POLAR-OPTIC PHONONS AND HIGH-FIELD ELECTRON-TRANSPORT IN CYLINDRICAL GAAS/ALAS QUANTUM WIRES

被引：91
|
作者：
WANG, XF [1 ]
LEI, XL [1 ]
机构：
[1] CHINA CTR ADV SCI & TECHNOL, WORLD LAB, BEIJING 100080, PEOPLES R CHINA
来源：
PHYSICAL REVIEW B | 1994年 / 49卷 / 07期
关键词：
D O I：
10.1103/PhysRevB.49.4780
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Linear and nonlinear electron transport in GaAs/AlAs cylindrical quantum wires is investigated with the help of the balance-equation transport theory. Confined phonons, surface phonons, and their Frohlich couplings with electrons in these quasi-one-dimensional electron-phonon systems are described using the dielectric continuum, hydrodynamic continuum, and Huang-Zhu optic-phonon models, respectively. Both intrasubband and intersubband transitions of up to 21 electron subbands are taken into account in the numerical calculation. The comparison of the results from these three models with those obtained by using bulk phonon approximation shows that the bulk phonon approximation is accurate enough to describe the Frohlich interaction when calculating the linear and nonlinear electron transport even in ultrafine GaAs/AlAs quantum wires.
引用
收藏
页码：4780 / 4789
页数：10
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