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arXiv · 2112.09149

Quenched randomness, thermal fluctuations and reentrant superconductivity: application to UTe$_2$

Yue Yu·S. Raghu
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Abstract

Reentrant superconductivity has been observed in the candidate spin-triplet superconductor UTe$_2$ as a function of the magnetic field applied along the hard axis. Resistivity measurements have shown, a broadened superconducting transition appears near the minimal $T_c$, highlighting the importance of superconducting fluctuations in this regime. We present a phenomenological study assuming a field-driven first-order transition between two superconducting states. We show that with quenched randomness, inhomogeneity-enhanced superconducting fluctuations near the transition could naturally account for both the reentrant superconductivity as well as the broadened superconducting transition.

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Yue Yu, S. Raghu. 2021-12-16. Quenched randomness, thermal fluctuations and reentrant superconductivity: application to UTe$_2$. https://doi.org/10.1103/physrevb.105.174506

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