Unoccupied surface state on Pt(111) revealed by scanning tunneling spectroscopy -: art. no. 193406

被引：47

作者：

Wiebe, J ^{[1
]}

Meier, F

Hashimoto, K

Bihlmayer, G

Blügel, S

Ferriani, P

Heinze, S

Wiesendanger, R

机构：

[1] Univ Hamburg, Inst Appl Phys, D-20355 Hamburg, Germany

[2] Forschungszentrum Julich, Inst Festkorperforsch, D-52425 Julich, Germany

来源：

PHYSICAL REVIEW B | 2005年 / 72卷 / 19期

关键词：

D O I：

10.1103/PhysRevB.72.193406

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We measured the dispersion of an unoccupied surface state on Pt(111) by imaging scattering states at point defects and step edges using scanning tunneling spectroscopy. By comparison to first-principles electronic structure calculations the state is assigned to an sp-derived surface band at the lower edge of the projected bulk band gap. In dI/dV(V) curves, the onset of the surface-state band appears as a rather broad feature. Its shape results from two spin-orbit split branches with nearly linear dispersion, one of them merging into bulk states at higher energies.

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页数：4

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