Quantum-size effects in photoemission from ultra-thin films: Theory and application to Cu-films on fcc-Co(001)

被引：10

作者：

Henk, J ^{[1
]}

Johansson, B ^{[1
]}

机构：

[1] Uppsala Univ, Dept Phys, Condensed Matter Theory Grp, S-75121 Uppsala, Sweden

来源：

JOURNAL OF ELECTRON SPECTROSCOPY AND RELATED PHENOMENA | 1999年 / 105卷 / 2-3期

关键词：

angle-resolved photoemission; ultra-thin films; quantum-well states;

D O I：

10.1016/S0368-2048(99)00034-1

中图分类号：

O433 [光谱学];

学科分类号：

0703 ; 070302 ;

摘要：

We report on detailed calculations of quantum-size effects on the electronic structure of the valence-band regime and their manifestation in photoemission. Model calculations reveal the basic features of photoemission from quantum-well states (QWS). First, emission from QWS shows intensity variations with photon energy which is similar to that of semi-infinite systems, despite the discrete binding energies of the QWS. Second, conservation of the wave-vector component normal to the surface is directly related to the film thickness. Numerical calculations within the relativistic one-step model of photoemission show that these effects should be observable in 'real' systems. This is demonstrated to be the case for Cu films on fcc-Co(001). (C) 1999 Elsevier Science B.V. All rights reserved.

引用

页码：187 / 196

页数：10

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