Observation of Fermi arc surface states in a topological metal

@article{Xu2015ObservationOF,
  title={Observation of Fermi arc surface states in a topological metal},
  author={Su-Yang Xu and Chang Liu and Sanjeev Kumar Singh Kushwaha and Ruthiramurthy Sankar and Jason W. Krizan and Ilya Belopolski and Madhab Neupane and Guang Sheng Bian and Nasser Alidoust and Tian-Sheuan Chang and H. -T. Jeng and Cheng-Yi Huang and Wei-Feng Tsai and Hsin Lin and Pavel P Shibayev and Fang-Cheng Chou and Robert Joseph Cava and Md. Zayedul Hasan},
  journal={Science},
  year={2015},
  volume={347},
  pages={294-298}
}
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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