Band asymmetry-driven nonreciprocal electronic transport in a helimagnetic semimetal α-EuP3

• 成果类型: Article
• 署名作者: Mayo, Alex Hiro; Deaconu, Darius - Alexandru; Masuda, Hidetoshi; Nii, Yoichi; Takahashi, Hidefumi; Belosludov, Rodion Vladimirovich; Ishiwata, Shintaro; Bahramy, Mohammad Saeed; Onose, Yoshinori
• 署名单位: Tohoku University; University of Manchester; University of Osaka
• 刊物名称: PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
• ISSN/ISSBN: 0027-15076
• DOI: 10.1073/pnas.2405839122
• 发表日期: 2025-01-28
• 关键词: wave

摘要

Chiral magnetic textures give rise to unconventional magnetotransport phenomena such as the topological Hall effect and nonreciprocal electronic transport. While the correspondence between topology or symmetry of chiral magnetic structures and such transport phenomena has been well established, a microscopic understanding based on the spin- dependent band structure in momentum space remains elusive. Here, we demonstrate how a chiral magnetic superstructure introduces an asymmetry in the electronic band structure and triggers a nonreciprocal electronic transport in a centrosymmetric helimagnet alpha- EuP3. The magnetic structure of alpha- EuP3 is highly tunable by a magnetic field and closely coupled to its semimetallic electronic band structure, enabling a systematic study across chiral and achiral magnetic phases on the correspondence between nonreciprocal transport and electronic band asymmetry. Our findings reveal how a microscopic change in the magnetic configuration of charge carriers can lead to nonreciprocal electronic transport, paving the way for designing chiral magnets with desirable properties.