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Realization of unpinned two-dimensional dirac states in antimony atomic layers.
Lu, Qiangsheng; Cook, Jacob; Zhang, Xiaoqian; Chen, Kyle Y; Snyder, Matthew; Nguyen, Duy Tung; Reddy, P V Sreenivasa; Qin, Bingchao; Zhan, Shaoping; Zhao, Li-Dong; Kowalczyk, Pawel J; Brown, Simon A; Chiang, Tai-Chang; Yang, Shengyuan A; Chang, Tay-Rong; Bian, Guang.
Afiliación
  • Lu Q; Department of Physics and Astronomy, University of Missouri, Columbia, MO, 65211, USA.
  • Cook J; Department of Physics and Astronomy, University of Missouri, Columbia, MO, 65211, USA.
  • Zhang X; Department of Physics and Astronomy, University of Missouri, Columbia, MO, 65211, USA.
  • Chen KY; Rock Bridge High School, Columbia, MO, 65203, USA.
  • Snyder M; Department of Physics and Astronomy, University of Missouri, Columbia, MO, 65211, USA.
  • Nguyen DT; Department of Physics and Astronomy, University of Missouri, Columbia, MO, 65211, USA.
  • Reddy PVS; Department of Physics, National Cheng Kung University, Tainan, 701, Taiwan.
  • Qin B; School of Materials Science and Engineering, Beihang University, Beijing, 100191, China.
  • Zhan S; School of Materials Science and Engineering, Beihang University, Beijing, 100191, China.
  • Zhao LD; School of Materials Science and Engineering, Beihang University, Beijing, 100191, China.
  • Kowalczyk PJ; Department of Solid State Physics, Faculty of Physics and Applied Informatics, University of Lodz, 90-236 Lodz, Pomorska, 149/153, Poland. pawel.kowalczyk@uni.lodz.pl.
  • Brown SA; The MacDiarmid Institute for Advanced Materials and Nanotechnology, School of Physical and Chemical Sciences, University of Canterbury, Private Bag 4800, Christchurch, 8140, New Zealand.
  • Chiang TC; Department of Physics, University of Illinois at Urbana-Champaign, Urbana, IL, 61801-3080, USA.
  • Yang SA; Frederick Seitz Materials Research Laboratory, University of Illinois at Urbana-Champaign, 104 South Goodwin Avenue, Urbana, IL, 61801-2902, USA.
  • Chang TR; Research Laboratory for Quantum Materials, Singapore University of Technology and Design, Singapore, 487372, Singapore.
  • Bian G; Department of Physics, National Cheng Kung University, Tainan, 701, Taiwan.
Nat Commun ; 13(1): 4603, 2022 Aug 06.
Article en En | MEDLINE | ID: mdl-35933407
Two-dimensional (2D) Dirac states with linear dispersion have been observed in graphene and on the surface of topological insulators. 2D Dirac states discovered so far are exclusively pinned at high-symmetry points of the Brillouin zone, for example, surface Dirac states at [Formula: see text] in topological insulators Bi2Se(Te)3 and Dirac cones at K and [Formula: see text] points in graphene. The low-energy dispersion of those Dirac states are isotropic due to the constraints of crystal symmetries. In this work, we report the observation of novel 2D Dirac states in antimony atomic layers with phosphorene structure. The Dirac states in the antimony films are located at generic momentum points. This unpinned nature enables versatile ways such as lattice strains to control the locations of the Dirac points in momentum space. In addition, dispersions around the unpinned Dirac points are highly anisotropic due to the reduced symmetry of generic momentum points. The exotic properties of unpinned Dirac states make antimony atomic layers a new type of 2D Dirac semimetals that are distinct from graphene.
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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: 2022 Tipo del documento: Article País de afiliación: Estados Unidos Pais de publicación: Reino Unido
Texto completo
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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: 2022 Tipo del documento: Article País de afiliación: Estados Unidos Pais de publicación: Reino Unido