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Enhancement of d-wave Pairing in Strongly Correlated Altermagnet

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arxiv 2505.12342 v1 pith:DZ6KLK53 submitted 2025-05-18 cond-mat.str-el cond-mat.supr-con

Jianyu Li , Ji Liu , Xiaosen Yang , Ho-Kin Tang This is my paper · ORCID
classification cond-mat.str-elcond-mat.supr-con
keywords altermagneticspinfermihoppingmagnetizationorderpairingsplitting
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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 $d$-wave pairing correlations. Our results demonstrate a doping-free route to unconventional superconductivity mediated by short-range spin fluctuations in an altermagnetic background.

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Cited by 3 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Weak-coupling altermagnetism and chiral magnetic excitations in a checkerboard lattice

    cond-mat.str-el 2026-07 accept novelty 6.0 of 10

    Checkerboard-lattice Hubbard electrons are unstable to weak-coupling altermagnetism whose magnons display alternating chirality splitting.

  2. Superconducting States and Intertwined Orders in Metallic Altermagnets

    cond-mat.supr-con 2026-03 conditional novelty 6.0 of 10

    In C4T-symmetric d-wave altermagnets, equal-spin p-wave pairing condenses in two non-degenerate two-component gap sets, producing two transition temperatures, with nematic and spin-current-loop fluctuations respective...

  3. Variation of Bose surface by Filling in Cooper pair Bose metal

    physics.comp-ph 2025-05 conditional novelty 6.0 of 10

    In the spin-anisotropic attractive Hubbard model, NNN hopping enlarges the Cooper pair Bose metal phase, allows it to coexist with CDW near half filling, and couples Bose-surface orientation to Fermi-surface rotation.

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