Superconductivity in strong spin orbital coupling compound Sb2Se3
- Chinese Academy of Sciences (CAS), Beijing (China)
- Chinese Academy of Sciences (CAS), Beijing (China); Center for High Pressure Science and Technology Advanced Research (HPSTAR), Shanghai (China)
- Chinese Academy of Sciences (CAS), Beijing (China); Univ. of Nevada, Las Vegas, NV (United States)
- Center for High Pressure Science and Technology Advanced Research (HPSTAR), Shanghai (China); Carnegie Inst. of Washington, Argonne, IL (United States)
- Carnegie Inst. of Washington, Argonne, IL (United States)
- Uppsala Univ., Uppsala (Sweden)
- Chinese Academy of Sciences (CAS), Beijing (China); Collaborative Innovation Center of Quantum Matter, Beijing (China)
Recently, A2B3 type strong spin orbital coupling compounds such as Bi2Te3, Bi2Se3 and Sb2Te3 were theoretically predicated to be topological insulators and demonstrated through experimental efforts. The counterpart compound Sb2Se3 on the other hand was found to be topological trivial, but theoretical studies indicated that the pressure might induce Sb2Se3 into a topological nontrivial state. We report on the discovery of superconductivity in Sb2Se3 single crystal induced via pressure. Our experiments indicated that Sb2Se3 became superconductive at high pressures above 10 GPa proceeded by a pressure induced insulator to metal like transition at ~3 GPa which should be related to the topological quantum transition. The superconducting transition temperature (TC) increased to around 8.0 K with pressure up to 40 GPa while it keeps ambient structure. As a result, high pressure Raman revealed that new modes appeared around 10 GPa and 20 GPa, respectively, which correspond to occurrence of superconductivity and to the change of TC slop as the function of high pressure in conjunction with the evolutions of structural parameters at high pressures.
- Research Organization:
- Univ. of Texas, Austin, TX (United States); Energy Frontier Research in Extreme Environments (EFree), Washington, DC (United States); Argonne National Laboratory (ANL), Argonne, IL (United States). Advanced Photon Source (APS); Energy Frontier Research Centers (EFRC) (United States). Energy Frontier Research in Extreme Environments (EFree)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- Grant/Contract Number:
- SC0001057; AC02-06CH11357; FG02-99ER45775; NA0001974
- OSTI ID:
- 1210799
- Alternate ID(s):
- OSTI ID: 1212917; OSTI ID: 1221884
- Journal Information:
- Scientific Reports, Vol. 4; Related Information: EFRC partners with Carnegie Institution of Washington (lead); California Institute of Technology; Colorado School of Mines; Cornell University; Lehigh University; Pennsylvania State University; ISSN 2045-2322
- Publisher:
- Nature Publishing GroupCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
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36 MATERIALS SCIENCE