拓扑绝缘体Bi2Te3高压诱导结构演化
（The comprehensive phase evolution for Bi2Te3 topological compound as function of pressure）

S. J. Zhang, J. L. Zhang, X. H. Yu, J. Zhu, P. P. Kong, S. M. Feng, Q. Q. Liu, L. X. Yang, X. C. Wang, L. Z. Cao, W. G. Yang, L. Wang, H. K. Mao, Y. S. Zhao, H. Z. Liu, X. Dai, Z. Fang, S. C. Zhang and C. Q. Jin

J. Appl. Phys. 111, 112630 (2012)

Selected as a cover page of J. Appl. Phys.

　The recently discovered three-dimensional topological insulator Bi2Te3 is studied as function of pressure in terms of crystal structures, resistance, and Hall coefficient. The superconductivity is found in phase I (ambient phase) Bi2Te3 with Tc~3K, which is related to the topological features. The evolution of crystal structure with pressure is investigated by high pressure synchrotron radiation experiments that reveal structural transitions occurring at about 8GPa, 13 GPa, and 16GPa, respectively. Furthermore, the high pressure phases of Bi2Te3 are also superconducting but with much higher Tc~8K. The superconducting transitions are compared with those for Bi, Te elements. A global phase diagram of Bi2Te3 as function of pressure up to 30GPa is obtained.