Dirac SemimetalsGraphene is an example of 2D Dirac semimetal. Another example of 2D Dirac Semimetal is the 2D surface states of 3D topological insulators while Fermi level is tuned to lie at the Dirac point inside the bulk gap of the semiconductor. In 3D there can be many different types of Dirac Semimetals: Nature Commun. 5, 4786 (2014) Science 347, 294 (2015) Phys. Rev. B 91, 241114(R) (2015) Phys. Rev. B 92, 075115 (2015) |
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Topology of the electronic structure of a crystal is manifested in its surface states. In topological insulators B |
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Symmetry-broken three-dimensional (3D) topological Dirac semimetal systems with strong spin-orbit coupling can host many exotic Hall-like phenomena and Weyl fermion quantum transport. Using high-resolution angle-resolved photoemission spectroscopy, we performed systematic electronic structure studies on Cd |
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Observation of Fermi Arc Surface States in a Topological Metal. Published in S.-Y. Xu, C. Liu, S. Kushwaha, et al., Science 347, 294 (2014). |
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Observation of a three-dimensional topological Dirac semimetal phase in high-mobility Cd _{3}As_{2}. Published in M. Neupane, S.-Y. Xu, R. Sankar, et al., Nature Commun. 5, 4786 (2014). |
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Observation of a bulk 3D Dirac multiplet, Lifshitz transition, and nestled spin states in Na _{3}Bi. Published in S.-Y. Xu, C. Liu, S. K. Kushwaha, et al., arXiv:1312.7624 (2013). |
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Lifshitz transition and van Hove singularity in a 3D Topological Dirac Semimetal. Published in S.-Y. Xu, C. Liu, I. Belopolski, et al., arXiv:1502.06917 (2015). |
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Bulk crystal growth and electronic characterization of the 3D Dirac Semimetal Na3Bi. Published in S. K. Kushwaha, J. W. Krizan, B. E. Feldman, et al., Phys. Rev. B 92, 075115 (2015). |
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Ultraquantum magnetoresistance in single-crystalline Ag2Se. Published in C. Zhang, H. Li, T.-R. Chang, et al., arXiv:1502.02324 (2015). |
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Surface Versus Bulk Dirac States Tuning in a Three-Dimensional Topological Dirac Semimetal. Published in M. Neupane, S.-Y. Xu, N. Alidoust, et al., Phys. Rev. B 91, 241114(R) (2015). |
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