Work

Band Topology and Dynamic Multiferroicity Induced from Dynamical Dzyaloshinskii-Moriya Interactions in Centrosymmetric Lattices

Year: 2025

Type: article

Abstract: We develop a theory of a dynamical Dzyaloshinskii-Moriya interaction (dDMI) in centrosymmetric crystals by generally considering the vibration of both cations and anions. It gives rise to an antisymmetric spin-lattice coupling, inducing magnon-phonon hybridized topological excitations. Moreover, we find that this dDMI naturally exhibits a magnetoelectric feature, leading to the presence of dynamic multiferroicity with finite toroidal moment distribution in the momentum space. By comparing toroidal moments with band skyrmion structure, we reveal the intrinsic connection between band topology and dynamic multiferroicity through the dDMI.

Source: Physical Review Letters

DOI: 10.1103/sfvl-3qrg

Authors: Bowen Ma, Z. D. Wang

Institutions: Quantum Science Center of Guangdong-Hong Kong-Macao Greater Bay Area, University of Hong Kong, South China Normal University

Language: English

Topic: Multiferroics and related materials

Subfield: Electronic, Optical and Magnetic Materials

Field: Materials Science

Domain: Physical Sciences

Open Access status: green

Funders: National Natural Science Foundation of China, Research Grants Council, University Grants Committee

Award: G374501126