Observation of a bulk 3D Dirac multiplet, Lifshitz transition, and nestled spin states in Na3Bi

@inproceedings{Xu2013ObservationOA,
  title={Observation of a bulk 3D Dirac multiplet, Lifshitz transition, and nestled spin states in Na3Bi},
  author={Shiyou Xu and Chang Liu and Satya Kushwaha and Tay-Rong Chang and Jason W. Krizan and Raman Sankar and Craig M Polley and Johan Adell and Thiagarajan Balasubramanian and Kenji Miyamoto and Nasser Alidoust and Guang Bian and Mahesh R. Neupane and Ilya Belopolski and Horng-Tay Jeng and Chen Fu Huang and W. Tsai and Hsin Lin and Fremen Chihchen Chou and Tetsuji Okuda and Arun Bansil and Robert Joseph Cava and M Zahid Hasan},
  year={2013}
}
Symmetry or topology protected Dirac fermion states in two and three dimensions constitute novel quantum systems that exhibit exotic physical phenomena. However, none of the studied spin-orbit materials are suitable for realizing bulk multiplet Dirac states for the exploration of interacting Dirac physics. Here we present experimental evidence, for the first time, that the compound Na3Bi hosts a bulk spin-orbit Dirac multiplet and their interaction or overlap leads to a Lifshitz transition in… CONTINUE READING

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