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

S. H. Pan, E. W. Hudson, J. C. Davis

Research output: Contribution to journalArticle

103 Scopus citations

Abstract

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.

Original languageEnglish (US)
Pages (from-to)2992-2994
Number of pages3
JournalApplied Physics Letters
Volume73
Issue number20
DOIs
StatePublished - Dec 1 1998

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

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