Theoretical realization of rich magnon topology by symmetry-breaking in honeycomb bilayer ferromagnets
arXiv:2007.11692 · doi:10.1016/j.physe.2021.114984
Abstract
We reveal the rich magnon topology in honeycomb bilayer ferromagnets (HBF) induced by the combined effect of interlayer exchange, Dzyaloshinskii-Moriya interaction (DMI), and electrostatic doping (ED). In particular, we present a systematic study of the Hamiltonian non-adiabatic evolution in the HBF parametric space, spanned by the symmetry-breaking terms (DMI and ED) and interlayer exchange. We determine the band closure manifolds which are found to divide the parametric space into six distinct regions, matched with five distinct topological phases and one topologically trivial phase. The characteristic Chern numbers and thermal Hall conductivities are calculated for the topological phases. Edge spectra, dictated by the bulk-edge correspondence, are also analyzed in the nanoribbon version of the model. Both bulk and edge spectra are found to be nonreciprocal as a consequence of ED and edge magnons are observed to counter propagate on opposite edges. The predicted results offer new insights on the manipulation of magnonic Chern numbers and magnon topological transport via experimentally tunable parameters.
References in corpus (50)
- Layer-dependent Ferromagnetism in a van der Waals Crystal down to the Monolayer Limit
- Discovery of intrinsic ferromagnetism in 2D van der Waals crystals
- Gate-tunable Room-temperature Ferromagnetism in Two-dimensional FeGeTe
- Two-dimensional materials from high-throughput computational exfoliation of experimentally known compounds
- Magnetic 2D materials and heterostructures
- Electrical Control of 2D Magnetism in Bilayer CrI3
- Giant Tunneling Magnetoresistance in Spin-Filter van der Waals Heterostructures
- Controlling magnetism in 2D CrI3 by electrostatic doping
- Electric-field switching of two-dimensional van der Waals magnets
- Observation of the Magnon Hall Effect
- On the origin of magnetic anisotropy in two dimensional CrI
- Theory of Thermal Hall Effect in Quantum Magnets
- Pressure-controlled interlayer magnetism in atomically thin CrI3
- Direct photoluminescence probing of ferromagnetism in monolayer two-dimensional CrBr3
- Topological Magnon Insulator in Insulating Ferromagnet
- Evolution of interlayer and intralayer magnetism in three atomically thin chromium trihalides
- Topological spin excitations in honeycomb ferromagnet CrI
- Spin Nernst Effect of Magnons in Collinear Antiferromagnets
- A first theoretical realization of honeycomb topological magnon insulator
- Magnon spin Nernst effect in antiferromagnets
- Weyl magnons in breathing pyrochlore antiferromagnets
- Fundamental Spin Interactions Underlying the Magnetic Anisotropy in the Kitaev Ferromagnet CrI
- Spin wave nonreciprocity for logic device applications
- Magnon transport in quasi-two-dimensional van der Waals antiferromagnets
- Chiral spin-wave edge modes in dipolar magnetic thin films
- Tunable magnon Weyl points in ferromagnetic pyrochlores
- Raman fingerprint of two terahertz spin wave branches in a two-dimensional honeycomb Ising ferromagnet
- Signature of magnon Nernst effect in an antiferromagnetic insulator
- Stacking Domain Wall Magnons in Twisted van der Waals Magnets
- Magnonic quantum Hall effect and Wiedemann-Franz law
- Non-Hermitian topology of spontaneous magnon decay
- Topological magnon insulator spin excitations in the two-dimensional ferromagnet CrBr
- Magnon Hall effect in AB-stacked bilayer honeycomb quantum magnets
- Nonreciprocal Magnon by Symmetric Anisotropic Exchange Interaction in Honeycomb Antiferromagnet
- Topological magnon amplification
- Non-Hermiticity and topological invariants of magnon Bogoliubov-de Gennes systems
- Topological magnon bands in the zigzag and stripy phases of antiferromagnetic honeycomb lattice
- Magnonics: Spin Waves Connecting Charges, Spins and Photons
- Magnon valley Hall effect in CrI3-based vdW heterostructures
- Moiré magnons in twisted bilayer magnets with collinear order
- Dirac Magnon Nodal Loops in Quasi-2D Quantum Magnets
- Magnon magic angles and tunable Hall conductivity in 2D twisted ferromagnetic bilayers
- Topological Valley Transport of Gapped Dirac Magnons in Bilayer Ferromagnetic Insulators
- Edge on-site potential effects in a honeycomb topological magnon insulator
- Magnonic Floquet Quantum Spin Hall Insulator in Bilayer Collinear Antiferromagnets
- A new class of nonreciprocal spin waves on the edges of 2D antiferromagnetic honeycomb nanoribbons
- Valley-polarized domain wall magnons in 2D ferromagnetic bilayers
- Asymmetric dynamics of edge exchange spin waves in honeycomb nanoribbons with zigzag and bearded edges boundaries
- Discretized dynamics of exchange spin wave bulk and edge modes in honeycomb nanoribbons with armchair edge boundaries
- Hardcore bosonic domain walls on honeycomb lattice
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- Momentum-space theory for topological magnons in 2D ferromagnetic skyrmion lattices
- Chirality-selective topological magnon phase transition induced by interplay of anisotropic exchange interactions in honeycomb ferromagnet
- Multiple topological phases of magnons induced by Dzyaloshinskii-Moriya and pseudodipolar anisotropic exchange interactions in Kagome ferromagnets