Resistivity of non-Fermi liquid U2Pt2In under pressure

TL;DR

This study investigates the non-Fermi liquid resistivity behavior of U2Pt2In under pressure, revealing pressure-induced changes in power-law behavior and a magnetic-origin resistivity minimum, with the c/a ratio as a key control parameter.

Contribution

It presents new experimental data on how hydrostatic pressure affects the resistivity and magnetic properties of U2Pt2In, highlighting the importance of the c/a ratio as a control parameter.

Findings

Resistivity follows a power law with alpha~0.5 at ambient pressure.

Alpha increases with pressure, indicating non-Fermi liquid behavior evolution.

A resistivity minimum appears above 1 GPa, confirmed to be of magnetic origin.

Abstract

Non-Fermi liquid behaviour in single-crystalline U2Pt2In has been studied by means of resistivity experiments (I||c) under hydrostatic pressure (P<1.5 GPa). At ambient pressure the resistivity rho(T) follows a power law rho~T^alpha with alpha~0.5. Upon applying pressure alpha increases. For P>1 GPa a minimum develops in rho(T). A study of the field dependence of the minimum confirms its magnetic origin. The ratio c/a is proposed as the effective control parameter, rather than the unit cell volume.