Direct Observation of the Fermi Arc Surface State in the Three-Dimensional Dirac Semimetal Na$_{3}$Bi
ORAL
Abstract
The three dimensional (3D) Dirac semimetals have linearly dispersive 3D Dirac nodes where the conduction and valence bands connect to each other. Here we report the direct observation of the linearly dispersive 3D bulk Dirac points at the natural (001) cleaving surface of Na$_{3}$Bi single crystal by high resolution ARPES. In addition, we have directly observed two separated 3D bulk Dirac nodes by elaborately cleaving Na$_{3}$Bi samples at a non-natural-cleavage (100) crystalline surface. We further unveil the unusual Fermi-arc surface states connecting the two 3D Dirac nodes. At this unique (100) crystalline surface, the identification of the 3D Dirac semimetal state in Na$_{3}$Bi paves the way for systematically exploring rich exotic topological physics such as topological insulator and Weyl semimetal state.
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Authors
Aiji Liang
Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
Zhijun Wang
Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
Chaoyu Chen
Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
Youguo Shi
Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
CAS
Beijing National Laboratory for Condensed Matter Physics \& Institute of Physics, Chinese Academy of Science
Hemian Yi
Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
Ya Feng
Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
Zhuojin Xie
Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
Shaolong He
Chinese Academy of Sci (CAS)
Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
Junfeng He
Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
Boston College
Yingying Peng
Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
Xu Liu
Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
Yan Liu
Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
Lin Zhao
National Lab for Superconductivity, Institute of Physics, Chinese Academy of Sciences
Chinese Academy of Sci (CAS)
Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
Guodong Liu
Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
Jun Zhang
Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
M. Nakatake
Hiroshima Synchrotron Radiation Center, Hiroshima University, Hiroshima 739-8526, Japan
M. Arita
Hiroshima Synchrotron Radiation Center, Hiroshima University, Hiroshima 739-8526, Japan
K. Shimada
HiSOR, Hiroshima University
Hiroshima Synchrotron Radiation Center, Hiroshima University, Hiroshima 739-8526, Japan
H. Namatame
Hiroshima Synchrotron Radiation Center, Hiroshima University, Hiroshima 739-8526, Japan
M. Taniguchi
Hiroshima Synchrotron Radiation Center, Hiroshima University, Hiroshima 739-8526, Japan
Zuyan Xu
Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China
Chuangtian Chen
Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China
Xi Dai
Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences
Institute of Physics, Chinese Academy of Sciences
Zhong Fang
Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
Institute of Physics, Chinese Academy of Sciences
Xingjiang Zhou
Chinese Academy of Sci (CAS)
Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
