Thermovoltage mapping of standing electron waves on Au(111) surfaces at low temperatures

被引：11

作者：

Engel, KJ ^{[1
]}

Wenderoth, M ^{[1
]}

Quaas, N ^{[1
]}

Reusch, TCG ^{[1
]}

Sauthoff, K ^{[1
]}

Ulbrich, RG ^{[1
]}

机构：

[1] Univ Gottingen, Inst Phys 4, D-37073 Gottingen, Germany

来源：

PHYSICAL REVIEW B | 2001年 / 63卷 / 16期

关键词：

D O I：

10.1103/PhysRevB.63.165402

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Standing-wave patterns of Au(111) surface electrons in the vicinity of monatornic steps were studied by mapping the thermovoltage across the tunneling gap of a low-temperature scanning tunneling microscope (STM). In contrast to other STM spectroscopic methods, the amplitude of the standing-wave oscillations builds up with distance from the step, up to a maximum. When the temperature T is decreased, the position of this maximum shifts outwards proportional to 1/T. This behavior is explained with an analytical expression and also with numerical calculations of the thermovoltage in the framework of the model of Tersoff and Hamann.

引用

页数：6

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