LOW-TEMPERATURE ENERGY RELAXATION IN ALXGA1-XAS GAAS HETEROJUNCTIONS

被引:24
作者
KAWAMURA, T
DASSARMA, S
JALABERT, R
JAIN, JK
机构
[1] YALE UNIV,DEPT APPL PHYS,NEW HAVEN,CT 06520
[2] SUNY STONY BROOK,DEPT PHYS,STONY BROOK,NY 11794
来源
PHYSICAL REVIEW B | 1990年 / 42卷 / 08期
关键词
D O I
10.1103/PhysRevB.42.5407
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
The total average energy-loss rate of a two-dimensional electron gas in an AlxGa1-xAs/GaAs heterojunction at low temperatures is calculated for various densities and lattice temperatures. We take into account the inelastic scattering mechanisms due to acoustic phonons via deformation potential and piezoelectric coupling, and low-energy phonon modes associated with the coupling of quasiparticle excitations to the LO phonons. At high-carrier densities we show that the inclusion of these new phonon modes can explain the experimental data of Manion et al. [Phys. Rev. B 35, 9203 (1987)] for the energy-loss rates at low temperatures without using an enhanced value of the deformation-potential constant. © 1990 The American Physical Society.
引用
收藏
页码:5407 / 5410
页数:4
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