Quenched randomness, thermal fluctuations, and reentrant superconductivity: Application to UTe2

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