Pair Density Waves and Supercurrent Diode Effect in Altermagnets

Abstract

Metallic altermagnets are unusual collinear magnets that feature zero net magnetization with momentum-dependent spin splitting. Here, we show that this spin splitting can induce pair density wave states even in the absence of external magnetic fields. Focusing on BCS-type attractive interactions, we find the stabilization of symmetrically distinct pair density wave states depending on the chemical potential. These states include Fulde-Ferrell and Fulde-Ferrell* states, both of which break inversion symmetry. We investigate the supercurrent properties and discover non-reciprocal supercurrents for both the Fulde-Ferrell and Fulde-Ferrell* states with distinct spatial dependencies. We propose that the supercurrent diode effect can serve as an experimental tool for distinguishing between different pair density waves in metallic altermagnets and discuss the relation to material candidates.

9 pages, 5 figures

References in corpus (51)

• Odd Triplet Superconductivity and Related Phenomena in Superconductor-Ferromagnet Structures
• A Common Thread: the pairing interaction for the unconventional superconductors
• Theory of Intertwined Orders in High Temperature Superconductors
• Altermagnetism: spin-momentum locked phase protected by non-relativistic symmetries
• Crystal Hall effect in Collinear Antiferromagnets
• Observation of the Anomalous Hall Effect in a Collinear Antiferromagnet
• Giant momentum-dependent spin splitting in centrosymmetric low Z antiferromagnets
• Efficient Electrical Spin-Splitter Based on Non-Relativistic Collinear Antiferromagnetism
• Magnetism and its microscopic origin in iron-based high-temperature superconductors
• The Physics of Pair Density Waves
• Direct observation of altermagnetic band splitting in CrSb thin films
• Supercurrent diode effect and finite momentum superconductivity
• A phenomenological theory of superconductor diodes
• Dislocations and vortices in pair density wave superconductors
• dc Josephson Effect in Altermagnets
• Topological Superconductivity in Two-Dimensional Altermagnetic Metals
• Finite-momentum Cooper pairing in proximitized altermagnets
• Theory of 2D superconductor with broken inversion symmetry
• Altermagnetic Routes to Majorana Modes in Zero Net Magnetization
• Andreev reflection at the altermagnet-superconductor interface
• Two-dimensional altermagnets: Superconductivity in a minimal microscopic model
• Topological transition from nodal to nodeless Zeeman splitting in altermagnets
• Theory of zero-field superconducting diode effect in twisted trilayer graphene
• Phase-shifted Andreev levels in an altermagnet Josephson junction
• Fluctuations and phase transitions in Larkin-Ovchinnikov liquid crystal states of population-imbalanced resonant Fermi gas
• Altermagnetic superconducting diode effect
• Strain-stabilized superconductivity
• Majorana corner modes and tunable patterns in an altermagnet heterostructure
• Spontaneous Formation of Altermagnetism from Orbital Ordering
• Unconventional superconductivity in bilayer transition metal dichalcogenides
• Tunable Josephson diode effect on the surface of topological insulators
• Superconductivity in Uniquely Strained RuO${}_2$ Films
• Realizing Altermagnetism in Fermi-Hubbard Models with Ultracold Atoms
• Pair-Density-Wave Superconducting States and Electronic Liquid Crystal Phases
• Enhancing the Josephson diode effect with Majorana bound states
• $\phi$ Josephson junction induced by altermagnetism
• Superconductor-altermagnet memory functionality without stray fields
• Tunable band topology and optical conductivity in altermagnets
• Fulde-Ferrell-Larkin-Ovchinnikov state induced by antiferromagnetic order in $\kappa$-type organic conductors
• Unconventional p-wave and finite-momentum superconductivity induced by altermagnetism through the formation of Bogoliubov Fermi surface
• Theory of Tunneling Spectroscopy in Unconventional $p$-wave Magnet-Superconductor Hybrid Structures
• Altermagnetism and superconductivity in a multiorbital t-J model
• Dynamic paramagnon-polarons in altermagnets
• Many-body effects on superconductivity mediated by double-magnon processes in altermagnets
• Unconventional superconductivity in altermagnets with spin-orbit coupling
• Current-carrying states in FFLO superconductors
• Multiple-q current states in a multicomponent superconducting channel
• Topological Larkin-Ovchinnikov phase and Majorana zero mode chain in bilayer superconducting topological insulator films
• Multipolar superconductivity in Luttinger semimetals
• Fulde-Ferrell-Larkin-Ovchinnikov superconductors near a surface
• Triplet-Superconductivity in Triple-Band Crossings

Cited by in corpus (11)

• Spin and pair density waves in 2D altermagnetic metals
• Light-induced odd-parity altermagnets on dimerized lattices
• Real Chern insulators in two-dimensional altermagnetic Fe${}_2$S${}_2$O and Fe${}_2$Se${}_2$O
• Quantum Lifshitz points in an altermagnetic metal
• Inherent momentum-dependent gap structure of altermagnetic superconductors
• Altermagnetism-driven FFLO superconductivity in finite-filling 2D lattices
• Van-Hove singularities and competing instabilities in an altermagnetic metal
• Josephson diode and spin-valve effects on the surface of altermagnet CrSb
• Enhanced Superconducting Diode Effect in the Asymmetric Hatsugai-Kohmoto Model
• Superconducting States and Intertwined Orders in Metallic Altermagnets
• Field-free Superconducting Diode Effect and Topological Fulde-Ferrell Superconductivity in Altermagnetic Shiba Chains