Nonlinear opto-magnetic signature of d-wave altermagnets

Abstract

Altermagnetism, a recently discovered collinear magnetic order with net zero magnetization but exhibiting spin-splitting band structure, has attracted much research interest due to the rich fundamental physics and possible applications. In this work, we investigate the opto-magnetic response of $d$-wave altermagnets, focusing on the inverse Cotton-Mouton effect--the induction of static magnetization via linearly polarized light. We find that the direction of the induced magnetization is determined by the Néel vector. Moreover, its magnitude exhibits a periodic dependence on the polarization angle of the incident light, a hallmark of the system's symmetry. Our findings demonstrate that the inverse Cotton-Mouton effect offers a direct method both for detecting $d$-wave altermagnets and for probing their intrinsic properties.

7+2 pages, 4+2 figures

References in corpus (34)

• Altermagnetism: spin-momentum locked phase protected by non-relativistic symmetries
• Multifunctional Antiferromagnetic Materials with Giant Piezomagnetism and Noncollinear Spin Current
• Broken Kramers' degeneracy in altermagnetic MnTe
• Giant and tunneling magnetoresistance effects from anisotropic and valley-dependent spin-momentum interactions in antiferromagnets
• Tilted spin current generated by the collinear antiferromagnet RuO2
• Altermagnetism: Exploring New Frontiers in Magnetism and Spintronics
• Prediction of unconventional magnetism in doped FeSb2
• Observation of plaid-like spin splitting in a noncoplanar antiferromagnet
• Spin-group symmetry in magnetic materials with negligible spin-orbit coupling
• Large band-splitting in $g$-wave type altermagnet CrSb
• Fermi liquid instabilities in the spin channel
• Discovery of a metallic room-temperature d-wave altermagnet KV2Se2O
• Enumeration and representation theory of spin space groups
• Landau Theory of Altermagnetism
• Magnetic octupoles as the order parameter for unconventional antiferromagnetism
• Chiral-Split Magnon in Altermagnetic MnTe
• Optical determination of the Neel vector in a CuMnAs thin-film antiferromagnet
• Crystal-symmetry-paired spin-valley locking in a layered room-temperature antiferromagnet
• Spin Space Groups: Full Classification and Applications
• Enumeration of spin-space groups: Towards a complete description of symmetries of magnetic orders
• Minimal Models for Altermagnetism
• Spontaneous Formation of Altermagnetism from Orbital Ordering
• Intrinsic anomalous Hall effect in altermagnets
• Spin and Orbital Magnetism by Light in Rutile Altermagnets
• The Crystallographic Spin Point Groups and their Representations
• Altermagnetic splitting of magnons in hematite ($\alpha$-Fe${}_2$O${}_3$)
• Nonlinear Magnetoelectric Effect under Magnetic Octupole Order: Its Application to a $d$-Wave Altermagnet and a Pyrochlore Lattice with All-In/All-Out Magnetic Order
• Bulk photovoltaic effects in altermagnets
• Controlling photo-excited electron-spin by light-polarization in ultrafast-pumped altermagnets
• Spontaneous magnon decay in two-dimensional altermagnets
• Non-linear anomalous Edelstein response at altermagnetic interfaces
• Ultrafast controlling net magnetization in g-wave altermagnets via laser fields
• Ultrafast electron dynamics in altermagnetic materials
• Crystal tensor properties of magnetic materials with and without spin-orbit coupling. Application of spin point groups as approximate symmetries