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

References in corpus (43)

• Superconducting Spintronics
• Gap symmetry and structure of Fe-based superconductors
• Altermagnetism: spin-momentum locked phase protected by non-relativistic symmetries
• Superconductivity on the border of weak itinerant ferromagnetism in UCoGe
• Broken Kramers' degeneracy in altermagnetic MnTe
• Experimental realization and characterization of an electronic Lieb lattice
• Direct observation of altermagnetic band splitting in CrSb thin films
• Observation of Giant Band Splitting in Altermagnetic MnTe
• Large band-splitting in $g$-wave type altermagnet CrSb
• Discovery of a metallic room-temperature d-wave altermagnet KV2Se2O
• Odd-frequency superconductivity
• Topological Superconductivity in Two-Dimensional Altermagnetic Metals
• Finite-momentum Cooper pairing in proximitized altermagnets
• Two-dimensional altermagnets: Superconductivity in a minimal microscopic model
• Crystal-symmetry-paired spin-valley locking in a layered room-temperature antiferromagnet
• Minimal Models for Altermagnetism
• Mirror Chern Bands and Weyl Nodal Loops in Altermagnets
• Odd-parity superconductivity from phonon-mediated pairing: Application to Cu${}_x$Bi${}_2$Se${}_3$
• Enhancement of superconductivity mediated by antiferromagnetic squeezed magnons
• Altermagnetism in the layered intercalated transition metal dichalcogenide CoNb${}_4$Se${}_8$
• Unconventional p-wave and finite-momentum superconductivity induced by altermagnetism through the formation of Bogoliubov Fermi surface
• Amperean Pairing at the Surface of Topological Insulators
• Altermagnetism and superconductivity in a multiorbital t-J model
• Superconductivity Induced by Interfacial Coupling to Magnons
• Notes on altermagnetism and superconductivity
• Superconductivity at metal-antiferromagnetic insulator interfaces
• Topological Superconductivity Mediated by Skyrmionic Magnons
• Many-body effects on superconductivity mediated by double-magnon processes in altermagnets
• Eliashberg study of superconductivity induced by interfacial coupling to antiferromagnets
• Magnon-mediated superconductivity on the surface of a topological insulator
• Altermagnetic phase transition in a Lieb metal
• Phonon-mediated superconductivity in doped monolayer materials
• Magnon-induced superconductivity in a topological insulator coupled to ferro- and antiferromagnetic insulators
• Unconventional superconducting pairing symmetry induced by phonons
• Andreev Reflection in Scanning Tunneling Spectroscopy of Unconventional Superconductors
• Possible odd-frequency Amperean magnon-mediated superconductivity in topological insulator -- ferromagnetic insulator bilayer
• Topological superconductivity mediated by magnons of helical magnetic states
• Enhancement of ferromagnetism by p-wave Cooper pairing in superconducting ferromagnets
• Stability of superconducting gap symmetries arising from antiferromagnetic magnons
• Topological Interlayer Superconductivity in a van der Waals Heterostructure
• Magnon-mediated topological superconductivity in a quantum wire
• Tunneling spectra of impurity states in unconventional superconductors
• Strong-coupling approach to temperature dependence of competing orders of superconductivity: Possible time-reversal symmetry breaking and nontrivial topology

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