Intrinsic Anomalous Thermal Hall Effect in the Unconventional Superconductor UTe2

Abstract

We investigate the intrinsic anomalous thermal Hall effect as an effective probe of the order parameters of non-unitary pairing states of the putative spin-triplet superconductor UTe${}_2$. We consider all symmetry-allowed non-unitary states under magnetic fields comprehensively, and calculate the anomalous Hall conductivity arising from time-reversal symmetry-breaking Weyl point nodes of the gap functions, assuming three types of Fermi surfaces; ellipsoid-shaped, cylinder-shaped, and ring-shaped ones, which are predicted by previous band calculations. We find the nonzero anomalous thermal Hall conductivity in the certain ratio of the two irreducible representations. The results may be utilized for future exploration of pairing states of UTe${}_2$.

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Cited by in corpus (7)

• Quasi-2D Fermi surface in the anomalous superconductor UTe2
• Triplet pairing mechanisms from Hund's-Kondo models: applications to UTe${}_2$ and CeRh${}_2$As${}_2$
• Anisotropic field-induced changes in the superconducting order parameter of UTe2
• Higher-order topological phases for time-reversal-symmetry breaking superconductivity in UTe${}_2$
• Impurity bands, line-nodes, and anomalous thermal Hall effect in Weyl superconductors
• Slow magnetic quantum oscillations in the c-axis magnetoresistance of UTe${}_2$
• Nuclear spin relaxation rate of nonunitary Dirac and Weyl superconductors