GIANT MANY-BODY ENHANCEMENT OF LOW-TEMPERATURE THERMAL-ELECTRON ACOUSTIC-PHONON COUPLING IN SEMICONDUCTOR QUANTUM WIRES

被引：27

作者：

SENNA, JR ^{[1
]}

DASSARMA, S ^{[1
]}

机构：

[1] IST NACL PESQUISAS ESPACIAIS,BR-12201 SAN JOSE CAMPOS,SP,BRAZIL

来源：

PHYSICAL REVIEW LETTERS | 1993年 / 70卷 / 17期

关键词：

D O I：

10.1103/PhysRevLett.70.2593

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We show that in a semiconductor quantum wire the energy relaxation of the excited one-dimensional electron gas due to acoustic phonon emission is strongly enhanced at low temperatures by a subtle many-body effect arising from the phonon broadening caused by the electron-acoustic-phonon interaction. This broadening opens up a ''virtual'' channel for energy transfer from the electrons to the low energy tail of the phonon spectral function. This peculiarly one-dimensional many-body effect causes a very large enhancement of the power loss over the bare value and restores the Bloch-Gruneisen power law temperature dependence of the energy loss rate at low temperatures.

引用

页码：2593 / 2596

页数：4

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