Colossal angular magnetoresistance in ferrimagnetic nodal-line semiconductors
SCIE
SCOPUS
- Title
- Colossal angular magnetoresistance in ferrimagnetic nodal-line semiconductors
- Authors
- Seo, Junho; De, Chandan; Ha, Hyunsoo; Lee, Ji Eun; Park, Sungyu; Park, Joonbum; Skourski, Yurii; Choi, Eun Sang; Kim, Bongjae; Cho, Gil Young; Yeom, Han Woong; Cheong, Sang-Wook; Kim, Jae Hoon; Yang, Bohm-Jung; Kim, Kyoo; Kim, Jun Sung
- Date Issued
- 2021-11
- Publisher
- NATURE PORTFOLIO
- Abstract
- Efficient magnetic control of electronic conduction is at the heart of spintronic functionality for memory and logic applications(1,2). Magnets with topological band crossings serve as a good material platform for such control, because their topological band degeneracy can be readily tuned by spin configurations, dramatically modulating electronic conduction(3-10). Here we propose that the topological nodal-line degeneracy of spin-polarized bands in magnetic semiconductors induces an extremely large angular response of magnetotransport. Taking a layered ferrimagnet, Mn3Si2Te6, and its derived compounds as a model system, we show that the topological band degeneracy, driven by chiral molecular orbital states, is lifted depending on spin orientation, which leads to a metal-insulator transition in the same ferrimagnetic phase. The resulting variation of angular magnetoresistance with rotating magnetization exceeds a trillion per cent per radian, which we call colossal angular magnetoresistance. Our findings demonstrate that magnetic nodal-line semiconductors are a promising platform for realizing extremely sensitive spin- and orbital-dependent functionalities. A study reports a colossal angular magnetoresistance in the topological magnet Mn3Si2Te6, resulting from a metal-to-insulator transition caused by controlled lifting of a topological band degeneracy, and discusses the key parameters involved.
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/108519
- DOI
- 10.1038/s41586-021-04028-7
- ISSN
- 0028-0836
- Article Type
- Article
- Citation
- NATURE, vol. 599, no. 7886, page. 576 - +, 2021-11
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