Pressure effects on FeSe family superconductors
Yoshikazu Mizuguchi, Fumiaki Tomioka, Keita Deguchi, Shunsuke Tsuda,, Takahide Yamaguchi, Yoshihiko Takano
TL;DR
This study explores how physical pressure influences the superconducting transition temperature in FeSe-based compounds, revealing different behaviors in Tc under pressure and discussing the relation to chemical pressure effects.
Contribution
It provides new insights into the pressure dependence of Tc in FeSe superconductors and compares physical and chemical pressure effects.
Findings
Tc in FeSe0.8S0.2 shows a dome-shaped dependence on pressure.
Tc in FeSe0.25Te0.75 increases linearly with pressure.
Pressure effects differ between chemical substitutions and physical pressure.
Abstract
We investigated the pressure effects on the FeSe superconductor and the related compounds. Pressure dependence of superconducting transition temperature (Tc) for FeSe0.8S0.2 exhibits a dome-shaped behavior below 0.76 GPa. On the other hand, the Tc of FeSe0.25Te0.75 linearly increases up to 0.99 GPa. Here we discuss the relation between the physical pressure effects and the chemical pressure effects on the FeSe system.
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