Superconductivity in the topological insulator Bi2Te3 under hydrostatic pressure
K. Matsubayashi, T. Terai, J. S. Zhou, Y. Uwatoko
DOI 10.1103/PhysRevB.90.125126 · Physical Review B
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Abstract
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∼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.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Bi2Te3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 2.7 | 8 GPa | zero_resistance |
| Bi2Te3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 2.7 | 8 GPa | onset |
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