Local detection of spin-orbit splitting by scanning tunneling spectroscopy

被引：81

作者：

Ast, Christian R. ^{[1
]}

Wittich, Gero

Wahl, Peter

Vogelgesang, Ralf

Pacile, Daniela

Falub, Mihaela C.

Moreschini, Luca

Papagno, Marco

Grioni, Marco

Kern, Klaus

机构：

[1] Ecole Polytech Fed Lausanne, Inst Phys Nanostruct, CH-1015 Lausanne, Switzerland

[2] Max Planck Inst Festkorperforsch, D-70569 Stuttgart, Germany

[3] Univ Calabria, I-87036 Cosenza, Italy

[4] Ist Nazl Fis Nucl, I-87036 Cosenza, Italy

来源：

PHYSICAL REVIEW B | 2007年 / 75卷 / 20期

关键词：

D O I：

10.1103/PhysRevB.75.201401

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We demonstrate that the spin-orbit coupling of two-dimensional surface states can be detected locally by scanning-tunneling spectroscopy (STS). The spin splitting of the surface state induces a singularity in the local density of states which can be detected as a distinct peak in the differential conductance spectrum. From the STS spectrum we can determine the Rashba energy as a measure of the strength of the spin splitting. Its detection and imaging are demonstrated for the surface alloys Bi and Pb on Ag(111), which exhibit particularly large spin-split band structures. The influence of the spin splitting on the surface-state STS spectra of close-packed noble metal surfaces is also discussed.

引用

页数：4

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