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- W3087788417 abstract "Weyl superconductors feature Weyl points at zero energy in the three-dimensional Brillouin zone and arc states that connect the projections of these Weyl points on the surface. We report that higher-order Weyl superconductors can be realized in odd-parity topological superconductors with time-reversal symmetry being broken by periodic driving. Different from conventional Weyl points, the higher-order Weyl points in the bulk separate 2D first- and second-order topological phases, while on the surface, their projections are connected not only by conventional surface Majorana arcs but also by hinge Majorana arcs. Strikingly, without the protection by a Chern number, the hinge Majorana arcs are anisotropic with respect to surface orientations, forcing a different connectivity of Weyl points for a rotated surface. We identify such anisotropic Weyl-point connectivity as a characteristic feature of higher-order Weyl materials. Moreover, with time-reversal symmetry being broken, the higher-order hinge Majorana arcs are spin polarized, which offers a promising opportunity to observe the anisotropic Weyl-point connectivity with spin-sensitive probes. Besides condensed-matter systems, we provide a feasible experimental setup for realizing our predictions in cold-atom systems." @default.
- W3087788417 created "2020-10-01" @default.
- W3087788417 creator A5005949658 @default.
- W3087788417 creator A5022813763 @default.
- W3087788417 creator A5029671657 @default.
- W3087788417 creator A5037072865 @default.
- W3087788417 creator A5051752300 @default.
- W3087788417 creator A5056993023 @default.
- W3087788417 creator A5068011712 @default.
- W3087788417 date "2021-05-19" @default.
- W3087788417 modified "2023-10-10" @default.
- W3087788417 title "Higher-order Weyl superconductors with anisotropic Weyl-point connectivity" @default.
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- W3087788417 doi "https://doi.org/10.1103/physrevb.103.184510" @default.