Decoherence effects in propagation of optically generated electron-hole pairs in image potential states

被引:19
作者
Gumhalter, B
Petek, H
机构
[1] Univ Zagreb, Inst Phys, Zagreb 10001, Croatia
[2] Hitachi Ltd, Adv Res Lab, Hatoyama, Saitama 3500395, Japan
基金
美国国家科学基金会;
关键词
copper; electron density excitation spectra calculations; Green's function methods; low index single crystal surfaces; metallic surfaces; photoelectron emission; semi-empirical models and model calculations; visible/ultraviolet absot ption spectroscopy;
D O I
10.1016/S0039-6028(99)01037-7
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
We discuss some many-body aspects of optically induced electronic transitions taking place in the first step of two-photon photoemission from Cu(1 1 1) surfaces. Transient and decoherence effects associated with the creation and spatio-temporal propagation of an electron-hole pair generated in the Shockley occupied surface state and image potential bands of the surface image potential (IP-SS 'exciton') are assessed by combining the effective model Hamiltonian approach with the formalism of nonadiabatic response. (C) 2000 Elsevier Science B.V. All rights reserved.
引用
收藏
页码:195 / 208
页数:14
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