Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8202064 | Annals of Physics | 2015 | 33 Pages |
Abstract
We present a detailed analysis of the pairing symmetry and the order parameter topology in superconductors without centre of inversion. Strong spin-orbit coupling of electrons with the crystal lattice leads to a large splitting of the Bloch bands, which makes it necessary to use a multiband description of superconductivity. We identify stable superconducting states and derive the Bogoliubov-de Gennes Hamiltonian, which determines the spectrum of fermionic quasiparticles. To develop a topological classification of the superconducting states we introduce two different types of topological invariants, the Chern numbers and the Maurer-Cartan invariants, and apply them to three-dimensional noncentrosymmetric superconductors, both with and without time reversal symmetry breaking.
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Physical Sciences and Engineering
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Authors
K.V. Samokhin,