English

Spin-triplet superconductivity from quantum-geometry-induced ferromagnetic fluctuation

Superconductivity 2023-11-28 v2 Strongly Correlated Electrons

Abstract

We show that quantum geometry induces ferromagnetic fluctuation resulting in spin-triplet superconductivity. The criterion for ferromagnetic fluctuation is clarified by analyzing contributions from the effective mass and quantum geometry. When the non-Kramers band degeneracy is present near the Fermi surface, the Fubini-Study quantum metric strongly favors ferromagnetic fluctuation. Solving the linearized gap equation with the effective interaction obtained by the random phase approximation, we show that the spin-triplet superconductivity is mediated by quantum-geometry-induced ferromagnetic fluctuation.

Keywords

Cite

@article{arxiv.2304.11536,
  title  = {Spin-triplet superconductivity from quantum-geometry-induced ferromagnetic fluctuation},
  author = {Taisei Kitamura and Akito Daido and Youichi Yanase},
  journal= {arXiv preprint arXiv:2304.11536},
  year   = {2023}
}

Comments

6 pages, 5 figures (+12 pages, 5 figures)

R2 v1 2026-06-28T10:14:45.300Z