Observation of Fermi arc surface states in a topological metal

  title={Observation of Fermi arc surface states in a topological metal},
  author={S. Xu and Chang Liu and Satya Kushwaha and Raman Sankar and Jason W. Krizan and Ilya Belopolski and Madhab Neupane and Guang Bian and Nasser Alidoust and Tay-Rong Chang and Horng-Tay Jeng and Cheng-Yi Huang and Wei-Feng Tsai and Hsin Lin and Pavel P Shibayev and F. C. Chou and Robert Joseph Cava and Md. Hasan},
The topology of the electronic structure of a crystal is manifested in its surface states. Recently, a distinct topological state has been proposed in metals or semimetals whose spin-orbit band structure features three-dimensional Dirac quasiparticles. We used angle-resolved photoemission spectroscopy to experimentally observe a pair of spin-polarized Fermi arc surface states on the surface of the Dirac semimetal Na3Bi at its native chemical potential. Our systematic results collectively… CONTINUE READING
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