Topological superconducting states and quasiparticle transport on the kagome lattice

Abstract

The pairing symmetry of superconducting state is a critical topic in the realm of topological superconductivity. However, the pairing symmetry of the AV3Sb5 family, wherein A=K,Rb,Cs, remains indeterminate. To address this issue, we formulate an effective model on the kagome lattice to describe topological superconducting states featuring chiral charge density waves. Through this model, we explore the topological phase diagrams and thermal Hall conductivity under various parameters, with and without spin-orbit coupling. Our analysis reveals that the disparities in thermal Hall conductivity curves among different pairing symmetry states are safeguarded by the topology resulting from the interplay of spin-orbital coupling and superconductivity. Remarkably, this theoretical prediction can potentially enable the differentiation of various superconducting pairing symmetry states in materials via experimental measurements of thermal Hall conductivity curves.

Source-reported materials — not catalogue approval

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