Transversal transport of magnons in a modified Lieb lattice
arXiv:2210.07757 · doi:10.1016/j.physb.2023.414721
Abstract
We studied a two-band magnon insulating model whose geometry is that of a modified Lieb lattice in which one of the sites was removed. Anisotropic ferromagnetic exchange interactions exist between the three nearest neighbors, and the anisotropy opens a gap in the magnon energy band structure. A non-vanishing Berry curvature is induced by a Dzyaloshinskii-Moriya interaction (DMI). The topology of the bands is trivial (in the sense of a null Chern number), but the finite Berry curvature induces Hall-like transport effects whose coefficients were calculated. Their dependence on temperature was studied and shows a resemblance with other magnon insulating systems found in the literature. The dependence on exchange couplings, DMI parameter, and external magnetic field was also investigated.
References in corpus (11)
- Spin current and magneto-electric effect in non-collinear magnets
- Dissipationless Quantum Spin Current at Room Temperature
- Observation of the Magnon Hall Effect
- Berry phase effect in anomalous thermoelectric transport
- Theoretical prediction of rotating magnon wavepacket in ferromagnets
- Engineering Time-Reversal Invariant Topological Insulators With Ultra-Cold Atoms
- Realistic Time-Reversal Invariant Topological Insulators With Neutral Atoms
- Topological Insulators on the Lieb and Perovskite Lattices
- Thermal Hall Effect of Spins in a Paramagnet
- Multitude of Topological Phase Transitions in Bipartite Dice and Lieb Lattices with Interacting Electrons and Rashba Coupling
- Metal-insulator transition in the disordered Hubbard model of the Lieb lattice