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.
@article{arxiv.1502.03547,
title = {Bulk crystal growth and electronic characterization of the 3D Dirac Semimetal Na3Bi},
author = {Satya K. Kushwaha and Jason W. Krizan and Benjamin E. Feldman and Andras Gyenis and Mallika T. Randeria and Jun Xiong and Su-Yang Xu and Nasser Alidoust and Ilya Belopolski and Tian Liang and M. Zahid Hasan and N. P. Ong and A. Yazdani and R. J. Cava},
journal= {arXiv preprint arXiv:1502.03547},
year = {2015}
}
Comments
To be published in a special issue of APL Materials