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Thermal stability of pair density wave in a $d$-wave altermagnetic superconductor

Superconductivity 2026-03-27 v1 Strongly Correlated Electrons

Abstract

We study finite-momentum superconductivity in a two-dimensional dd-wave altermagnetic superconductor using a non-perturbative Monte Carlo approach beyond mean-field theory. We show that altermagnetism stabilizes a pair density wave (PDW) state without external magnetic fields and enables its survival at finite temperatures with robust phase coherence. Our results establish altermagnetism as a promising route to realizing thermally stable PDW superconductivity and identify clear thermodynamic and spectroscopic signatures.

Keywords

Cite

@article{arxiv.2603.25314,
  title  = {Thermal stability of pair density wave in a $d$-wave altermagnetic superconductor},
  author = {Amrutha N Madhusuthanan and Madhuparna Karmakar},
  journal= {arXiv preprint arXiv:2603.25314},
  year   = {2026}
}

Comments

10 pages, 5 figures