Recovery of the Fermi-liquid state in U3Ni3Sn4 by pressure
Abstract
Measurements of the resistivity of single-crystalline U3Ni3Sn4 under hydrostatic pressure up to 1.8 GPa are reported. We show that the temperature TFL, below which the resistivity obeys the Fermi-liquid expression rho ~ T2, increases with pressure as TFL ~ (p-pc)1/2. The analysis of the data within the magnetotransport theory of Rosch lends strong support for an antiferromagnetic quantum critical point in U3Ni3Sn4 at a negative critical pressure pc of -0.04+-0.02 GPa. The proximity to an antiferromagnetic instability in U3Ni3Sn4 is consistent with the previously reported non-Fermi liquid term in the low-temperature specific heat.
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