Electron tunneling spectroscopy of superconducting A15 V-Ga alloy films

S. J. Bending, M. R. Beasley, E. L. Wolf

Research output: Contribution to journalArticle

Abstract

The results of a tunneling study of the high-Tc, A15 superconductor V3Ga are presented. The superconducting electron-phonon interaction spectral function ±2F() is obtained for a set of samples with compositions spanning stoichiometry. These results are of particular interest since V3Ga is unusual among the high-Tc, A15 superconductors in that single-phase material can be formed on either side of stoichiometry. The results demonstrate that increased weight of ±2F() (or so-called mode softening) occurs at low energies as stoichiometry is approached either from above or below. Concomitantly log is found to show a minimum at stoichiometry. Interestingly, although Tc is a symmetric function of composition around stoichiometry, log is asymmetric. Hence, some other factor beyond mode softening is playing a significant factor in the systematics of the high Tcs exhibited by this superconductor as a function of composition.

Original languageEnglish (US)
Pages (from-to)115-119
Number of pages5
JournalPhysical Review B
Volume35
Issue number1
DOIs
StatePublished - 1987

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Electron tunneling
electron tunneling
Stoichiometry
stoichiometry
Spectroscopy
Superconducting materials
spectroscopy
softening
Chemical analysis
Electron-phonon interactions
electron phonon interactions

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Electron tunneling spectroscopy of superconducting A15 V-Ga alloy films. / Bending, S. J.; Beasley, M. R.; Wolf, E. L.

In: Physical Review B, Vol. 35, No. 1, 1987, p. 115-119.

Research output: Contribution to journalArticle

Bending, S. J. ; Beasley, M. R. ; Wolf, E. L. / Electron tunneling spectroscopy of superconducting A15 V-Ga alloy films. In: Physical Review B. 1987 ; Vol. 35, No. 1. pp. 115-119.
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