Pressure effects on strained FeSe0.5Te0.5 thin films

TL;DR

This study investigates how applying pressure affects the resistivity and superconducting transition temperature of prestrained FeSe0.5Te0.5 thin films, revealing a significant Tc increase under pressure that cannot be explained solely by changes in anion height.

Contribution

It provides new insights into the pressure dependence of Tc in FeSe0.5Te0.5 thin films, highlighting the complexity beyond simple structural parameter changes.

Findings

Tc increases significantly with pressure in all films

Anion height alone does not explain Tc variation

Other parameters influence pressure effects on superconductivity

Abstract

The pressure effect on the resistivity and superconducting Tc of prestrained thin films of the iron chalcogenide superconductor FeSe0.5Te0.5 is studied. Films with different anion heights above the Fe layer showing different values of ambient pressure Tc's are compressed up to a pressure of 1.7 GPa. All films exhibit a significant increase of Tc with pressure. The results cannot solely be explained by a pressure-induced decrease of the anion height but other parameters have to be considered to explain the data for all films.