Symmetry of superconducting pairing in non-pseudospin electron bands
arXiv:1907.08080 · doi:10.1103/PhysRevB.100.054501
Abstract
We develop the symmetry classification of superconducting gap functions in electron bands that do not transform under the crystal point group operations like the pure spin-1/2 states. The Bloch state bases in twofold degenerate bands with spin-orbit coupling are defined across the Brillouin zone in the way which satisfies the symmetry and continuity requirements. These bases are used to construct general multiband pairing Hamiltonians in centrosymmetric crystals. Focusing on single-band pairing, four exceptional cases are identified in which the triplet gap function does not transform under the point group operations as a pseudovector, with a significant impact on the nodal structure.
12 pages
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Cited by in corpus (7)
- Nonunitary Superconductivity in Complex Quantum Materials
- Superconductivity of anomalous pseudospin
- General theory of robustness against disorder in multi-band superconductors
- Identifying Topological Superconductivity in 2D Transition-Metal Dichalcogenides
- Exotic interband pairing in multiband superconductors
- Spin susceptibility of superconductors with strong spin-orbit coupling
- Supercurrent-Induced Weyl Superconductivity