Three-Dimensional Spin Rotations at the Fermi Surface of a Strongly Spin-Orbit Coupled Surface System

被引：53

作者：

Hoepfner, P. ^{[1
]}

Schaefer, J. ^{[1
]}

Fleszar, A. ^{[2
]}

Dil, J. H. ^{[3
,4
]}

Slomski, B. ^{[3
,4
]}

Meier, F. ^{[3
,4
]}

Loho, C. ^{[1
]}

Blumenstein, C. ^{[1
]}

Patthey, L. ^{[3
]}

Hanke, W. ^{[2
]}

Claessen, R. ^{[1
]}

机构：

[1] Univ Wurzburg, Inst Phys, D-97074 Wurzburg, Germany

[2] Univ Wurzburg, Inst Theoret Phys & Astrophys, D-97074 Wurzburg, Germany

[3] Paul Scherrer Inst, Swiss Light Source, CH-5232 Villigen, Switzerland

[4] Univ Zurich, Inst Phys, CH-8057 Zurich, Switzerland

来源：

PHYSICAL REVIEW LETTERS | 2012年 / 108卷 / 18期

关键词：

DIFFRACTION;

D O I：

10.1103/PhysRevLett.108.186801

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The spin texture of the metallic two-dimensional electron system (root 3 x root 3)-Au/Ge(111) is revealed by fully three-dimensional spin-resolved photoemission, as well as by density functional calculations. The large hexagonal Fermi surface, generated by the Au atoms, shows a significant splitting due to spin-orbit interactions. The planar components of the spin exhibit a helical character, accompanied by a strong out-of-plane spin component with alternating signs along the six Fermi surface sections. Moreover, in-plane spin rotations toward a radial direction are observed close to the hexagon corners. Such a threefold-symmetric spin pattern is not described by the conventional Rashba model. Instead, it reveals an interplay with Dresselhaus-like spin-orbit effects as a result of the crystalline anisotropies.

引用

页数：5

共 31 条

[1] Local detection of spin-orbit splitting by scanning tunneling spectroscopy [J].