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Large anomalous Hall current induced by topological nodal lines in a ferromagnetic van der Waals semimetal.
Kim, Kyoo; Seo, Junho; Lee, Eunwoo; Ko, K-T; Kim, B S; Jang, Bo Gyu; Ok, Jong Mok; Lee, Jinwon; Jo, Youn Jung; Kang, Woun; Shim, Ji Hoon; Kim, C; Yeom, Han Woong; Il Min, Byung; Yang, Bohm-Jung; Kim, Jun Sung.
Afiliación
  • Kim K; Department of Physics, Pohang University of Science and Technology, Pohang, Republic of Korea.
  • Seo J; Max Planck POSTECH/Hsinchu Center for Complex Phase Materials, Pohang University of Science and Technology, Pohang, Republic of Korea.
  • Lee E; Department of Physics, Pohang University of Science and Technology, Pohang, Republic of Korea.
  • Ko KT; Center for Artificial Low Dimensional Electronic Systems, Institute for Basic Science (IBS), Pohang, Republic of Korea.
  • Kim BS; Department of Physics and Astronomy, Seoul National University, Seoul, Republic of Korea.
  • Jang BG; Center for Correlated Electron Systems, Institute for Basic Science (IBS), Seoul, Republic of Korea.
  • Ok JM; Center for Theoretical Physics (CTP), Seoul National University, Seoul, Republic of Korea.
  • Lee J; Department of Physics, Pohang University of Science and Technology, Pohang, Republic of Korea.
  • Jo YJ; Max Planck POSTECH/Hsinchu Center for Complex Phase Materials, Pohang University of Science and Technology, Pohang, Republic of Korea.
  • Kang W; Department of Physics and Astronomy, Seoul National University, Seoul, Republic of Korea.
  • Shim JH; Center for Correlated Electron Systems, Institute for Basic Science (IBS), Seoul, Republic of Korea.
  • Kim C; Department of Chemistry, Pohang University of Science and Technology, Pohang, Republic of Korea.
  • Yeom HW; Department of Physics, Pohang University of Science and Technology, Pohang, Republic of Korea.
  • Il Min B; Center for Artificial Low Dimensional Electronic Systems, Institute for Basic Science (IBS), Pohang, Republic of Korea.
  • Yang BJ; Department of Physics, Pohang University of Science and Technology, Pohang, Republic of Korea.
  • Kim JS; Center for Artificial Low Dimensional Electronic Systems, Institute for Basic Science (IBS), Pohang, Republic of Korea.
Nat Mater ; 17(9): 794-799, 2018 09.
Article en En | MEDLINE | ID: mdl-30013056
Topological semimetals host electronic structures with several band-contact points or lines and are generally expected to exhibit strong topological responses. Up to now, most work has been limited to non-magnetic materials and the interplay between topology and magnetism in this class of quantum materials has been largely unexplored. Here we utilize theoretical calculations, magnetotransport and angle-resolved photoemission spectroscopy to propose Fe3GeTe2, a van der Waals material, as a candidate ferromagnetic (FM) nodal line semimetal. We find that the spin degree of freedom is fully quenched by the large FM polarization, but the line degeneracy is protected by crystalline symmetries that connect two orbitals in adjacent layers. This orbital-driven nodal line is tunable by spin orientation due to spin-orbit coupling and produces a large Berry curvature, which leads to a large anomalous Hall current, angle and factor. These results demonstrate that FM topological semimetals hold significant potential for spin- and orbital-dependent electronic functionalities.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Nat Mater Asunto de la revista: CIENCIA / QUIMICA Año: 2018 Tipo del documento: Article Pais de publicación: Reino Unido
Texto completo
Añadir a Mi BVS
Imprimir
XML
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Nat Mater Asunto de la revista: CIENCIA / QUIMICA Año: 2018 Tipo del documento: Article Pais de publicación: Reino Unido