τε is determined by the scattering at piezoelectric potential of acoustic phonons with strong screening. At different SAW frequencies the heating depends on the relationship between ωτε and 1 and is determined either by the instantaneously changing wave field (ωτε < 1), or by the average wave power (ωτε > 1).

AB - The parameters of a two-dimensional electron gas (2DEG) in a GaAs/AlGaAs heterostructure were determined by an acoustic (contactless) method in the delocalized electron region (B ≤ 2.5 T). Nonlinear effects in Surface Acoustic Wave (SAW) absorption by 2DEG are determined by electron heating in the electric field of SAW, which may be described in terms of the electron temperature Tc. The energy relaxation time τε is determined by the scattering at piezoelectric potential of acoustic phonons with strong screening. At different SAW frequencies the heating depends on the relationship between ωτε and 1 and is determined either by the instantaneously changing wave field (ωτε < 1), or by the average wave power (ωτε > 1).

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The Nonlinear Effects in 2DEG Conductivity Investigation by an Acoustic Method

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