Unified picture of superconductivity and magnetism in CeRh${}_2$As${}_2$

Abstract

We study the micorscopic origin of the multiple superconducting and magnetic phases observed in CeRh${}_2$As${}_2$. We exploit the existence of a van Hove singularity enforced by the nonsymmorphic symmetry to conduct a renormalization group analysis. When Fermi-surface nesting is strong, we find two closely-competing superconducting states with opposite parities, as well as an instability towards specific spin-density wave states, consistent with key features of the phase diagram of CeRh${}_2$As${}_2$.

6 pages, 4 figures. Supplemental material of 20 pages, 9 figures

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Cited by in corpus (8)

• The phase diagram of CeRh${}_2$As${}_2$ for out-of-plane magnetic field
• Incommensuration in odd-parity antiferromagnets
• Quantum geometric magnetic monopole and two-phase superconductivity in CeRh${}_2$As${}_2$
• La substitution studies on the heavy-fermion superconductor CeRh${}_2$As${}_2$
• A Landau Theory for Pair Density Modulation in Fe(Te,Se) flakes
• Composite Superconducting Orders and Magnetism in CeRh${}_2$As${}_2$
• Quasiclassical theory of vortex states in locally non-centrosymmetric superconductors: application to CeRh${}_2$As${}_2$
• Multipolar fluctuations from localized 4f electrons in CeRh2As2