Non-reciprocal magnons in a two dimensional crystal with off-plane magnetization

Abstract

Non reciprocal spin waves have a chiral asymmetry so that their energy is different for two opposite wave vectors. They are found in atomically thin ferromagnetic overlayers with in plane magnetization and are linked to the anti-symmetric Dzyaloshinskii-Moriya surface exchange. We use an itinerant fermion theory based on first principles calculations to predict that non-reciprocal magnons can occur in Fe${}_3$GeTe${}_2$, the first stand alone metallic two dimensional crystal with off-plane magnetization. We find that both the energy and lifetime of magnons are non-reciprocal and we predict that acoustic magnons can have lifetimes up to hundreds of picoseconds, orders of magnitude larger than in other conducting magnets.

5 pages, 4 figure; supplemental material: 5 pages, 5 figures

References in corpus (19)

• Quantum Spin Hall Effect in Graphene
• Advanced capabilities for materials modelling with Quantum ESPRESSO
• Coupled spin and valley physics in monolayers of MoS2 and other group-VI dichalcogenides
• Gate-tunable Room-temperature Ferromagnetism in Two-dimensional Fe${}_3$GeTe${}_2$
• Two-Dimensional Itinerant Ising Ferromagnetism in Atomically thin Fe3GeTe2
• Observation of Magnetic Skyrmion Bubbles in a van der Waals ferromagnet Fe3GeTe2
• Asymmetric Spin-wave Dispersion on Fe(110): Direct Evidence of Dzyaloshinskii--Moriya Interaction
• Topological magnetic-spin textures in two-dimensional van der Waals Cr2Ge2Te6
• Spin wave nonreciprocity for logic device applications
• Chiral asymmetry of the spin-wave spectra in ultrathin magnetic films
• Large anomalous Nernst effect in a van der Waals ferromagnet Fe${}_3$GeTe${}_2$
• The Final Chapter In The Saga Of YIG
• Different dimensionality trends in the Landau damping of magnons in iron, cobalt and nickel: time dependent density functional study
• Spin Orbit Coupling and Spin Waves in Ultrathin Ferromagnets: The Spin Wave Rashba Effect
• On the Hohenberg-Mermin-Wagner theorem and its limitations
• Toward Realistic Amorphous Topological Insulators
• Magnetic excitations in the quasi-2D ferromagnet Fe3-xGeTe2 measured with inelastic neutron scattering
• Topological magnons in CrI${}_3$ monolayers: an itinerant fermion description
• Long range dynamical coupling between magnetic adatoms mediated by a 2D topological insulator

Cited by in corpus (17)

• Disentangling orbital and valley Hall effects in bilayers of transition metal dichalcogenides
• Quantum Nanophotonics in Two-Dimensional Materials
• Magnetism and Spin Dynamics in Room-Temperature van der Waals Magnet Fe${}_5$GeTe${}_2$
• Connecting Higher-Order Topology with the Orbital Hall Effect in Monolayers of Transition Metal Dichalcogenides
• Dynamic transverse magnetic susceptibility in the projector augmented-wave method. Application to Fe, Ni, and Co
• Tuning the magnetic interactions in van der Waals Fe${}_3$GeTe${}_2$ heterostructures: A comparative study of \textit{ab initio} methods
• Orbital magnetoelectric effect in nanoribbons of transition metal dichalcogenides
• Magnetic domain walls of the van der Waals material Fe${}_3$GeTe${}_2$
• Magnons in antiferromagnetic bcc-Cr and Cr${}_2$O${}_3$ from time-dependent density functional theory
• Relating spin-polarized STM imaging and inelastic neutron scattering in the van-der-Waals ferromagnet Fe3GeTe2
• Ultrathin films of black phosphorus as suitable platforms for unambiguous observation of the orbital Hall effect
• Monte Carlo studies of skyrmion stabilization under geometric confinement and uniaxial strain
• Unraveling the Complexity of the Dzyaloshinskii-Moriya Interaction in Layered Magnets: The Full Magnitude and Chirality Control
• Minority magnons and mode branching in monolayer Fe${}_3$GeTe${}_2$
• Nonreciprocal magnons in layered antiferromagnets VPX3(X =S,Se,Te)
• Ubiquity of the spin-orbit induced magnon nonreciprocity in ultrathin ferromagnets
• Giant orbital magnetization in two-dimensional materials