Proximity electron tunneling spectroscopy I. Experiments on Nb

E. L. Wolf, John Zasadzinski, J. W. Osmun, Gerald B. Arnold

Research output: Contribution to journalArticle

Abstract

A quantitative proximity electron tunneling spectroscopy (PETS) is demonstrated for the study of strong coupling superconductors which do not form suitable insulating oxides for conventional McMillan-Rowell tunneling spectroscopy. Proximity junctions of the form C-Al2O3-Al/S are employed, with Al thickness dN ≤ 100 ». Here S is the superconductor of interest and C is any convenient counterelectrode. The physical basis for the method, experimental techniques, and data obtained from foils of Nb are presented. The results for Nb include the energy-dependent pair potential δS(E), the renormalization function Z(E), effective phonon spectrum α 2F(Ω), electron-phonon coupling constant λ, and Coulomb pseudopotential Μ*. A full discussion of the underlying theory and details of the methods of analysis employed to obtain, in addition, the pair potential of the Al proximity layer are contained in a following paper.

Original languageEnglish (US)
Pages (from-to)19-50
Number of pages32
JournalJournal of Low Temperature Physics
Volume40
Issue number1-2
DOIs
StatePublished - Jul 1980

Fingerprint

Electron tunneling
electron tunneling
Superconducting materials
proximity
Spectroscopy
Oxides
Metal foil
spectroscopy
Experiments
pseudopotentials
Electrons
foils
oxides
electrons
energy

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

Cite this

Wolf, E. L., Zasadzinski, J., Osmun, J. W., & Arnold, G. B. (1980). Proximity electron tunneling spectroscopy I. Experiments on Nb. Journal of Low Temperature Physics, 40(1-2), 19-50. https://doi.org/10.1007/BF00115980

Proximity electron tunneling spectroscopy I. Experiments on Nb. / Wolf, E. L.; Zasadzinski, John; Osmun, J. W.; Arnold, Gerald B.

In: Journal of Low Temperature Physics, Vol. 40, No. 1-2, 07.1980, p. 19-50.

Research output: Contribution to journalArticle

Wolf, EL, Zasadzinski, J, Osmun, JW & Arnold, GB 1980, 'Proximity electron tunneling spectroscopy I. Experiments on Nb', Journal of Low Temperature Physics, vol. 40, no. 1-2, pp. 19-50. https://doi.org/10.1007/BF00115980
Wolf, E. L. ; Zasadzinski, John ; Osmun, J. W. ; Arnold, Gerald B. / Proximity electron tunneling spectroscopy I. Experiments on Nb. In: Journal of Low Temperature Physics. 1980 ; Vol. 40, No. 1-2. pp. 19-50.
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