Enhancement of d-wave Pairing in Strongly Correlated Altermagnet
Abstract
Altermagnetism, featuring momentum-dependent spin splitting without net magnetization, has attracted a growing interest for spintronics. We study a Fermi Hubbard model with altermagnetic order arising from the spin-anisotropic hopping near half-filling using constrained-path quantum Monte Carlo. Spin-dependent hopping breaks SU(2) symmetry and disrupts Fermi surface nesting, giving rise to an altermagnetic state with momentum-space spin splitting but no net magnetization. We find that increasing anisotropy suppresses long-range antiferromagnetic order and significantly enhances effective -wave pairing correlations. Our results demonstrate a doping-free route to unconventional superconductivity mediated by short-range spin fluctuations in an altermagnetic background.
Keywords
Cite
@article{arxiv.2505.12342,
title = {Enhancement of d-wave Pairing in Strongly Correlated Altermagnet},
author = {Jianyu Li and Ji Liu and Xiaosen Yang and Ho-Kin Tang},
journal= {arXiv preprint arXiv:2505.12342},
year = {2025}
}