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.
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)