On the pseudospin description of the electron Bloch bands
arXiv:1906.08106 · doi:10.1016/j.aop.2019.04.016
Abstract
We study the transformation properties of the electron states in crystals with spin-orbit coupling, focusing primarily on the limitations of the frequently used pseudospin-1/2 description of twofold degenerate Bloch bands. Using the language of corepresentations of magnetic point groups, we construct the Bloch bases across the Brillouin zone in a way which is consistent with all symmetry requirements. This construction is applied to derive the effective spin-orbit Hamiltonians in noncentrosymmetric crystals, known as the generalized Rashba models, in both single-band and multiband cases.
arXiv comment31 pages,
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- Superconductivity of anomalous pseudospin
- Symmetry of superconducting pairing in non-pseudospin electron bands
- Exotic interband pairing in multiband superconductors
- Spin susceptibility of superconductors with strong spin-orbit coupling
- Topological Optical Pseudospin Injection Beyond Weyl Semimetals