Possible Pressure-Induced Charge-Density Wave Quantum Critical Point in LuPd2In

TL;DR

This study explores how hydrostatic pressure influences the charge-density wave state in LuPd2In, revealing a potential quantum critical point at high pressure through combined experimental and theoretical approaches.

Contribution

It provides evidence for a pressure-induced quantum critical point in LuPd2In, combining resistivity measurements with theoretical analysis.

Findings

CDW transition temperature increases with pressure in Lu(Pt0.7Pd0.3)2In

Experimental and theoretical results suggest a quantum critical point at ~20 GPa in LuPd2In

Pressure effects on CDW are contrary to simple volume-based expectations

Abstract

We investigated the effect of application of hydrostatic pressure on the charge-density wave (CDW) state in Lu(Pt$_{1-x}$Pd$_x$)$_2$In by electrical-resistivity measurements. In Lu(Pt$_{0.7}$Pd$_{0.3}$)$_{2}$In we find an increase of the CDW transition temperature upon application of pressure, which is not expected based on simple volume arguments, but in line with results of a theoretical work by Kim et al. [Phys. Rev. Lett. 125, 157001 (2020).]. Combining experimental and theoretical results suggests the existence of a CDW quantum critical point in stoichiometric LuPd$_2$In around $p\approx20$ GPa.