Details

Autor(en) / Beteiligte

• Zhang, J L
• Zhang, S J
• Weng, H M
• Zhang, W
• Yang, L X
• Liu, Q Q
• Feng, S M
• Wang, X C
• Yu, R C
• Cao, L Z
• Wang, L
• Yang, W G
• Liu, H Z
• Zhao, W Y
• Zhang, S C
• Dai, X
• Fang, Z
• Jin, C Q

Titel

Pressure-induced superconductivity in topological parent compound Bi2Te3

Ist Teil von

• Proceedings of the National Academy of Sciences - PNAS, 2011-01, Vol.108 (1), p.24-28

Ort / Verlag

United States: National Acad Sciences

Erscheinungsjahr

2011

Quelle

MEDLINE

Beschreibungen/Notizen

• We report a successful observation of pressure-induced superconductivity in a topological compound Bi 2 Te 3 with T c of ∼3 K between 3 to 6 GPa. The combined high-pressure structure investigations with synchrotron radiation indicated that the superconductivity occurred at the ambient phase without crystal structure phase transition. The Hall effects measurements indicated the hole-type carrier in the pressure-induced superconducting Bi 2 Te 3 single crystal. Consequently, the first-principles calculations based on the structural data obtained by the Rietveld refinement of X-ray diffraction patterns at high pressure showed that the electronic structure under pressure remained topologically nontrivial. The results suggested that topological superconductivity can be realized in Bi 2 Te 3 due to the proximity effect between superconducting bulk states and Dirac-type surface states. We also discuss the possibility that the bulk state could be a topological superconductor.