Tunneling spectroscopy of Stark-shifted image potential states on Cu and Au surfaces

被引：59

作者：

Dougherty, D. B.

Maksymovych, P.

Lee, J.

Feng, M.

Petek, H.

Yates, J. T., Jr. ^{[1
]}

机构：

[1] Univ Pittsburgh, Dept Chem, Ctr Surface Sci, Pittsburgh, PA 15260 USA

[2] Univ Pittsburgh, Dept Phys, Pittsburgh, PA 15260 USA

来源：

PHYSICAL REVIEW B | 2007年 / 76卷 / 12期

关键词：

D O I：

10.1103/PhysRevB.76.125428

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Using low-temperature scanning tunneling microscopy (STM) distance-voltage characteristics at constant current are measured on Cu(111), Cu(110), Au(111), and Au(100) surfaces. Resonant tunneling features are observed that arise from image potential states distorted by the strong electric field of the STM tip. Distance-voltage characteristics are measured over a wide range of current setpoints and the energetic position and width of the resonant features show a significant dependence on this parameter. The lowest energy feature is found to be nearly independent of STM tip condition, while higher energy resonances show substantial tip dependence. The results are discussed and compared with recent calculations.

引用

页数：9

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