Proximity electron tunneling spectroscopy I. Experiments on Nb

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

doi:10.1007/BF00115980

Proximity electron tunneling spectroscopy I. Experiments on Nb

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

Applied Physics

Research output: Contribution to journal › Article › peer-review

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 d_N ≤ 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 δ_S(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 language	English (US)
Pages (from-to)	19-50
Number of pages	32
Journal	Journal of Low Temperature Physics
Volume	40
Issue number	1-2
DOIs	https://doi.org/10.1007/BF00115980
State	Published - Jul 1980

ASJC Scopus subject areas

Atomic and Molecular Physics, and Optics
General Materials Science
Condensed Matter Physics

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10.1007/BF00115980

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title = "Proximity electron tunneling spectroscopy I. Experiments on Nb",

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.",

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T1 - Proximity electron tunneling spectroscopy I. Experiments on Nb

AU - Wolf, E. L.

AU - Zasadzinski, John

AU - Osmun, J. W.

AU - Arnold, Gerald B.

PY - 1980/7

Y1 - 1980/7

N2 - 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.

AB - 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.

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Proximity electron tunneling spectroscopy I. Experiments on Nb

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