Breakdown of three-dimensional Dirac semimetal state in pressurized C d3 A s2

Shan Zhang, Qi Wu, Leslie Schoop, Mazhar N. Ali, Youguo Shi, Ni Ni, Quinn Gibson, Shang Jiang, Vladimir Sidorov, Wei Yi, Jing Guo, Yazhou Zhou, Desheng Wu, Peiwen Gao, Dachun Gu, Chao Zhang, Sheng Jiang, Ke Yang, Aiguo Li, Yanchun LiXiaodong Li, Jing Liu, Xi Dai, Zhong Fang, Robert J. Cava, Liling Sun, Zhongxian Zhao

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Abstract

We report an observation of a pressure-induced breakdown of the three-dimensional Dirac semimetal (3D-DSM) state in Cd3As2, evidenced by a series of in situ high-pressure synchrotron x-ray diffraction and single-crystal transport measurements. We find that Cd3As2 undergoes a structural phase transition from a metallic tetragonal phase in space group I41/acd to a semiconducting monoclinic phase in space group P21/c at critical pressure 2.57 GPa; above this pressure, an activation energy gap appears, accompanied by distinct switches in Hall resistivity slope and electron mobility. These changes of crystal symmetry and corresponding transport properties manifest the breakdown of the 3DDSM state in pressurized Cd3As2.

Original languageEnglish (US)
Article number165133
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume91
Issue number16
DOIs
StatePublished - Apr 27 2015

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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    Zhang, S., Wu, Q., Schoop, L., Ali, M. N., Shi, Y., Ni, N., Gibson, Q., Jiang, S., Sidorov, V., Yi, W., Guo, J., Zhou, Y., Wu, D., Gao, P., Gu, D., Zhang, C., Jiang, S., Yang, K., Li, A., ... Zhao, Z. (2015). Breakdown of three-dimensional Dirac semimetal state in pressurized C d3 A s2. Physical Review B - Condensed Matter and Materials Physics, 91(16), [165133]. https://doi.org/10.1103/PhysRevB.91.165133