Dirac and Weyl Superconductors in Three Dimensions
Superconductivity
2014-07-24 v1 Mesoscale and Nanoscale Physics
Strongly Correlated Electrons
Abstract
We introduce the concept of 3D Dirac (Weyl) superconductors (SC), which have protected bulk four(two)-fold nodal points and surface Andreev arcs at zero energy. We provide a sufficient criterion for realizing them in centrosymmetric SCs with odd-parity pairing and mirror symmetry, e.g., the nodal phases of CuBiSe. Pairs of Dirac nodes appear in a mirror-invariant plane when the mirror winding number is nontrivial. Breaking mirror symmetry may gap Dirac nodes producing a topological SC. Each Dirac node evolves to a nodal ring when inversion-gauge symmetry is broken. A Dirac node may split into a pair of Weyl nodes, only when time-reversal symmetry is broken.
Cite
@article{arxiv.1402.7070,
title = {Dirac and Weyl Superconductors in Three Dimensions},
author = {Shengyuan A. Yang and Hui Pan and Fan Zhang},
journal= {arXiv preprint arXiv:1402.7070},
year = {2014}
}
Comments
5 pages and 2 figures