Nonohmic conductance and mechanisms of energy relaxation in 2D electron gas in GaAs/InGaAs/GaAs heterostructures / Sherstobitov AA,Min'kov GM,Rut OE,Germanenko AV,Zvonkov BN // SEMICONDUCTORS. - 2005. - V. 39, l. 2. - P. 221-225.

ISSN/EISSN:

1063-7826 / нет данных

Type:

Article

Abstract:

The effects of heating 2D electron gas in GaAs/InGaAs/GaAs structures at temperatures of 0.4-4 K and electron densities of (1.5-6) x 10(15) m(-2) are studied. For the entire range of temperatures and densities studied, the rate of energy relaxation agrees well with theoretical predictions of the energy relaxation via electron scattering at the piezoelectric and deformation potential of acoustic phonons. It is shown that the widely used analytical expressions for energy relaxation rate, which were obtained in low- and high-temperature limits, are applicable only when the relations between the Fermi quasi-momentum and the momentum of thermal phonons are strictly observed. It is shown that the dependence of the energy relaxation rate on the electron density is a nonmonotonic function. For example, at the lattice temperature of 1.4 K, it initially increases as the electron density decreases to n = 2.5 x 10(15) m(-2), but then starts to decrease as the density decreases further. (C) 2005 Pleiades Publishing, Inc.

Author keywords:

QUANTUM-WELL; LOSS RATES; GAAS; TEMPERATURE

DOI:

10.1134/1.1864203

Web of Science ID:

ISI:000227185400012

Соавторы в МНС:

Другие поля

Поле	Значение
Publisher	AMER INST PHYSICS
Address	CIRCULATION \& FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA
Language	English
Keywords-Plus	QUANTUM-WELL; LOSS RATES; GAAS; TEMPERATURE
Research-Areas	Physics
Web-of-Science-Categories	Physics, Condensed Matter
Author-Email	Grigori.Minkov@usu.ru
ResearcherID-Numbers	Minkov, Grigory/K-3855-2013 Sherstobitov, Andrey/K-3838-2013
ORCID-Numbers	Minkov, Grigory/0000-0001-8090-5309 Sherstobitov, Andrey/0000-0001-9267-4181
Number-of-Cited-References	13
Journal-ISO	Semiconductors
Doc-Delivery-Number	899ZT