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This content will become publicly available on October 20, 2014

Title: Superconductivity in strong spin orbital coupling compound Sb 2Se 3

Recently, A 2B 3 type strong spin orbital coupling compounds such as Bi 2Te 3, Bi 2Se 3 and Sb 2Te 3 were theoretically predicated to be topological insulators and demonstrated through experimental efforts. The counterpart compound Sb 2Se 3 on the other hand was found to be topological trivial, but theoretical studies indicated that the pressure might induce Sb 2Se 3 into a topological nontrivial state. We report on the discovery of superconductivity in Sb 2Se 3 single crystal induced via pressure. Our experiments indicated that Sb 2Se 3 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 (T C) 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 T C slop as the function of high pressure in conjunction with the evolutions of structural parameters at high pressures.
Authors:
 [1] ;  [2] ;  [1] ;  [1] ;  [1] ;  [1] ;  [1] ;  [1] ;  [1] ;  [1] ;  [3] ;  [1] ;  [4] ;  [5] ;  [3] ;  [6] ;  [4] ;  [7]
  1. Chinese Academy of Sciences (CAS), Beijing (China)
  2. Chinese Academy of Sciences (CAS), Beijing (China); Center for High Pressure Science and Technology Advanced Research (HPSTAR), Shanghai (China)
  3. Chinese Academy of Sciences (CAS), Beijing (China); Univ. of Nevada, Las Vegas, NV (United States)
  4. Center for High Pressure Science and Technology Advanced Research (HPSTAR), Shanghai (China); Carnegie Inst. of Washington, Argonne, IL (United States)
  5. Carnegie Inst. of Washington, Argonne, IL (United States)
  6. Uppsala Univ., Uppsala (Sweden)
  7. Chinese Academy of Sciences (CAS), Beijing (China); Collaborative Innovation Center of Quantum Matter, Beijing (China)
Publication Date:
OSTI Identifier:
1210799
Grant/Contract Number:
SC0001057; AC02-06CH11357; FG02-99ER45775; NA0001974
Type:
Accepted Manuscript
Journal Name:
Scientific Reports
Additional Journal Information:
Journal Volume: 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; Journal ID: ISSN 2045-2322
Publisher:
Nature Publishing Group
Research Org:
Univ. of Texas, Austin, TX (United States); Energy Frontier Research in Extreme Environments (EFree), Washington, DC (United States); Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS); Energy Frontier Research Centers (EFRC); Energy Frontier Research in Extreme Environments (EFree)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; catalysis (heterogeneous); solar (photovoltaic); phonons; thermoelectric; energy storage (including batteries and capacitors); hydrogen and fuel cells; superconductivity; charge transport; mesostructured materials; materials and chemistry by design; synthesis (novel materials); 36 MATERIALS SCIENCE