Discrepancy between theory and measurement of superconducting vanadium

X. H. Zheng, D. G. Walmsley

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

We have extracted consistent phonon dispersion information out of rather inconsistent vanadium x-ray scattering data from synchrotron and vacuum tube sources. With this and a new theoretical approach we have made firm predictions for the tunnelling conductance of superconducting vana- dium; it is in unusually poor agreement with experimentally measured values. We argue that the problem lies in the experimental measurement rather than the theory. The preparation of a suitable high quality tunnel barrier on vanadium represents an outstanding challenge.
Original languageEnglish
Pages (from-to)41-48
Number of pages8
JournalPhysica C: Superconductivity and its Applications
Volume515
Early online date28 May 2015
DOIs
Publication statusPublished - Aug 2015

Keywords

  • vanadium, phonons, electron pairing, coulomb pseudopotential, superconductivity prediction

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