2021/01/31 by Cong Xiao, Bangguo Xiong, Qian Niu
Materials Science · Physics and Astronomy · #Classical mechanics #Condensed matter physics #Dissipative system #Electric field #Electrical engineering #Magnetic anisotropy #Magnetic field #Magnetic properties of thin films #Magnetization #Magnetization dynamics #Multiferroics and related materials #Orbital magnetization #Physics #Quantum mechanics #Topological Materials and Phenomena #Topology (electrical circuits) #cond-mat.mes-hall
paper · pdf · doi:10.1103/physrevb.104.064433
published as Phys. Rev. B 104, 064433 (2021) · 5 pages 4 figures; revised version with more references that are aware of by us only recently
arxiv created 2021/06/23 · openalex created_date 2021/07/05 · openalex publication_date 2021/08/19 · arxiv updated 2021/08/25 · openalex updated_date 2026/08/06
Established forms of electromagnetic coupling are usually conservative (in insulators) or dissipative (in metals and semiconductors). Here, we point out the possibility of nondissipative electric driving of magnetization dynamics, if the valence electronic states have nontrivial topology in the combined space of crystal momentum and magnetization configuration. We provide a hybrid insulator system to demonstrate that the topology-based nonconservative electrical generalized force is capable of supporting sustained magnetization motion in the presence of Gilbert damping, with quantized and steady energy pumping into magnetization motion from the electric field. We also generalize our results to magnetic textures, and discuss an electric-field-induced Dzyaloshinskii-Moriya interaction which can be nonconservative.