Superconductivity in the topological insulator Bi2Te3 under hydrostatic pressure

作者：Matsubayashi K^*; Terai T; Zhou J S; Uwatoko Y

来源：Physical Review B, 2014, 90(12): 125126.

DOI：10.1103/PhysRevB.90.125126

We report the resistivity and ac susceptibility measurements of the topological insulator Bi2Te3 single crystals at pressures up to 11 GPa. Under highly hydrostatic pressure conditions generated in a multi-anvil high-pressure apparatus, a pressure-induced superconductivity only appears above a critical pressure PC similar to 7 GPa, coinciding with a structural transition from a rhombohedral to a monoclinic structure. The absence of superconductivity in the rhombohedral phase at pressures below PC, which is contrary to previous studies using the high-pressure apparatus with a solid pressure medium, suggests that the occurrence of superconductivity in the rhombohedral phase is sensitive to pressure conditions such as pressure inhomogeneity or uniaxial stress.

• 出版日期2014-9-16