NATURE OF COUPLED-MODE CONTRIBUTIONS TO HOT-ELECTRON RELAXATION IN SEMICONDUCTORS

被引：40

作者：

DHARMAWARDANA, MWC

机构：

[1] Division of Physics, National Research Council of Canada, Ottawa

来源：

PHYSICAL REVIEW LETTERS | 1991年 / 66卷 / 02期

关键词：

D O I：

10.1103/PhysRevLett.66.197

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The energy flow in a system of hot electrons, hot LO phonons, and a bath of acoustic phonons is studied using nonequilibrium Green functions. In lowest order, Kogan's formula for the energy-loss rate is obtained. When coupled modes are included we find, in sharp contrast to Das Sarma and co-workers, that the energy-loss rate is significantly suppressed by coupled-mode formation and quasiparticlelike modes do not contribute to the energy-loss rate.

引用

收藏

页码：197 / 200

页数：4

相关论文

共 20 条

[1] NONEQUILIBRIUM PHONON EFFECT ON TIME-DEPENDENT RELAXATION OF HOT-ELECTRONS IN SEMICONDUCTOR HETEROJUNCTIONS [J].

CAI, W ;

MARCHETTI, MC ;

LAX, M .

PHYSICAL REVIEW B, 1987, 35 (03) :1369-1372

[2] DYNAMICAL SCREENING IN THE COOLING THEORY OF HIGH-DENSITY ELECTRON-HOLE PLASMAS [J].

COLLET, JH .

PHYSICAL REVIEW B, 1989, 39 (11) :7659-7665

[3] MANY-BODY THEORY OF ENERGY RELAXATION IN AN EXCITED-ELECTRON GAS VIA OPTICAL-PHONON EMISSION [J].

DASSARMA, S ;

JAIN, JK ;

JALABERT, R .

PHYSICAL REVIEW B, 1990, 41 (06) :3561-3571

[4] THE DIELECTRIC FUNCTION OF THE UNIFORM ELECTRON-GAS - APPROXIMATION TO THE HARTREE-FOCK LADDER SERIES [J].

DHARMAWARDANA, MWC ;

TAYLOR, R .

JOURNAL OF PHYSICS F-METAL PHYSICS, 1980, 10 (10) :2217-2236

[5]

GOODNICK SM, 1987, PHYS REV LETT, V59, P716

[6]

JAIN JK, 1988, PHYS REV LETT, V61, P2005, DOI 10.1103/PhysRevLett.61.2005.2

[7] MANY-BODY EFFECTS IN A NONEQUILIBRIUM ELECTRON-LATTICE SYSTEM - COUPLING OF QUASIPARTICLE EXCITATIONS AND LO PHONONS [J].

JAIN, JK ;

JALABERT, R ;

DASSARMA, S .

PHYSICAL REVIEW LETTERS, 1988, 60 (04) :353-356

[8]

KALASHNIKOV VP, 1968, PHYS LETT A, V29, P433

[9] PICOSECOND RAMAN STUDIES OF THE FROHLICH INTERACTION IN SEMICONDUCTOR ALLOYS [J].

KASH, JA ;

JHA, SS ;

TSANG, JC .

PHYSICAL REVIEW LETTERS, 1987, 58 (18) :1869-1872

[10]

KOCEVAR P, 1989, NATO ASI, V206, P235