Spin-orbit coupling and linear crossings of dipolar magnons in van der Waals antiferromagnets

Abstract

A magnon spin-orbit coupling, induced by the dipole-dipole interaction, is derived in monoclinic-stacked bilayer honeycomb spin lattice with perpendicular magnetic anisotropy and antiferromagnetic interlayer coupling. Linear crossings are predicted in the magnon spectrum around the band minimum in G valley, as well as in the high frequency range around the zone boundary. The linear crossings in K and K' valleys, which connect the acoustic and optical bands, can be gapped when the intralayer dipole-dipole or Kitaev interactions exceed the interlayer dipole-dipole interaction, resulting in a phase transition from semimetal to insulator. Our results are useful for analyzing the magnon spin dynamics and transport properties in van der Waals antiferromagnet.

arXiv comment10 pages

References in corpus (23)

• Layer-dependent Ferromagnetism in a van der Waals Crystal down to the Monolayer Limit
• Anyons in an exactly solved model and beyond
• Discovery of intrinsic ferromagnetism in 2D van der Waals crystals
• Electronic Structure of Pyrochlore Iridates: From Topological Dirac Metal to Mott Insulator
• Discovery of a Weyl Fermion Semimetal and Topological Fermi Arcs
• Weyl Semimetal in a Topological Insulator Multilayer
• Experimental discovery of Weyl semimetal TaAs
• Stacking-Dependent Magnetism in Bilayer CrI${}_3$
• Electrically controlled long-distance spin transport through an antiferromagnetic insulator
• Giant and nonreciprocal second harmonic generation from layered antiferromagnetism in bilayer CrI3
• Stacking tunable interlayer magnetism in bilayer CrI3
• Interplay between Kitaev interaction and single ion anisotropy in ferromagnetic CrI${}_3$ and CrGeTe${}_3$ monolayers
• Antiferromagnonic Spin Transport from Y${}_3$Fe${}_5$O${}_{12}$ into NiO
• Topological spin excitations in honeycomb ferromagnet CrI${}_3$
• Subterahertz spin pumping from an insulating antiferromagnet
• Dirac Fermions in Antiferromagnetic Semimetal
• Spin-current probe for phase transition in an insulator
• Direct observation of 2D magnons in atomically thin CrI${}_3$
• Two-dimensional Weyl Half Semimetal and Tunable Quantum Anomalous Hall Effect in Monolayer PtCl${}_3$
• Gate-tunable spin waves in antiferromagnetic atomic bilayers
• Antiferromagnetic Domain Wall as Spin Wave Polarizer and Retarder
• Topological magnonics in the two-dimensional van der Waals magnet CrI3
• Dipolar spin waves in uniaxial easy-axis antiferromagnets: A natural topological nodal-line semimetal

Cited by in corpus (3)

• Magnon spin transport around the compensation magnetic field in easy-plane antiferromagnetic insulators
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• Dipolar spin-waves and tunable band gap at the Dirac points in the 2D magnet ErBr3