SUPERCONDUCTIVITY IN THIN TRANSITION-METAL FILMS: ITS SUPPRESSION BY REDUCED DIMENSIONALITY AND LOCALIZATION.

C. L. Fu*, Arthur J Freeman, E. Wimmer, H. J.F. Jansen

*Corresponding author for this work

Research output: Contribution to journalConference article

1 Scopus citations

Abstract

The effects of reduced dimensionality on the superconductivity of thin films - Nb(100) and V(100) - and Ag/V/Ag(100) sandwiches are investigated using the all-electron self-consistent full potential linearized augmented plane wave (FLAPW) method. Results of calculations of the electronic structures are used along with the rigid-ion approximation and McMillan strong coupling theory to calculate the layer-by-layer contribution to the electron-phonon coupling. Despite a high N(E//F) which remains at the surface layer, the electronic contribution to the electron-phonon coupling is found to be strongly suppressed by dimensional constraints. Localization of the surface states and the decrease of p-like electrons at the surface are shown to be behind this suppression. This implies that superconductivity is diminished in reduced dimensional transition metal films.

Original languageEnglish (US)
Pages (from-to)103-107
Number of pages5
JournalPhysica B: Physics of Condensed Matter & C: Atomic, Molecular and Plasma Physics, Optics
Volume135
Issue number1-3
StatePublished - Dec 1 1985
EventProc of the Int Conf on Mater and Mech of Supercond, M2S - Ames, IA, USA
Duration: May 29 1985May 31 1985

ASJC Scopus subject areas

  • Engineering(all)

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