Giant Out-of-Plane Spin Component and the Asymmetry of Spin Polarization in Surface Rashba States of Bismuth Thin Film

被引：86

作者：

Takayama, A. ^{[1
]}

Sato, T. ^{[1
]}

Souma, S. ^{[2
]}

Takahashi, T. ^{[1
,2
]}

机构：

[1] Tohoku Univ, Dept Phys, Sendai, Miyagi 9808578, Japan

[2] Tohoku Univ, WPI Res Ctr, Adv Inst Mat Res, Sendai, Miyagi 9808577, Japan

来源：

PHYSICAL REVIEW LETTERS | 2011年 / 106卷 / 16期

关键词：

RESOLVED PHOTOEMISSION; AU(111); BAND;

D O I：

10.1103/PhysRevLett.106.166401

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We have performed high-resolution spin-and angle-resolved photoemission spectroscopy of bismuth thin film on Si(111) to investigate the spin structure of surface states. Unlike the conventional Rashba splitting, the magnitude of the in-plane spin polarization is asymmetric between the two elongated surface hole pockets across the zone center. Moreover, we uncovered a giant out-of-plane spin polarization as large as the in-plane counterpart which switches the sign across the (Gamma) over bar-(M) over bar line. We discuss the present finding in terms of the symmetry breaking and the many-body effects.

引用

页数：4

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