Odd-Parity Magnetism in Fe-Based Superconductors

Abstract

Odd-parity magnetism constitutes an intriguing phase of matter which breaks inversion symmetry while preserving time-reversal symmetry. Here we demonstrate that the Fe-based superconductors exhibiting coplanar magnetic order realize an odd-parity magnetic state by combining low-energy modeling with density-functional theory. In the absence of spin-orbit coupling, the electronic spins are polarized along the $k_z$-direction and the splitting of the up and down states exhibits an $h$-wave form-factor. The magnitude of the splitting depends sensitively on specific parameters of the low-energy model, including specific out-of-plane hopping parameters and the Fermi energies of the hole- and electron-pockets. Interestingly, despite this state breaking inversion symmetry and exhibiting a finite out-of-plane Berry curvature and non-linear anomalous Hall effect, the Edelstein effect vanishes. Incorporating spin-orbit coupling tilts the momentum-space electronic spins into the ($k_x,k_y$)-plane and imparts finite in-plane components to the Edelstein response. Our findings highlight the Fe-based superconductors as platforms for exploring odd-parity magnetism both on its own and coexisting with unconventional superconductivity.

13 pages, 8 figures

References in corpus (60)

• Spintronics: Fundamentals and applications
• Superconductivity in Iron Compounds
• A Common Thread: the pairing interaction for the unconventional superconductors
• Quantum nonlinear Hall effect induced by Berry curvature dipole in time-reversal invariant materials
• Altermagnetism: spin-momentum locked phase protected by non-relativistic symmetries
• Antiferromagnetic order and spin dynamics in iron-based superconductors
• Magnetism, superconductivity, and pairing symmetry in Fe-based superconductors
• Strong Correlations and Magnetic Frustration in the High Tc Iron Pnictides
• Spontaneously polarized half-gapped superconductivity
• Magnetism and its microscopic origin in iron-based high-temperature superconductors
• Superconductivity and spin-orbit coupling in non-centrosymmetric materials: a review
• Momentum-Dependent Spin Splitting by Collinear Antiferromagnetic Ordering
• Topological superconducting phase in helical Shiba chains
• Giant and tunneling magnetoresistance effects from anisotropic and valley-dependent spin-momentum interactions in antiferromagnets
• Direct observation of altermagnetic band splitting in CrSb thin films
• Nonlinear Hall Effects
• Prediction of unconventional magnetism in doped FeSb2
• Multiband magnetism and superconductivity in Fe-based compounds
• Electronic structure of the iron-based superconductor LaOFeP
• Comparison of Ab initio Low-Energy Models for LaFePO, LaFeAsO, BaFe2As2, LiFeAs, FeSe and FeTe: Electron Correlation and Covalency
• Magnetism in Fe-based superconductors
• Ironing out the details of unconventional superconductivity
• Extreme magnetic field-boosted superconductivity
• Fermi liquid instabilities in the spin channel
• Discovery of a metallic room-temperature d-wave altermagnet KV2Se2O
• Tight-binding models for the new iron based superconductor materials
• The key ingredients of the electronic structure of FeSe
• Orbital Ordering and Unfrustrated $(\pi ,0)$ Magnetism from Degenerate Double Exchange in the Iron Pnictides
• Finite-momentum Cooper pairing in proximitized altermagnets
• Unified Picture for Magnetic Correlations in Iron-Based Superconductors
• Enumeration and representation theory of spin space groups
• Magnetically-Driven Suppression of Nematic Order in an Iron-Based Superconductor
• Space group symmetry, spin-orbit coupling and the low energy effective Hamiltonian for iron based superconductors
• Magnetic octupoles as the order parameter for unconventional antiferromagnetism
• Low-energy microscopic models for iron-based superconductors: a review
• Spin Space Groups: Full Classification and Applications
• Spin-split collinear antiferromagnets: a large-scale ab-initio study
• Enumeration of spin-space groups: Towards a complete description of symmetries of magnetic orders
• On the Remarkable Superconductivity of FeSe and its Close Cousins
• Double-Q spin-density wave in iron arsenide superconductors
• Spontaneous Antisymmetric Spin Splitting in Noncollinear Antiferromagnets without Spin-Orbit Coupling
• Two-dimensional altermagnets from high throughput computational screening: symmetry requirements, chiral magnons and spin-orbit effects
• Hedgehog spin-vortex crystal stabilized in a hole-doped iron-based superconductor
• Competing orders in FeAs layers
• Competing magnetic double-Q phases and superconductivity-induced re-entrance of C2 magnetic stripe order in iron pnictides
• Spin reorientation driven by the interplay between spin-orbit coupling and Hund's rule coupling in iron pnictides
• Pairing in the Two-Dimensional Hubbard Model from Weak to Strong Coupling
• Altermagnetism in the layered intercalated transition metal dichalcogenide CoNb${}_4$Se${}_8$
• Coexisting spin resonance and long-range magnetic order of Eu in EuRbFe${}_4$As${}_4$
• Metallic $p$-wave magnet with commensurate spin helix
• Odd-parity Magnetism Driven by Antiferromagnetic Exchange
• Role of multiorbital effects in the magnetic phase diagram of iron-pnictides
• Intertwined spin-orbital coupled orders in the iron-based superconductors
• Helical magnetic ordering in Sr(Co1-xNix)2As2
• Antiferromagnetic Stacking of Ferromagnetic Layers and Doping Controlled Phase Competition in Ca${}_{1-x}$Sr${}_x$Co${}_{2-y}$As${}_2$
• Incommensurate magnetism near quantum criticality in CeNiAsO
• Pseudo-Ising superconductivity induced by $p$-wave magnetism
• Inversion-asymmetric itinerant antiferromagnets by the space group symmetry
• Competing magnetic fluctuations and orders in a multiorbital model of doped SrCo${}_2$As${}_2$
• EuAuSb: An odd-parity helical variation on altermagnetism

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