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Energy-gap spectroscopy of superconductors using a tunneling microscopeA unique scanning tunneling microscope (STM) system has been developed for spectroscopy of the superconducting energy gap. High-resolution control of tunnel current and voltage allows for measurement of superconducting properties at tunnel resistance levels 100-1000 greater than that achieved in prior work. The previously used STM methods for superconductor spectroscopy are compared to those developed for the work reported here. Superconducting energy-gap spectra are reported for three superconductors, Pb, PbBi, and NbN, over a range of tunnel resistance. The measured spectra are compared directly to theory.
Document ID
19870059199
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
doi:10.1063/1.97687
Authors
Le Duc, H. G. (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Kaiser, W. J. (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Stern, J. A. (California Institute of Technology Jet Propulsion Laboratory, Pasadena, United States)
Date Acquired
August 13, 2013
Publication Date
June 29, 1987
Publication Information
Publication: Applied Physics Letters
Volume: 50
ISSN: 0003-6951
Subject Category
Instrumentation And Photography
Accession Number
87A46473
Distribution Limits
Public
Copyright
Other

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