Terahertz transmission characteristics of high-mobility GaAs and InAs two-dimensional-electron-gas systems

N. A. Kabir; Y. Yoon; J. R. Knab; J. Y. Chen; A. G. Markelz; J. L. Reno; Y. Sadofyev; S. Johnson; Y. H. Zhang; J. P. Bird

doi:10.1063/1.2357605

Terahertz transmission characteristics of high-mobility GaAs and InAs two-dimensional-electron-gas systems

N. A. Kabir
, Y. Yoon
, J. R. Knab
, J. Y. Chen
, A. G. Markelz
, J. L. Reno
, Y. Sadofyev
, S. Johnson
, Y. H. Zhang
, J. P. Bird

SUNY Buffalo
Sandia National Laboratories, New Mexico

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

20 Scopus citations

Abstract

Frequency-dependent complex conductivity of high-mobility GaAs and InAs two-dimensional-electron-gas (2DEG) systems is studied by terahertz time domain spectroscopy. Determining the momentum relaxation time from a Drude model, the authors find a lower value than that from dc measurements, particularly at high frequencies/low temperatures. These deviations are consistent with the ratio τ _t/τ _q, where τ _q is the full scattering time. This suggests that small-angle scattering leads to weaker heating of 2DEGs at low temperatures than expected from dc mobility.

Original language	English
Article number	132109
Journal	Applied Physics Letters
Volume	89
Issue number	13
DOIs	https://doi.org/10.1063/1.2357605
State	Published - 2006

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title = "Terahertz transmission characteristics of high-mobility GaAs and InAs two-dimensional-electron-gas systems",

abstract = "Frequency-dependent complex conductivity of high-mobility GaAs and InAs two-dimensional-electron-gas (2DEG) systems is studied by terahertz time domain spectroscopy. Determining the momentum relaxation time from a Drude model, the authors find a lower value than that from dc measurements, particularly at high frequencies/low temperatures. These deviations are consistent with the ratio τ t/τ q, where τ q is the full scattering time. This suggests that small-angle scattering leads to weaker heating of 2DEGs at low temperatures than expected from dc mobility.",

author = "Kabir, \{N. A.\} and Y. Yoon and Knab, \{J. R.\} and Chen, \{J. Y.\} and Markelz, \{A. G.\} and Reno, \{J. L.\} and Y. Sadofyev and S. Johnson and Zhang, \{Y. H.\} and Bird, \{J. P.\}",

year = "2006",

doi = "10.1063/1.2357605",

language = "English",

volume = "89",

journal = "Applied Physics Letters",

issn = "0003-6951",

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T1 - Terahertz transmission characteristics of high-mobility GaAs and InAs two-dimensional-electron-gas systems

AU - Kabir, N. A.

AU - Yoon, Y.

AU - Knab, J. R.

AU - Chen, J. Y.

AU - Markelz, A. G.

AU - Reno, J. L.

AU - Sadofyev, Y.

AU - Johnson, S.

AU - Zhang, Y. H.

AU - Bird, J. P.

PY - 2006

Y1 - 2006

N2 - Frequency-dependent complex conductivity of high-mobility GaAs and InAs two-dimensional-electron-gas (2DEG) systems is studied by terahertz time domain spectroscopy. Determining the momentum relaxation time from a Drude model, the authors find a lower value than that from dc measurements, particularly at high frequencies/low temperatures. These deviations are consistent with the ratio τ t/τ q, where τ q is the full scattering time. This suggests that small-angle scattering leads to weaker heating of 2DEGs at low temperatures than expected from dc mobility.

AB - Frequency-dependent complex conductivity of high-mobility GaAs and InAs two-dimensional-electron-gas (2DEG) systems is studied by terahertz time domain spectroscopy. Determining the momentum relaxation time from a Drude model, the authors find a lower value than that from dc measurements, particularly at high frequencies/low temperatures. These deviations are consistent with the ratio τ t/τ q, where τ q is the full scattering time. This suggests that small-angle scattering leads to weaker heating of 2DEGs at low temperatures than expected from dc mobility.

UR - https://www.scopus.com/pages/publications/33749260489

U2 - 10.1063/1.2357605

DO - 10.1063/1.2357605

M3 - Article

AN - SCOPUS:33749260489

SN - 0003-6951

VL - 89

JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 13

M1 - 132109

ER -

Terahertz transmission characteristics of high-mobility GaAs and InAs two-dimensional-electron-gas systems

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