Unusual $H$-$T$ phase diagram of CeRh${}_2$As${}_2$ -- the role of staggered non-centrosymmetricity

Abstract

Superconductivity in a crystalline lattice without inversion is subject to complex spin-orbit-coupling effects, which can lead to mixed-parity pairing and an unusual magnetic response. In this study, the properties of a layered superconductor with alternating Rashba spin-orbit coupling in the stacking of layers, hence (globally) possessing a center of inversion, is analyzed in an applied magnetic field, using a generalized Ginzburg-Landau model. The superconducting order parameter consists of an even- and an odd-parity pairing component which exchange their roles as dominant pairing channel upon increasing the magnetic field. This leads to an unusual kink feature in the upper critical field and a first-order phase transition within the mixed phase. We investigate various signatures of this internal phase transition. The physics we discuss here could explain the recently found $H$--$T$ phase diagram of the heavy Fermion superconductor CeRh${}_2$As${}_2$.

References in corpus (4)

• Non-Abelian Topological Order in S-Wave Superfluids of Ultracold Fermionic Atoms
• Topological Phases of Noncentrosymmetric Superconductors: Edge States, Majorana Fermions, and the Non-Abelian Statistics
• Topological spin-current in non-centrosymmetric superconductors
• Andreev bound states and tunneling characteristics of a non-centrosymmetric superconductor

Cited by in corpus (37)

• Superconductivity and Local Inversion-Symmetry Breaking
• Topological crystalline superconductivity in locally noncentrosymmetric CeRh${}_2$As${}_2$
• Observation of antiferromagnetic order as odd-parity multipoles inside the superconducting phase in CeRh${}_2$As${}_2$
• Non-symmorphic symmetry and field-driven odd-parity pairing in CeRh${}_2$As${}_2$
• Field-angle dependence reveals odd-parity superconductivity in CeRh${}_2$As${}_2$
• Two scenarios for superconductivity in CeRh${}_2$As${}_2$
• Electronic and dynamical properties of CeRh${}_2$As${}_2$: Role of Rh${}_2$As${}_2$ layers and expected hidden orbital order
• Triplet pairing mechanisms from Hund's-Kondo models: applications to UTe${}_2$ and CeRh${}_2$As${}_2$
• Even-odd parity transition in strongly correlated locally noncentrosymmetric superconductors : An application to CeRh${}_2$As${}_2$
• Superconductivity in disordered locally noncentrosymmetric materials: an application to CeRh${}_2$As${}_2$
• Two-dimensional XY-type Magnetic Properties of Locally Noncentrosymmetric Superconductor CeRh${}_2$As${}_2$
• Parity transition of spin-singlet superconductivity using sub-lattice degrees of freedom
• Violation of the Pauli-Clogston limit in a heavy Fermion superconductor CeRh${}_2$As${}_2$ --Duality of itinerant and localized 4f electrons--
• Decoupling multi-phase superconductivity from normal state ordering in CeRh${}_2$As${}_2$
• Spin response and topology of a staggered Rashba superconductor
• Discovery of magnetic phase transitions in heavy-fermion superconductor CeRh${}_2$As${}_2$
• Low-Temperature Thermal Conductivity of CeRh${}_2$As${}_2$
• Coexistence of near-EF flat band and van Hove singularity in a two-phase superconductor
• Fermi Surface Nesting with Heavy Quasiparticles in the Locally Noncentrosymmetric Superconductor CeRh${}_2$As${}_2$
• Spectroscopic evidence of Kondo-induced quasi-quartet in CeRh${}_2$As${}_2$
• Exploring Fermi Surface Nesting and the Nature of Heavy Quasiparticles in the Spin-Triplet Superconductor Candidate CeRh${}_2$As${}_2$
• Multiple superconducting phases in heavy-fermion metals
• Correlation-induced Fermi surface evolution and topological crystalline superconductivity in CeRh2As2
• Coexistence of local magnetism and superconductivity in the heavy-fermion CeRh${}_2$As${}_2$ revealed by $\mu$SR studies
• Kramers' degenerate magnetism and superconductivity
• Topological d-wave superconductivity in two dimensions
• Horizontal flux growth as an efficient preparation method of CeRh${}_2$As${}_2$ single crystals
• Origin of the non-Fermi-liquid behavior in CeRh2As2
• Effects of nucleation at a first-order transition between two superconducting phases: Application to CeRh${}_2$As${}_2$
• Bardasis-Schrieffer-like phase mode in a superconducting bilayer
• Field-induced superconductivity mediated by odd-parity multipole fluctuation
• The phase diagram of CeRh${}_2$As${}_2$ for out-of-plane magnetic field
• Superconducting meron phase in locally noncentrosymmetric superconductors
• Reciprocal and nonreciprocal paraconductivity in bilayer multiphase superconductors
• Multipolar fluctuations from localized 4f electrons in CeRh2As2
• La substitution studies on the heavy-fermion superconductor CeRh${}_2$As${}_2$
• Composite Superconducting Orders and Magnetism in CeRh${}_2$As${}_2$