Details

Autor(en) / Beteiligte

• Ohmura, Ayako
• Matsuzawa, Masako
• Ishikawa, Fumihiro
• Suzuki, Yusuke
• Komatsu, Masashi
• Osuga, Shumpei
• Nakano, Satoshi
• Nakayama, Atsuko
• Yamada, Yuh
• Kashiwagi, Takanari

Titel

Transport and structural properties of Cu^sub 0.25^Bi^sub 2^(Te ^sub x^ Se^sub 1− x^ )^sub 3^ (x = 0.01) under high pressure

Ist Teil von

• Japanese Journal of Applied Physics, 2017-05, Vol.56 (5), p.05FB04

Ort / Verlag

Tokyo: Japanese Journal of Applied Physics

Erscheinungsjahr

2017

Link zum Volltext

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Cu0.25Bi2(Te x Se1− x )3 is a material in which tellurium atoms (Te) partially occupy selenium (Se) sites in a crystal structure of the superconductor Cu0.25Bi2Se3. This study focuses on the composition of x = 0.01, Cu0.25Bi2(Te0.01Se0.99)3, and we performed electrical resistivity measurement and X-ray diffraction under high pressures. Cu0.25Bi2(Te0.01Se0.99)3 shows slight diamagnetism and a drop in resistivity at ambient pressure; this suggests possible superconductivity at the transition temperature of T c = 3.2 K, which is suppressed at P = 1 GPa. On further compression, a slight drop in resistivity is observed at temperatures of 4.3–5.4 K above 10 GPa. This drop is suppressed under magnetic fields, suggesting the occurrence of superconducting transition. The pressure-induced structural phase transition from a trigonal R3m phase to a sevenfold monoclinic C2/m phase occurs at 10.9 GPa. These results suggest that the superconducting transition above 10 GPa occurs in the high-pressure C2/m phase.