Field-induced superconductivity mediated by odd-parity multipole fluctuation

Abstract

Field-induced superconductivity has long presented a counterintuitive phenomenon and a pivotal challenge in condensed matter physics. In this Letter, we introduce a mechanism for achieving field-induced superconductivity wherein the sublattice degree of freedom and the Coulomb interaction are tightly entwined. Our multipole-resolved analysis elucidates that lifting the fluctuation degeneracy results in an unconventional Cooper pairing channel, thereby realizing field-induced superconductivity. This research substantively augments the exploration of the latent potential of strongly correlated electron systems with sublattice degrees of freedom.

arXiv comment15 pages (Main text: 9 pages; Supplemental Materials: 6 pages), 5 figures (Main text: 3 figures; Supplemental Materials: 2 figures)

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Cited by in corpus (5)

• Origin of the non-Fermi-liquid behavior in CeRh2As2
• Reciprocal and nonreciprocal paraconductivity in bilayer multiphase superconductors
• Multipolar fluctuations from localized 4f electrons in CeRh2As2
• 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${}_2$