Giant spin splitting through surface alloying

被引：711
作者：
Ast, Christian R. [1 ]
Henk, Juergen
Ernst, Arthur
Moreschini, Luca
Falub, Mihaela C.
Pacile, Daniela
Bruno, Patrick
Kern, Klaus
Grioni, Marco
机构：
[1] Max Planck Inst Festkorperforsch, D-70569 Stuttgart, Germany
[2] Ecole Polytech Fed Lausanne, Inst Phys Nanostruct, CH-1015 Lausanne, Switzerland
[3] Max Planck Inst Mikrostrukturphys, D-06120 Halle, Saale, Germany
来源：
PHYSICAL REVIEW LETTERS | 2007年 / 98卷 / 18期
关键词：
D O I：
10.1103/PhysRevLett.98.186807
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
The long-range ordered surface alloy Bi/Ag(111) is found to exhibit a giant spin splitting of its surface electronic structure due to spin-orbit coupling, as is determined by angle-resolved photoelectron spectroscopy. First-principles electronic structure calculations fully confirm the experimental findings. The effect is brought about by a strong in-plane gradient of the crystal potential in the surface layer, in interplay with the structural asymmetry due to the surface-potential barrier. As a result, the spin polarization of the surface states is considerably rotated out of the surface plane.
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页数：4
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