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, Shane Johnson, Yong-Hang Zhang, J. P. Bird

Research output: Contribution to journalArticle

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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 tq, 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 languageEnglish (US)
Article number132109
JournalApplied Physics Letters
Volume89
Issue number13
DOIs
StatePublished - 2006

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electron gas
scattering
relaxation time
deviation
momentum
conductivity
heating
spectroscopy

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

Cite this

Kabir, N. A., Yoon, Y., Knab, J. R., Chen, J. Y., Markelz, A. G., Reno, J. L., ... Bird, J. P. (2006). Terahertz transmission characteristics of high-mobility GaAs and InAs two-dimensional-electron-gas systems. Applied Physics Letters, 89(13), [132109]. https://doi.org/10.1063/1.2357605

Terahertz transmission characteristics of high-mobility GaAs and InAs two-dimensional-electron-gas systems. / Kabir, N. A.; Yoon, Y.; Knab, J. R.; Chen, J. Y.; Markelz, A. G.; Reno, J. L.; Sadofyev, Y.; Johnson, Shane; Zhang, Yong-Hang; Bird, J. P.

In: Applied Physics Letters, Vol. 89, No. 13, 132109, 2006.

Research output: Contribution to journalArticle

Kabir, N. A. ; Yoon, Y. ; Knab, J. R. ; Chen, J. Y. ; Markelz, A. G. ; Reno, J. L. ; Sadofyev, Y. ; Johnson, Shane ; Zhang, Yong-Hang ; Bird, J. P. / Terahertz transmission characteristics of high-mobility GaAs and InAs two-dimensional-electron-gas systems. In: Applied Physics Letters. 2006 ; Vol. 89, No. 13.
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