| 压力诱导酌拓扑绝缘体化合物Bi2Te3常压相的超导性 |
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| 引用本文： | 张俊良,张思佳,翁红明,于晓辉,张巍,杨留响,刘清青,冯少敏,望贤成,禹日成,曹烈兆,张首晟,戴希,方忠,靳常青. 压力诱导酌拓扑绝缘体化合物Bi2Te3常压相的超导性[J]. 低温物理学报, 2012, 0(1): 1-7 |
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| 作者姓名： | 张俊良 张思佳 翁红明 于晓辉 张巍 杨留响 刘清青 冯少敏 望贤成 禹日成 曹烈兆 张首晟 戴希 方忠 靳常青 |
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| 作者单位： | 中国科学技术大学物理系;中国科学院物理研究所;Department of Physics McCullough Building Stanford University Stanford;清华大学高等研究中心 |
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| 基金项目： | 国家自然科学基金(批准号:10820101049);科技部国家重点基础研究发展计划(批准号:2007CB925000和2010CB923000)资助的课题~~ |
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| 摘 要： | 通过高压电阻测量，发现了拓扑绝缘体化合物BizTe3压力诱导的超导性，在3-6GPa的压力范围内，超导临界温度L约为3K．高压下原位同步辐射的结果证明这个超导相来源于常压相结构．通过霍尔效应的测量，发现超导的Bi2Te3样品的载流子为P型．对高压同步辐射结果Reitveld精修得到的晶格参数和原子位置，并以此进行第一性...
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| 关 键 词： | 拓扑绝缘体 高压 超导性 Bi2Te3 |
RESSURE-INDUCED SUPERCONDUCTIVITY IN AMBIENT PHASE OF TOPOLOGICAL COMPOUND Bi2Te3 |
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| ZHANG Jun-liang,ZHANG Si-jia,WENG Hong-ming,YU Xiao-hui,ZHANG Wei,YANG Liu-xiang,LIU Qing-qing,FENG Shao-min,WANG Xian-cheng,YU Ri-cheng,CAO Lie-zhao,ZHANG Shou-cheng,DAI Xi,FANG Zhong,JIN Chang-qing. RESSURE-INDUCED SUPERCONDUCTIVITY IN AMBIENT PHASE OF TOPOLOGICAL COMPOUND Bi2Te3[J]. Chinese Journal of Low Temperature Physics, 2012, 0(1): 1-7 |
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| Authors: | ZHANG Jun-liang ZHANG Si-jia WENG Hong-ming YU Xiao-hui ZHANG Wei YANG Liu-xiang LIU Qing-qing FENG Shao-min WANG Xian-cheng YU Ri-cheng CAO Lie-zhao ZHANG Shou-cheng DAI Xi FANG Zhong JIN Chang-qing |
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| Affiliation: | 1Department of Physics,University of Science and Technology of China,Hefei,230026; 2Institute of Physics,Chinese Academy of Sciences,Beijing,100190; 23 Department ofPhysics,McCullough Building,Stanford University,Stanford,CA 94305-4045; 4Center for Advanced Study,Tsinghua University,Beijing 100084 |
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| Abstract: | pressure-induced superconductivity was observed in a topological compound Bi2Te3 with Tc of ~3K between 3 to 6 GPa via in-situ high-pressure resistance measurements.The combined in-situ high-pressure structure investigations with synchrotron radiation indicated that the superconductivity occurred with ambient structure before a structure phase transition occurred.p-type carrier was detected in superconducting Bi2Te3 single crystal by the Hall effects measurements.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 Bi2Te3 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. |
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| Keywords: | Topological insulator high pressure superconductivity Bi2Te3 |
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