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Observation of Weyl fermions in a magnetic non-centrosymmetric crystal.
Sanchez, Daniel S; Chang, Guoqing; Belopolski, Ilya; Lu, Hong; Yin, Jia-Xin; Alidoust, Nasser; Xu, Xitong; Cochran, Tyler A; Zhang, Xiao; Bian, Yi; Zhang, Songtian S; Liu, Yi-Yuan; Ma, Jie; Bian, Guang; Lin, Hsin; Xu, Su-Yang; Jia, Shuang; Hasan, M Zahid.
Afiliación
  • Sanchez DS; Laboratory for Topological Quantum Matter and Advanced Spectroscopy (B7), Department of Physics, Princeton University, Princeton, NJ, 08544, USA.
  • Chang G; Laboratory for Topological Quantum Matter and Advanced Spectroscopy (B7), Department of Physics, Princeton University, Princeton, NJ, 08544, USA.
  • Belopolski I; Laboratory for Topological Quantum Matter and Advanced Spectroscopy (B7), Department of Physics, Princeton University, Princeton, NJ, 08544, USA.
  • Lu H; International Center for Quantum Materials, School of Physics, Peking University, Peking, China.
  • Yin JX; Laboratory for Topological Quantum Matter and Advanced Spectroscopy (B7), Department of Physics, Princeton University, Princeton, NJ, 08544, USA.
  • Alidoust N; Laboratory for Topological Quantum Matter and Advanced Spectroscopy (B7), Department of Physics, Princeton University, Princeton, NJ, 08544, USA.
  • Xu X; Rigetti Computing, Berkeley, CA, 94720, USA.
  • Cochran TA; International Center for Quantum Materials, School of Physics, Peking University, Peking, China.
  • Zhang X; Laboratory for Topological Quantum Matter and Advanced Spectroscopy (B7), Department of Physics, Princeton University, Princeton, NJ, 08544, USA.
  • Bian Y; International Center for Quantum Materials, School of Physics, Peking University, Peking, China.
  • Zhang SS; International Center for Quantum Materials, School of Physics, Peking University, Peking, China.
  • Liu YY; Laboratory for Topological Quantum Matter and Advanced Spectroscopy (B7), Department of Physics, Princeton University, Princeton, NJ, 08544, USA.
  • Ma J; International Center for Quantum Materials, School of Physics, Peking University, Peking, China.
  • Bian G; Key Laboratory of Artificial Structures and Quantum Control, School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai, China.
  • Lin H; Department of Physics and Astronomy, University of Missouri, Columbia, MO, USA.
  • Xu SY; Institute of Physics, Academia Sinica, Taipei, 11529, Taiwan.
  • Jia S; Laboratory for Topological Quantum Matter and Advanced Spectroscopy (B7), Department of Physics, Princeton University, Princeton, NJ, 08544, USA.
  • Hasan MZ; International Center for Quantum Materials, School of Physics, Peking University, Peking, China.
Nat Commun ; 11(1): 3356, 2020 Jul 03.
Article en En | MEDLINE | ID: mdl-32620859
The absence of inversion symmetry in non-centrosymmetric materials has a fundamental role in the emergence of a vast number of fascinating phenomena, like ferroelectricity, second harmonic generation, and Weyl fermions. The removal of time-reversal symmetry in such systems further extends the variety of observable magneto-electric and topological effects. Here we report the striking topological properties in the non-centrosymmetric spin-orbit magnet PrAlGe by combining spectroscopy and transport measurements. By photoemission spectroscopy below the Curie temperature, we observe topological Fermi arcs that correspond to projected topological charges of ±1 in the surface Brillouin zone. In the bulk, we observe the linear energy-dispersion of the Weyl fermions. We further observe a large anomalous Hall response in our magneto-transport measurements, which is understood to arise from diverging bulk Berry curvature fields associated with the Weyl band structure. These results establish a novel Weyl semimetal phase in magnetic non-centrosymmetric PrAlGe.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Nat Commun Asunto de la revista: BIOLOGIA / CIENCIA Año: 2020 Tipo del documento: Article País de afiliación: Estados Unidos 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 Commun Asunto de la revista: BIOLOGIA / CIENCIA Año: 2020 Tipo del documento: Article País de afiliación: Estados Unidos Pais de publicación: Reino Unido