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

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.

arXiv commentAdded superfluid stiffness result (Eq.7). References added. Updated Fig.4 with more sweeps

References in corpus (15)

• Spontaneously polarized half-gapped superconductivity
• Unconventional Superconductivity in Heavy Fermion UTe2
• First order transitions and multicritical points in weak itinerant ferromagnets
• Field-reentrant superconductivity close to a metamagnetic transition in the heavy-fermion superconductor UTe${}_2$
• Field-induced transition from even to odd parity superconductivity in CeRh${}_2$As${}_2$
• Extremely Large and Anisotropic Upper Critical Field and the Ferromagnetic Instability in UCoGe
• Metamagnetic Transition in Heavy Fermion Superconductor UTe2
• Point Node Gap Structure of Spin-Triplet Superconductor UTe2
• Incommensurate Spin Fluctuations in the Spin-triplet Superconductor Candidate UTe${}_2$
• Low-dimensional antiferromagnetic fluctuations in the heavy-fermion paramagnetic ladder UTe${}_2$
• Enhanced spin triplet superconductivity due to Kondo destabilization
• Spatially inhomogeneous superconductivity in UTe2
• Pressure Evolution of the Ferromagnetic and Field Re-entrant Superconductivity in URhGe
• Inhomogeneous Superconducting State Probed by ${}^{125}$Te NMR on UTe$_2
• Wing structure in the phase diagram of the Ising Ferromagnet URhGe close to its tricritical point investigated by angle-resolved magnetization measurements

Cited by in corpus (4)

• Field-induced tuning of the pairing state in a superconductor
• Triplet pairing mechanisms from Hund's-Kondo models: applications to UTe${}_2$ and CeRh${}_2$As${}_2$
• Theory of the low- and high-field superconducting phases of UTe${}_2$
• Field-angle evolution of the superconducting and magnetic phases of UTe${}_2$ around the $b$ axis