Hydrostatic pressure studies on non-superconducting UTe2

Abstract

We report the temperature-pressure phase diagram of a UTe${}_2$ single crystal that does not undergo a bulk superconducting transition but shows filamentary superconductivity with a critical transition temperature of 1 K at ambient pressure. Electrical-resistivity measurements reveal that the evolution of the filamentary superconducting state under pressure resembles the behavior observed in previous reports on bulk superconducting samples. AC calorimetry, however, does not show evidence for either bulk superconductivity or magnetism for pressures up to 1.6 GPa. Our results highlight the role of inhomogeneity in chemical-vapor-transport-grown UTe${}_2$ samples and serve as a cautionary tale when probing electrical resistivity alone.

7 pages, 2 figures

References in corpus (14)

• Spontaneously polarized half-gapped superconductivity
• Extreme magnetic field-boosted superconductivity
• Unconventional Superconductivity in UTe2
• Multiple superconducting phases in a nearly ferromagnetic system
• Evidence for a pressure-induced antiferromagnetic quantum critical point in intermediate valence UTe2
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• Generalized Anderson's theorem for superconductors derived from topological insulators
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• Effect of uranium deficiency on normal and superconducting properties in unconventional superconductor UTe${}_2$
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• Superconducting-Spin Reorientation in Spin-Triplet Multiple Superconducting Phases of UTe2

Cited by in corpus (3)

• Clear Reduction in Spin Susceptibility and Superconducting Spin Rotation for $H\parallel a$ in the Early-Stage Sample of Spin-Triplet Superconductor UTe${}_2$
• Intrinsic low-temperature magnetic properties on the ultra-clean UTe${}_2$ with $T_{\mathrm{c}}$ = 2.1 K revealed by ${}^{125}$Te NMR
• $b$-axis and $c$-axis Knight shift measurements in the superconducting state on ultraclean UTe${}_2$ with $T_c$ = 2.1 K