Competition between the structural phase transition and superconductivity in Ir$_{1-x}$Pt$_x$Te$_2$ as revealed by pressure effects

TL;DR

This study investigates how pressure influences the competition between structural phase transitions and superconductivity in Ir$_{1-x}$Pt$_x$Te$_2$, revealing a unique pressure response compared to similar systems.

Contribution

It demonstrates the contrasting pressure effects on structural transition and superconductivity in Ir$_{1-x}$Pt$_x$Te$_2$, highlighting a different behavior from typical charge density wave systems.

Findings

Pressure enhances the structural phase transition.

Pressure suppresses the superconducting transition.

Superconductivity competes with the monoclinic phase stabilization.

Abstract

Pressure-dependent transport measurements of Ir$_{1-x}$Pt$_x$Te$_2$ are reported. With increasing pressure, the structural phase transition at high temperatures is enhanced while its superconducting transition at low temperatures is suppressed. These pressure effects make Ir$_{1-x}$Pt$_x$Te$_2$ distinct from other studied $T$X$_2$ systems exhibiting a charge density wave (CDW) state, in which pressure usually suppresses the CDW state and enhances the superconducting state. The results reveal that the emergence of superconductivity competes with the stabilization of the low temperature monoclinic phase in Ir$_{1-x}$Pt$_x$Te$_2$.