Topological magnon insulators in two-dimensional van der Waals ferromagnets CrSiTe <sub>3</sub> and CrGeTe <sub>3</sub> : Toward intrinsic gap-tunability
Fengfeng Zhu, Lichuan Zhang, Xiao Wang, Flaviano José dos Santos, Junda Song, Thomas J. Mueller, K. Schmalzl, W. Schmidt, A. Ivanov, J. T. Park, J. Xu, Jie Ma, Samir Lounis, Stefan Blügel, Yuriy Mokrousov, Yixi Su, Thomas Brückel
Abstract
(X = Si, Ge) compounds. The nontrivial nature and intrinsic tunability of the gap opening at the magnon band-crossing Dirac points are confirmed, while the emergence of the corresponding in-gap topological edge states is demonstrated theoretically. The realization of topological magnon insulators with intrinsic gap-unability in this class of remarkable 2D materials will undoubtedly lead to new and fascinating technological applications in the domain of magnonics and topological spintronics.
Topics & Concepts
MagnonSpintronicsRealization (probability)Topological insulatorPhysicsFerromagnetismMagnonicsCondensed matter physicsTopology (electrical circuits)Spin (aerodynamics)van der Waals forceQuantum mechanicsSpin polarizationSpin Hall effectCombinatoricsThermodynamicsMathematicsMoleculeStatisticsElectronTopological Materials and PhenomenaAdvanced Condensed Matter PhysicsGraphene research and applications