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Boer, F. R. De
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article
Pressure-induced recovery of the Fermi-liquid state in the non-Fermi liquid material U2Pt2In
Abstract
In the study of non-Fermi-liquid (NFL) phenomena in correlated metals, U2Pt2In is of special interest as it is one of the rare stoichiometric (undoped) materials that show NFL behaviour at ambient pressure. Here we report on the stability of the NFL phase with respect to hydrostatic pressure (p [less-than or equal to] 1.8 GPa). Electrical resistivity data under pressure, taken on a single-crystalline sample for a current in the tetragonal plane, show that TFL, i.e. the temperature below which the Fermi-liquid T2-term is observed, increases with pressure as TFL [similar to] (p-pc), where pc approximately equals 0 is a critical pressure. This provides evidence for the location of U2Pt2In at an antiferromagnetic quantum critical point. © 2002 Elsevier Science B.V. All rights reserved.