Non-Fermi liquid behavior below the Neel temperature in the frustrated heavy fermion magnet UAu₂.

ABSTRACT: The term Fermi liquid is almost synonymous with the metallic state. The association is known to break down at quantum critical points (QCPs), but these require precise values of tuning parameters, such as pressure and applied magnetic field, to exactly suppress a continuous phase transition temperature to the absolute zero. Three-dimensional non-Fermi liquid states, apart from superconductivity, that are unshackled from a QCP are much rarer and are not currently well understood. Here, we report that the triangular lattice system uranium diauride (UAu₂) forms such a state with a non-Fermi liquid low-temperature heat capacity [Formula: see text] and electrical resistivity [Formula: see text] far below its Néel temperature. The magnetic order itself has a novel structure and is acc

SUBMITTER: O'Neill CD 

PROVIDER: S-EPMC8670503 | biostudies-literature | 2021 Dec

REPOSITORIES: biostudies-literature