Experimental evidence for spin-split bands in a one-dimensional chain structure

被引：124

作者：

Barke, I. ^{[1
]}

Zheng, Fan ^{[1
]}

Rugheimer, T. K. ^{[1
]}

Himpsel, F. J. ^{[1
]}

机构：

[1] Univ Wisconsin, Dept Phys, Madison, WI 53706 USA

来源：

PHYSICAL REVIEW LETTERS | 2006年 / 97卷 / 22期

关键词：

D O I：

10.1103/PhysRevLett.97.226405

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Gold atom chains on vicinal Si(111) surfaces exhibit an unusual doublet of half-filled bands, whose origin has remained uncertain. The splitting is identified by angle-resolved photoemission as a spin splitting induced by the spin-orbit interaction (Rashba effect), in agreement with a theoretical prediction by Sanchez-Portal, Riikonen, and Martin. This interaction leads to a characteristic pattern of avoided band crossings at a superlattice zone boundary. Two out of four crossings are avoided, with a minigap E-G=85 meV and a k offset of 0.05 A(-1).

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