High pressure effect on the superconductivity in VN

Bosen Wang, Kazuyuki Matsubayashi, Yoshiya Uwatoko, Kenya Ohgushi

Research output: Contribution to journalArticle

Abstract

We revisited the superconductivity in a vanadium-based superconductor VNx with a special focus on its high-pressure effect. We found that the electronic specific heat at low temperature follows a single gap BCS-type function, indicating the s-wave symmetry of superconducting gap. We also revealed that the superconducting transition temperature (Tc) enhances as the pressure increases up to 8 GPa, giving a positive differential pressure coefficient of 0.09K/GPa. The enhancement of Tc was discussed in terms of the suppressed spin fluctuations, and the phonon softening.

Original languageEnglish
Article numbere104706
Journaljournal of the physical society of japan
Volume84
Issue number10
DOIs
Publication statusPublished - 2015 Oct 15

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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