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

Authors :: Satya K. Kushwaha
Jason W. Krizan
Benjamin E. Feldman
András 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
Source :: APL Materials, Vol 3, Iss 4, Pp 041504-041504-9 (2015)
Publication Year :: 2015
Publisher :: AIP Publishing LLC, 2015.
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 and angle-resolved photoemission spectroscopy, allowing for the characterization of the three-dimensional (3D) Dirac semimetal (TDS) behavior and the observation of the topological surface states. Landau levels 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 quantum oscillations are observed for the first time.

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