Secondary emission from W(110) excited by spin-polarized electrons

被引：9
作者：
Samarin, S
Artamonov, OM
Sergeant, AD
Williams, JF
机构：
[1] Univ Western Australia, Ctr Atom Mol & Surface Phys, Perth, WA 6009, Australia
[2] St Petersburg State Univ, Phys Res Inst, St Petersburg 198904, Russia
来源：
SURFACE SCIENCE | 2005年 / 579卷 / 2-3期
基金：
澳大利亚研究理事会;
关键词：
secondary electron emission; spin-polarized electrons; tungsten;
D O I：
10.1016/j.susc.2005.01.046
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：
Energy distribution curves (EDC) of secondary electrons from W(I 10) were measured for spin-up (I) and spin-down (I-) polarization of the incident beam. The intensity asymmetry, defined as A = (I+ - I-)/(I+ + I-), for a certain experimental geometry was measured as large as 7%. This asymmetry was explained in terms of a "spin-filter" effect. The model assumes that the secondary electrons excited by spin-polarized primary electrons are spin-polarized inside the solid. On the way to the vacuum they undergo spin-orbit interaction on the surface barrier that provides the spin-dependent and energy selective transmission through the surface. (c) 2005 Elsevier B.V. All rights reserved.
引用
收藏
页码：166 / 174
页数：9
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