Large single crystal growth, transport property, and spectroscopic characterizations of three-dimensional Dirac semimetal Cd 3 As 2

R. Sankar, M. Neupane, S. Y. Xu, C. J. Butler, I. Zeljkovic, I. Panneer Muthuselvam, F. T. Huang, S. T. Guo, Sunil K. Karna, M. W. Chu, W. L. Lee, M. T. Lin, R. Jayavel, V. Madhavan, M. Z. Hasan, F. C. Chou

Research output: Contribution to journalArticle

19 Scopus citations

Abstract

The three dimensional (3D) Dirac semimetal is a new quantum state of matter that has attracted much attention recently in physics and material science. Here, we report on the growth of large plate-like single crystals of Cd3As2 in two major orientations by a self-selecting vapor growth (SSVG) method, and the optimum growth conditions have been experimentally determined. The crystalline imperfections and electrical properties of the crystals were examined with transmission electron microscopy (TEM), scanning tunneling microscopy (STM), and transport property measurements. This SSVG method makes it possible to control the as-grown crystal compositions with excess Cd or As leading to mobilities near 5-105 cm2V-1s-1. Zn-doping can effectively reduce the carrier density to reach the maximum residual resistivity ratio (RRR≡ρ300K/ρ5K) of 7.6. A vacuum-cleaved single crystal has been investigated using angle-resolved photoemission spectroscopy (ARPES) to reveal a single Dirac cone near the center of the surface Brillouin zone with a binding energy of approximately 200 meV.

Original languageEnglish (US)
Article number12966
JournalScientific reports
Volume5
DOIs
StatePublished - Aug 14 2015

All Science Journal Classification (ASJC) codes

  • General

Fingerprint Dive into the research topics of 'Large single crystal growth, transport property, and spectroscopic characterizations of three-dimensional Dirac semimetal Cd 3 As 2'. Together they form a unique fingerprint.

  • Cite this

    Sankar, R., Neupane, M., Xu, S. Y., Butler, C. J., Zeljkovic, I., Panneer Muthuselvam, I., Huang, F. T., Guo, S. T., Karna, S. K., Chu, M. W., Lee, W. L., Lin, M. T., Jayavel, R., Madhavan, V., Hasan, M. Z., & Chou, F. C. (2015). Large single crystal growth, transport property, and spectroscopic characterizations of three-dimensional Dirac semimetal Cd 3 As 2. Scientific reports, 5, [12966]. https://doi.org/10.1038/srep12966