Layer-coupled corner states in two-dimensional topological multiferroics
Runhan Li, Xiaorong Zou, Yingxi Bai, Zhiqi Chen, Baibiao Huang, Ying Dai, Chengwang Niu
Abstract
(X = C, N) as 2D second-order topological insulators with intrinsic ferroelectricity. Moreover, the topological corner states strongly couple with the layer degree of freedom, and, remarkably, ferroelectricity provides a nonvolatile handle to manipulate the layer-polarized corner states. These findings open an avenue for the manipulation of second-order topological states and establish a bridge between ferroelectricity and nontrivial topology.
Topics & Concepts
MultiferroicsFerroelectricityTopological insulatorPolarization (electrochemistry)Topology (electrical circuits)Condensed matter physicsMaterials sciencePhysicsOptoelectronicsChemistryMathematicsDielectricPhysical chemistryCombinatoricsTopological Materials and PhenomenaMultiferroics and related materialsFerroelectric and Piezoelectric Materials