Exploring Fermi Surface Nesting and the Nature of Heavy Quasiparticles in the Spin-Triplet Superconductor Candidate CeRh${}_2$As${}_2$

Abstract

In this study, we investigate the electronic structure of a spin-triplet superconductor candidate CeRh${}_2$As${}_2$ using high-resolution angle-resolved photoemission spectroscopy and density functional theory calculations. Notably, Fermi surface nesting hints at connections to magnetic excitation or quadrupole density wave phenomena, elucidating the superconducting mechanisms. Measured band structures reveal primarily localized 4f electrons, with minor itinerant contributions. Additionally, a transition from localized to itinerant behavior and significant c-f hybridization anisotropy underscore the role of f-electrons in shaping electronic properties. These findings deepen our understanding of CeRh${}_2$As${}_2$'s unconventional superconductivity and magnetism. Further exploration promises advances in superconductivity research.

6 pages, 3 figures

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Cited by in corpus (11)

• Fermi Surface Nesting with Heavy Quasiparticles in the Locally Noncentrosymmetric Superconductor CeRh${}_2$As${}_2$
• Anisotropic magnetic and quadrupolar H-T phase diagram of CeRh2As2
• Unified picture of superconductivity and magnetism in CeRh${}_2$As${}_2$
• Inversion-asymmetric itinerant antiferromagnets by the space group symmetry
• Superconducting meron phase in locally noncentrosymmetric superconductors
• Thermodynamics, elastic anomalies and excitations in the field induced phases of CeRh2As2
• Incommensuration in odd-parity antiferromagnets
• Quantum geometric magnetic monopole and two-phase superconductivity 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
• La substitution studies on the heavy-fermion superconductor CeRh${}_2$As${}_2$