Superconducting meron phase in locally noncentrosymmetric superconductors

Abstract

Theory of the superconducting parity transition is extended by incorporating the vortex degree of freedom. We employ the bilayer Rashba model representing locally noncentrosymmetric layered superconductors and derive the Ginzburg-Landau free energy functional. This formulation reveals the parity transition, where the even-parity superconducting state changes to the odd-parity one upon increasing the magnetic field under the vortex states. The H-T phase diagram of CeRh${}_2$As${}_2$ is quantitatively reproduced and a novel superconducting state with a meron (half-skyrmion) lattice pseudospin texture is predicted.

arXiv comment11 pages, 6 figures

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Cited by in corpus (3)

• The phase diagram of CeRh${}_2$As${}_2$ for out-of-plane magnetic field
• Multipolar fluctuations from localized 4f electrons in CeRh2As2
• Quasiclassical theory of vortex states in locally non-centrosymmetric superconductors: application to CeRh${}_2$As${}_2$