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- W4386168811 abstract "Recent studies have attracted intense attention on the quasi-2D kagome superconductors $A{mathrm{V}}_{3}{mathrm{Sb}}_{5}$ ($A=mathrm{K}$, Rb, and Cs) where the unexpected chiral flux phase (CFP) associates with the spontaneous time-reversal symmetry breaking in charge density wave states. Here, commencing from the 2-by-2 charge density wave phases, we bridge the gap between topological superconductivity and time-reversal asymmetric CFP in kagome systems. Several chiral topological superconductor (TSC) states featuring distinct Chern numbers emerge for an $s$-wave or a $d$-wave superconducting pairing symmetry. Importantly, these CFP-based TSC phases possess unique gapless edge modes with mixed chiralities (i.e., both positive and negative chiralities), but with the net chiralities consistent with the Bogoliubov--de Gennes Chern numbers. We further study the transport properties of a two-terminal junction, using Chern insulator or normal metal leads via atomic Green's function method with Landauer-Buttiker formalism. In both cases, the normal electron tunneling and the crossed Andreev reflection oscillate as the chemical potential changes, but together contribute to plateau transmissions (1 and $frac{3}{2}$, respectively) that exhibit robustness against disorder. These behaviors can be regarded as the signature of a TSC hosting edge states with mixed chiralities." @default.
- W4386168811 created "2023-08-26" @default.
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- W4386168811 date "2023-08-25" @default.
- W4386168811 modified "2023-10-16" @default.
- W4386168811 title "Chiral-Flux-Phase-Based Topological Superconductivity in Kagome Systems with Mixed Edge Chiralities" @default.
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- W4386168811 doi "https://doi.org/10.1103/physrevlett.131.086601" @default.
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