Plasmon-magnon interactions in two-dimensional honeycomb magnets

Abstract

Two-dimensional honeycomb ferromagnets offer the unprecedented opportunity to study interactions between collective modes that in standard bulk ferromagnets do not cross paths. Indeed, they harbor an optical spin-wave branch, i.e. a spin wave which disperses weakly near the Brillouin zone center. When doped with free carriers, they also host the typical gapless plasmonic mode of 2D itinerant electron/hole systems. When the plasmon branch meets the optical spin-wave branch, energy and momentum matching occurs, paving the way for interactions between the charge and spin sector. In this Letter we present a microscopic theory of such plasmon-magnon interactions, which is based on a double random phase approximation. We comment on the possibility to unveil this physics in recently isolated 2D honeycomb magnets such as ${\mathrm{Cr}}_2{\mathrm{Ge}}_2{\mathrm{Te}}_6$.

arXiv commentMain text: 7 pages; Supplemental Material: 10 pages

References in corpus (35)

• Electric Field Effect in Atomically Thin Carbon Films
• Two-Dimensional Gas of Massless Dirac Fermions in Graphene
• Experimental Observation of Quantum Hall Effect and Berry's Phase in Graphene
• Two Dimensional Atomic Crystals
• Van der Waals heterostructures
• $Z_2$ Topological Order and the Quantum Spin Hall Effect
• Layer-dependent Ferromagnetism in a van der Waals Crystal down to the Monolayer Limit
• Discovery of intrinsic ferromagnetism in 2D van der Waals crystals
• Graphene plasmonics
• Magnetic 2D materials and heterostructures
• Polaritons in layered 2D materials
• Highly confined low-loss plasmons in graphene-boron nitride heterostructures
• Half-metallic ferromagnets: From band structure to many-body effects
• Electric-field control of magnetism in few-layered van der Waals magnet
• Quantum spin Hall effect in a transition metal oxide Na2IrO3
• Tuning quantum non-local effects in graphene plasmonics
• Ultra-confined acoustic THz graphene plasmons revealed by photocurrent nanoscopy
• Topological spin excitations in honeycomb ferromagnet CrI${}_3$
• A first theoretical realization of honeycomb topological magnon insulator
• Ab initio analysis of the tight-binding parameters and magnetic interactions in Na2IrO3
• Direct observation of 2D magnons in atomically thin CrI${}_3$
• Magnetic Two-Dimensional Chromium Trihalides: A Theoretical Perspective
• Position and momentum mapping of vibrations in graphene nanostructures in the electron microscope
• Gate-tunable spin waves in antiferromagnetic atomic bilayers
• Magnon Dirac materials
• Quantum Nanophotonics in Two-Dimensional Materials
• Strong phonon-plasmon coupled modes in the graphene/silicon carbide heterosystem
• On the self-consistent spin-wave theory of layered Heisenberg magnets
• Collective modes and terahertz near-field response of superconductors
• Temperature dependences of resistivity and magnetoresistivity for half-metallic ferromagnets
• Electronic structure and magnetic properties of few-layer Cr${}_2$Ge${}_2$Te${}_6$: the key role of nonlocal electron-electron interaction effects
• Topological spin-plasma waves
• Plasmonic Quantum Dots in Twisted Bilayer Graphene
• Spin waves and stability of zigzag order in the Hubbard model with spin-dependent hopping terms - Application to the honeycomb lattice compounds $\mathrm{N}{\mathrm{a}}_2\mathrm{Ir}{\mathrm{O}}_3$ and $\alpha -\mathrm{RuC}{\mathrm{l}}_3$
• Semiclassical theory for plasmons in spatially inhomogeneous media

Cited by in corpus (14)

• Tutorial: Nonlinear magnonics
• Magnon-Plasmon Hybridization Mediated by Spin-Orbit Interaction in Magnetic Materials
• Polaritonic Quantum Matter
• Fundamentals and applications of Van der Waals magnets in magnon spintronics
• Electrical tuning of the magnetic properties of 2D magnets: the case of ${\mathrm{Cr}}_2{\mathrm{Ge}}_2{\mathrm{Te}}_6$
• Two-Step Electronic Response to Magnetic Ordering in a van der Waals Ferromagnet
• Magnons from time-dependent density-functional perturbation theory and nonempirical Hubbard functionals
• Chiral magnon-polaron edge states in Heisenberg-Kitaev magnets
• Impact of spin torques and spin pumping phenomena on magnon-plasmon polaritons in antiferromagnetic insulator-semiconductor heterostructures
• Optical properties, plasmons, and orbital Skyrme textures in twisted TMDs
• Comparative study of magnetic exchange parameters and magnon dispersions in NiO and MnO from first principles
• Magnon bands and transverse transport in a proposed two-dimensional $C{u}_2{F}_5$ ferrimagnet
• Coupling of plasmons to the two-magnon continuum in antiferromagnets
• Topological Magnon-Plasmon Hybrids