Nonreciprocal transport in a room-temperature chiral magnet

作     者：Nakamura, Daisuke Lee, Mu-Kun Karube, Kosuke Mochizuki, Masahito Nagaosa, Naoto Tokura, Yoshinori Taguchi, Yasujiro 

作者机构： Wako351-0198 Japan Department of Applied Physics Waseda University Okubo Shinjuku-ku Tokyo169-8555 Japan Fundamental Quantum Science TRIP Headquarters RIKEN Wako351-0198 Japan Tokyo College Department of Applied Physics University of Tokyo Tokyo113-8656 Japan Baton Zone Program RIKEN Wako351-0198 Japan 

出 版 物：《arXiv》 (arXiv)

年 卷 期：2024年

核心收录：

主　　题：Spin fluctuations 

摘      要：Chiral magnets under broken time-reversal symmetry can give rise to rectification of moving electrons, called nonreciprocal transport. Several mechanisms, such as the spin-fluctuation-induced chiral scattering and asymmetry in the electronic band dispersion with and without the relativistic spin-orbit interaction, have been proposed, but clear identification as well as theoretical description of these different contributions are desired for full understanding of nonreciprocal transport phenomena. Here, we investigate a chiral magnet Co8Zn9Mn3 and find the nonreciprocal transport phenomena consisting of different contributions with distinct field- and temperature-dependence across the magnetic phase diagram over a wide temperature range including above room-temperature. We successfully separate the nonreciprocal resistivity into different components and identify their mechanisms as spin-fluctuation-induced chiral scattering and band asymmetry in a single material with the help of theoretical calculations. Copyright © 2024, The Authors. All rights reserved.