Low Temperature Thermal Hall Conductivity of a Nodal Chiral Superconductor

Abstract

Motivated by Sr2RuO4, we consider a chiral superconductor where the gap is strongly suppressed along certain momentum directions. We evaluate the thermal Hall conductivity in the gapless regime, i.e., at temperature small compared with the impurity band width γ, taking the simplest model of isotropic impurity scattering. We find that, under favorable circumstances, this thermal Hall conductivity can be quite significant, and is smaller than the diagonal component (the universal thermal conductivity) only by a factor of 1/ ln(2 Δ_M/γ), where Δ_M is the maximum gap.

17 pages, 3 figures

References in corpus (4)

• Hidden quasi one-dimensional superconductivity in Sr${}_2$RuO${}_4$
• Is Sr2RuO4 a Chiral P-Wave Superconductor?
• Quantum Thermal Hall Effect in a Time-Reversal-Symmetry-Broken Topological Superconductor in Two Dimensions : Approach From Bulk Calculations
• Large Chern Number and Edge Currents in Sr2RuO4

Cited by in corpus (9)

• Spin-Nernst Effect in Time-Reversal-Invariant Topological Superconductors
• Intrinsic Anomalous Thermal Hall Effect in the Unconventional Superconductor UTe2
• Observation of Anomalous Thermal Hall Effect in a Kagome Superconductor
• Spin caloritronics as a probe of nonunitary superconductors
• Anomalous acoustoelectric effect induced by clapping modes in chiral superconductors
• Anomalous Hall Effects in Chiral Superconductors
• Drastic enhancement of the thermal Hall angle in a $d$-wave superconductor
• Impurity bands, line-nodes, and anomalous thermal Hall effect in Weyl superconductors
• Impurity-Induced Anomalous Thermal Hall Effect in Chiral Superconductors