Non-linear anomalous Edelstein response at altermagnetic interfaces

Abstract

In altermagnets, time-reversal symmetry breaking spin-polarizes electronic states, while total magnetization remains zero. In addition, at altermagnetic surfaces Rashba-spin orbit coupling is activated due to broken inversion symmetry, introducing a competing spin-momentum locking interaction. Here we show that their interplay leads to the formation of complex, chiral spin textures that offer novel, non-linear spin-to-charge conversion properties. Whereas altermagnetic order suppresses the canonical linear in-plane Rashba-Edelstein response, we establish the presence of an \textit{anomalous} transversal Edelstein effect for planar applied electric and magnetic field, or alternatively, an in-plane magnetization. Additionally, we predict a purely electric-field-driven non-linear out-of-plane magnetization. We compute the anomalous response within a general altermagnet $d$-wave model, with parameters extracted from the ab-initio electronic structure of an altermagnetic bilayer. Our results suggest altermagnetic surfaces as a promising platform for unconventional spintronic functionalities.

11 pages, 9 figures

References in corpus (43)

• Altermagnetism: spin-momentum locked phase protected by non-relativistic symmetries
• Tunable Rashba spin-orbit interaction at oxide interfaces
• 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
• Highly efficient and tuneable spin-to-charge conversion through Rashba coupling at oxide interfaces
• Momentum-Dependent Spin Splitting by Collinear Antiferromagnetic Ordering
• Multifunctional Antiferromagnetic Materials with Giant Piezomagnetism and Noncollinear Spin Current
• Observation of spin splitting torque in a collinear antiferromagnet RuO2
• Spin current generation in organic antiferromagnets
• Tilted spin current generated by the collinear antiferromagnet RuO2
• Direct observation of altermagnetic band splitting in CrSb thin films
• Spontaneous anomalous Hall effect arising from an unconventional compensated magnetic phase in a semiconductor
• Prediction of unconventional magnetism in doped FeSb2
• Discovery of a metallic room-temperature d-wave altermagnet KV2Se2O
• Spin-orbit torques in locally and globally non-centrosymmetric crystals: Antiferromagnets and ferromagnets
• Absence of altermagnetic spin splitting character in rutile oxide RuO${}_2$
• Unification of Nonlinear Anomalous Hall Effect and Nonreciprocal Magnetoresistance in Metals by the Quantum Geometry
• Crystal-symmetry-paired spin-valley locking in a layered room-temperature antiferromagnet
• Altermagnetism with Non-collinear Spins
• Spin-split collinear antiferromagnets: a large-scale ab-initio study
• Perovskite as a spin current generator
• Observation of Spin Splitting in Room-Temperature Metallic Antiferromagnet CrSb
• Spin and orbital Edelstein effect in an oxide two-dimensional electron gas: theory and application to AlO${}_x$/SrTiO${}_3$
• Intraband and interband spin-orbit torques in non-centrosymmetric ferromagnets
• Altermagnetic anomalous Hall effect emerging from electronic correlations
• Intrinsic Nonlinear Spin Magnetoelectricity in Centrosymmetric Magnets
• Interplay of altermagnetism and weak ferromagnetism in two-dimensional RuF${}_4$
• Topological Weyl Altermagnetism in CrSb
• Observation of surface Fermi arcs in altermagnetic Weyl semimetal CrSb
• Fermi-liquid behavior of non-altermagnetic RuO${}_2$
• Light-Induced Static Magnetization: Nonlinear Edelstein Effect
• Staggered Dzyaloshinskii-Moriya inducing weak ferromagnetism in centrosymmetric altermagnets and weak ferrimagnetism in noncentrosymmetric altermagnets
• Crystal structure and absence of magnetic order in single crystalline RuO${}_2$
• Magneto-optical Kerr effect and magnetoelasticity in weak ferromagnetic RuF${}_4$ monolayer
• RKKY interaction in Rashba altermagnets
• Equivalence of semiclassical and response theories for second-order nonlinear ac Hall effects
• Tunable spin and orbital Edelstein effect at (111) LaAlO${}_3$/SrTiO${}_3$ interface
• Spin Hall and Edelstein Effects in Novel Chiral Noncollinear Altermagnets
• Large nonlinear Hall effect and Berry curvature in KTaO3 based two-dimensional electron gas
• Gate tunable anomalous Hall effect: a Berry curvature probe at oxides interfaces
• Strain-induced topological phase transition at (111) SrTiO${}_3$-based heterostructures

Cited by in corpus (5)

• Exploration of Altermagnetism in $\mathrm{Ru}{\mathrm{O}}_2$
• Relativistic spin-momentum locking in ferromagnets
• Boltzmann theory of the inverse Edelstein effect in a two-dimensional Rashba gas
• D-Wave Phonon Angular Momentum Texture in Altermagnets by Magnon-Phonon Hybridization
• Nonlinear opto-magnetic signature of d-wave altermagnets