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

共 36 条

[1]

Bachrach R. Z., 1992, ADV SURFACE INTERFAC, V1

[2] ON THE HISTORY OF PHOTOEMISSION [J].

BONZEL, HP ;

KLEINT, C .

PROGRESS IN SURFACE SCIENCE, 1995, 49 (02) :107-153

[3] The theory of angle-resolved ultraviolet photoemission and its applications to ordered materials [J].

Braun, J .

REPORTS ON PROGRESS IN PHYSICS, 1996, 59 (10) :1267-1338

[4] Magnetic and finite size effects in Cu films on Co(100) [J].

Carbone, C ;

Vescovo, E ;

Klasges, R ;

Sarma, DD ;

Eberhardt, W .

SOLID STATE COMMUNICATIONS, 1996, 100 (11) :749-753

[5] EXCHANGE SPLIT QUANTUM-WELL STATES OF A NOBLE-METAL FILM ON A MAGNETIC SUBSTRATE [J].

CARBONE, C ;

VESCOVO, E ;

RADER, O ;

GUDAT, W ;

EBERHARDT, W .

PHYSICAL REVIEW LETTERS, 1993, 71 (17) :2805-2808

[6]

CARDONA M, 1978, TOPICS APPL PHYSICS, V26

[7] Experimental and model theoretical dispersions of unoccupied metallic quantum well states in the Cu/fccCo/Cu(100) system [J].

Curti, FG ;

Danese, A ;

Bartynski, RA .

PHYSICAL REVIEW LETTERS, 1998, 80 (10) :2213-2216

[8] Interlayer exchange coupling and interface reflectivities in Fe/Cu, Co/Cu and Ni/Cu(001) layers [J].

Dederichs, PH ;

Wildberger, K ;

Zeller, R .

PHYSICA B-CONDENSED MATTER, 1997, 237 :239-243

[9] Magnetic dichroism in valence-band photoemission from Co/Cu(001): Experiment and theory [J].

Fanelsa, A ;

Kisker, E ;

Henk, J ;

Feder, R .

PHYSICAL REVIEW B, 1996, 54 (04) :2922-2930

[10]

Feder R, 1985, ADV SERIES SURFACE S

← 1 2 3 4 →