Anisotropic pressure effects on superconductivity in Fe1+yTe1−xSx

Kazunori Yamamoto, Teruo Yamazaki, Takayoshi Yamanaka, Daichi Ueta, Hideki Yoshizawa, Hiroshi Yaguchi

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2 Citations (Scopus)

Abstract

We have investigated the uniaxial and hydrostatic pressure effects on superconductivity in Fe1.07Te0.88S0.12 through magnetic susceptibility measurements down to 1.8 K. The superconducting transition temperature Tc is enhanced by out-of-plane pressure (uniaxial pressure along the c-axis); the onset temperature of the superconductivity reaches 11.8 K at 0.4 GPa. In contrast, Tc is reduced by in-plane pressure (uniaxial pressure along the ab-plane) and hydrostatic pressure. Taking into account these results, it is inferred that the superconductivity of Fe1+yTe1xSx is enhanced when the lattice constant c considerably decreases. This implies that the relationship between Tc and the anion height for Fe1+yTe1xSx is similar to that for most iron-based superconductors. We consider the reduction of Tc by hydrostatic pressure to be due to the suppression of spin fluctuations because the system moves away from antiferromagnetic ordering, and the enhancement of Tc by out-of-plane pressure to be due to the anion height effect on Tc.

Original languageEnglish
Article number054705
JournalJournal of the Physical Society of Japan
Volume87
Issue number5
DOIs
Publication statusPublished - 2018 Jan 1

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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