Pressure-induced superconductivity in AgxBi2-xSe3

Tong He, Xiaofan Yang, Takahiro Terao, Takaki Uchiyama, Teppei Ueno, Kaya Kobayashi, Jun Akimitsu, Takafumi Miyazaki, Takumi Nishioka, Koji Kimura, Kouichi Hayashi, Naohisa Happo, Hitoshi Yamaoka, Hirofumi Ishii, Yen Fa Liao, Hiromi Ota, Hidenori Goto, Yoshihiro Kubozono

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15 Citations (Scopus)

Abstract

We investigated the pressure dependence of electric transport and crystal structure of Ag-doped Bi2Se3. In the sample prepared by Ag doping of Bi2Se3, the Bi atom was partially replaced by Ag, i.e., Ag0.05Bi1.95Se3. X-ray diffraction patterns of Ag0.05Bi1.95Se3 measured at 0-30 GPa showed three different structural phases, with rhombohedral, monoclinic, and tetragonal structures forming in turn as pressure increased, and structural phase transitions at 8.8 and 24 GPa. Ag0.05Bi1.95Se3 showed no superconductivity down to 2.0 K at 0 GPa, but under pressure, superconductivity suddenly appeared at 11 GPa. The magnetic field (H) dependence of the superconducting transition temperature Tc was measured at 11 and 20.5 GPa, in order to investigate whether the pressure-induced superconducting phase is explained by either p-wave polar model or s-wave model.

Original languageEnglish
Article number104503
JournalPhysical Review B
Volume97
Issue number10
DOIs
Publication statusPublished - Mar 7 2018

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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    He, T., Yang, X., Terao, T., Uchiyama, T., Ueno, T., Kobayashi, K., Akimitsu, J., Miyazaki, T., Nishioka, T., Kimura, K., Hayashi, K., Happo, N., Yamaoka, H., Ishii, H., Liao, Y. F., Ota, H., Goto, H., & Kubozono, Y. (2018). Pressure-induced superconductivity in AgxBi2-xSe3. Physical Review B, 97(10), [104503]. https://doi.org/10.1103/PhysRevB.97.104503