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arXiv · 1502.03547

Bulk crystal growth and electronic characterization of the 3D Dirac Semimetal Na3Bi

Satya K. Kushwaha·Jason W. Krizan·Benjamin E. Feldman·Andras Gyenis·Mallika T. Randeria·Jun Xiong·Su-Yang Xu·Nasser Alidoust·Ilya Belopolski·Tian Liang·M. Zahid Hasan·N. P. Ong·A. Yazdani·R. J. Cava
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Abstract

High quality hexagon plate-like Na3Bi crystals with large (001) plane surfaces were grown from a molten Na flux. The freshly cleaved crystals were analyzed by low temperature scanning tunneling microscopy (STM) and angle-resolved photoemission spectroscopy (ARPES), allowing for the characterization of the three-dimensional (3D) Dirac semimetal (TDS) behavior and the observation of the topological surface states. Landau levels (LL) were observed, and the energy-momentum relations exhibited a linear dispersion relationship, characteristic of the 3D TDS nature of Na3Bi. In transport measurements on Na3Bi crystals the linear magnetoresistance and Shubnikov-de Haas (SdH) quantum oscillations are observed for the first time.

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Satya K. Kushwaha, Jason W. Krizan, Benjamin E. Feldman, Andras Gyenis, Mallika T. Randeria, Jun Xiong, Su-Yang Xu, Nasser Alidoust, Ilya Belopolski, Tian Liang, M. Zahid Hasan, N. P. Ong, A. Yazdani, R. J. Cava. 2015-02-12. Bulk crystal growth and electronic characterization of the 3D Dirac Semimetal Na3Bi. https://doi.org/10.1063/1.4908158

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