TY - JOUR
T1 - Pressure-induced superconductivity in AgxBi2-xSe3
AU - He, Tong
AU - Yang, Xiaofan
AU - Terao, Takahiro
AU - Uchiyama, Takaki
AU - Ueno, Teppei
AU - Kobayashi, Kaya
AU - Akimitsu, Jun
AU - Miyazaki, Takafumi
AU - Nishioka, Takumi
AU - Kimura, Koji
AU - Hayashi, Kouichi
AU - Happo, Naohisa
AU - Yamaoka, Hitoshi
AU - Ishii, Hirofumi
AU - Liao, Yen Fa
AU - Ota, Hiromi
AU - Goto, Hidenori
AU - Kubozono, Yoshihiro
N1 - Funding Information:
This study was partly supported by Grants-in-Aid (Grants No. 26105004 and No. 17K05500) from MEXT, by JST ACT-C Grant No. JPMJCR12YW, Japan, and by the Program for Promoting the Enhancement of Research Universities. The XRD measurements at SPring-8 were carried out under Proposals No. 2017B4133 and No. 2017B4138, and the x-ray fluorescence holography at SPring-8 was measured under Proposals No. 2016A0124 and No. 2016B0124.
PY - 2018/3/7
Y1 - 2018/3/7
N2 - 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.
AB - 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.
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U2 - 10.1103/PhysRevB.97.104503
DO - 10.1103/PhysRevB.97.104503
M3 - Article
AN - SCOPUS:85043991168
VL - 97
JO - Physical Review B
JF - Physical Review B
SN - 2469-9950
IS - 10
M1 - 104503
ER -