Direct Observation of Interband Spin-Orbit Coupling in a Two-Dimensional Electron System

被引：51

作者：

Bentmann, Hendrik ^{[1
,2
]}

Abdelouahed, Samir ^{[3
]}

Mulazzi, Mattia ^{[1
,2
]}

Henk, Juergen ^{[4
]}

Reinert, Friedrich ^{[1
,2
]}

机构：

[1] Univ Wurzburg Hubland, Rontgen Res Ctr Complex Mat RCCM, D-97074 Wurzburg, Germany

[2] Karlsruhe Inst Technol KIT, Gemeinschaftslabor Nanoanalyt, D-76021 Karlsruhe, Germany

[3] Texas A&M Univ Qatar, Doha, Qatar

[4] Univ Halle Wittenberg, Inst Phys Theoret Phys, D-06099 Halle, Saale, Germany

来源：

PHYSICAL REVIEW LETTERS | 2012年 / 108卷 / 19期

关键词：

PHOTOEMISSION; TRANSISTOR; DICHROISM; SURFACE;

D O I：

10.1103/PhysRevLett.108.196801

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report the direct observation of interband spin-orbit (SO) coupling in a two-dimensional (2D) surface electron system, in addition to the anticipated Rashba spin splitting. Using angle-resolved photoemission experiments and first-principles calculations on Bi-Ag-Au heterostructures, we show that the effect strongly modifies the dispersion as well as the orbital and spin character of the 2D electronic states, thus giving rise to considerable deviations from the Rashba model. The strength of the interband SO coupling is tuned by the thickness of the thin film structures.

引用

页数：5

共 33 条

[31] Observation of a large-gap topological-insulator class with a single Dirac cone on the surface [J].