Robust Second-Order Topological Insulators with Giant Valley Polarization in Two-Dimensional Honeycomb Ferromagnets
Runhan Li, Ning Mao, Xinming Wu, Baibiao Huang, Ying Dai, Chengwang Niu
Abstract
and Janus VSSe monolayers as experimentally feasible candidates of predicted robust SOTIs with the emergence of nontrivial corner states along different magnetization directions. Moreover, under out-of-plane magnetization, we unexpectedly point out that the valley polarization of SOTIs can be huge and much larger than that of the known ferrovalley materials, opening up a technological avenue to bridge the valleytronics and higher-order topology with high possibility of innovative applications in topological spintronics and valleytronics.
Topics & Concepts
SpintronicsValleytronicsMagnetizationTopology (electrical circuits)Topological insulatorCondensed matter physicsFerromagnetismPhysicsMagnetic fieldQuantum mechanicsMathematicsCombinatoricsTopological Materials and PhenomenaAdvanced Condensed Matter PhysicsQuantum many-body systems