Vacuum tunneling of superconducting quasiparticles from atomically sharp scanning tunneling microscope tips

被引：118

作者：

Pan, SH ^{[1
]}

Hudson, EW ^{[1
]}

Davis, JC ^{[1
]}

机构：

[1] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA

来源：

APPLIED PHYSICS LETTERS | 1998年 / 73卷 / 20期

关键词：

D O I：

10.1063/1.122654

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We report on the study of atomically sharp superconducting tips for scanning tunneling microscopy and spectroscopy. The results clearly show vacuum tunneling of superconducting quasiparticles from atomically sharp tips. Observed deviations of the energy gap of the superconducting tip from its bulk value are attributed to the proximity effect. We show that a combination of a superconducting tip and an atomic resolution scanning tunneling microscope provides a means of achieving very high resolution local spectroscopy. We also discuss how this combination paves the way for a number of important applications. (C) 1998 American Institute of Physics. [S0003-6951(98)04446-5].

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页码：2992 / 2994

页数：3

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