Electron-phonon interaction and relaxation time in graphite

被引：67

作者：

Jiang, J ^{[1
]}

Saito, R

Grüneis, A

Dresselhaus, G

Dresselhaus, MS

机构：

[1] Tohoku Univ, Dept Phys, Sendai, Miyagi 9808578, Japan

[2] JST, CREST, Sendai, Miyagi 9808578, Japan

[3] MIT, Francis Bitter Natl Magnet Lab, Cambridge, MA 02139 USA

[4] MIT, Dept Phys, Cambridge, MA 02139 USA

[5] MIT, Dept Elect Engn & Comp Sci, Cambridge, MA 02139 USA

来源：

CHEMICAL PHYSICS LETTERS | 2004年 / 392卷 / 4-6期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1016/j.cplett.2004.05.097

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The electron-phonon (e-ph) interaction and the relaxation time of photo-excited electrons are calculated in graphite within the tight-binding scheme. The e-ph matrix element thus obtained, shows anisotropy in k-space. The calculated relaxation time is of the same order of magnitude as the experimental one. Moreover, below an energy close to the Fermi energy, the absorption rate exceeds the emission rate, which indicates that graphite can emit far infra-red electro-magnetic waves by absorbing heat. We also compare this result with Planck's formula for black-body radiation. (C) 2004 Elsevier B.V. All rights reserved.

引用

页码：383 / 389

页数：7

共 24 条

[1] STATIC CONDUCTIVITY AND SUPERCONDUCTIVITY OF CARBON NANOTUBES - RELATIONS BETWEEN TUBES AND SHEETS [J].