Phonon-mediated spin-polarized superconductivity in altermagnets

Abstract

We consider the possibility of phonon-mediated unconventional superconductivity in a recently discovered new class of antiferromagnets, dubbed altermagnets. Within a weak-coupling approach, and using a minimal Lieb lattice model for altermagnets, we find a dominant superconducting instability odd in momentum and even in spin with spin-polarized Cooper pairs. We discuss the origin of this unusual result in terms of the spin-structure of the altermagnetic Fermi surface, in combination with the momentum-space structure of the effective phonon-mediated electron-electron interactions on the Fermi surface.

12 pages, 6 figures

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Cited by in corpus (9)

• Light-induced Floquet spin-triplet Cooper pairs in unconventional magnets
• Altermagnetism and its induced higher-order topology on the Lieb lattice
• Spin-dependent quasiparticle lifetimes in altermagnets
• Inherent momentum-dependent gap structure of altermagnetic superconductors
• Spin-resolved quasiparticle interference patterns on altermagnets via non-spin-resolved scanning tunneling microscopy
• Spin triplet pairing by suppressing altermagnetism
• Superconducting States and Intertwined Orders in Metallic Altermagnets
• Mechanism for Nodal Topological Superconductivity on PtBi${}_2$ Surface
• Spin-Valley Locking and Pure Spin-Triplet Superconductivity in Noncollinear Antiferromagnets Proximitized to Conventional Superconductors