TY - JOUR T1 - Terahertz transmission characteristics of high-mobility GaAs and InAs two-dimensional-electron-gas systems JF - Applied Physics Letters Y1 - 2006 A1 - Kabir, N. A. A1 - Yoon, Y. A1 - Knab, J. R. A1 - Chen, J. Y. A1 - Markelz, A. G. A1 - Reno, J. L. A1 - Sadofyev, Y. A1 - Johnson, S. A1 - Zhang, Y. H. A1 - Bird, J. P. KW - field-effect transistors KW - photoconductivity KW - Physics KW - plasma-waves KW - radiation KW - resonant detection KW - subterahertz 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 tau(t)/tau(q,) where tau(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 mobilit9y. (c) 2006 American Institute of Physics.

VL - 89 SN - 0003-6951 N1 - ISI Document Delivery No.: 089JE
Times Cited: 18
Cited Reference Count: 16
Cited References:
ANDO T, 1982, REV MOD PHYS, V54, P437, DOI 10.1103/RevModPhys.54.437
ANDO T, 1989, HIGH MAGNETIC FIELDS, V2, P164
Ashcroft NW, 1976, SOLID STATE PHYS, P1
Beard MC, 2000, PHYS REV B, V62, P15764, DOI 10.1103/PhysRevB.62.15764
Cerne J, 2000, PHYS REV B, V61, P8133, DOI 10.1103/PhysRevB.61.8133
COLERIDGE PT, 1991, PHYS REV B, V44, P3793, DOI 10.1103/PhysRevB.44.3793
Dorozhkin PS, 2005, APPL PHYS LETT, V87, DOI 10.1063/1.2035883
Knap W, 2002, APPL PHYS LETT, V81, P4637, DOI 10.1063/1.1525851
Knap W, 2002, APPL PHYS LETT, V80, P3433, DOI 10.1063/1.1473685
Kukushkin IV, 2005, APPL PHYS LETT, V86, DOI 10.1063/1.1856143
MADELUNG O, 1996, SEMICONDUCTORS BASIC, P109
MCKNIGHT SW, 1987, INFRARED PHYS, V27, P327, DOI 10.1016/0020-0891(87)90074-1
Peralta XG, 2002, APPL PHYS LETT, V81, P1627, DOI 10.1063/1.1497433
Sadofyev YG, 2002, APPL PHYS LETT, V81, P1833, DOI 10.1063/1.1504882
Shaner EA, 2005, APPL PHYS LETT, V87, DOI 10.1063/1.2128057
ZAWADZKI W, 1974, ADV PHYS, V23, P435, DOI 10.1080/00018737400101371
Kabir, N. A. Yoon, Y. Knab, J. R. Chen, J. -Y. Markelz, A. G. Reno, J. L. Sadofyev, Y. Johnson, S. Zhang, Y. -H. Bird, J. P.
Bird, Jonathan P/G-4068-2010
Bird, Jonathan P/0000-0002-6966-9007; Markelz, Andrea/0000-0003-0443-4319
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Amer inst physics
Melville JO - Appl. Phys. Lett.Appl. Phys. Lett. ER -