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Massive Suppression of Proximity Pairing in Topological (Bi_{1-x}Sb_{x})_{2}Te_{3} Films on Niobium.
Hlevyack, Joseph A; Najafzadeh, Sahand; Lin, Meng-Kai; Hashimoto, Takahiro; Nagashima, Tsubaki; Tsuzuki, Akihiro; Fukushima, Akiko; Bareille, Cédric; Bai, Yang; Chen, Peng; Liu, Ro-Ya; Li, Yao; Flötotto, David; Avila, José; Eckstein, James N; Shin, Shik; Okazaki, Kozo; Chiang, T-C.
Afiliação
  • Hlevyack JA; Department of Physics, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, USA.
  • Najafzadeh S; Frederick Seitz Materials Research Laboratory, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, USA.
  • Lin MK; Institute for Solid State Physics, The University of Tokyo, Kashiwa, Chiba 277-8581, Japan.
  • Hashimoto T; Department of Physics, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, USA.
  • Nagashima T; Frederick Seitz Materials Research Laboratory, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, USA.
  • Tsuzuki A; Institute for Solid State Physics, The University of Tokyo, Kashiwa, Chiba 277-8581, Japan.
  • Fukushima A; Institute for Solid State Physics, The University of Tokyo, Kashiwa, Chiba 277-8581, Japan.
  • Bareille C; Institute for Solid State Physics, The University of Tokyo, Kashiwa, Chiba 277-8581, Japan.
  • Bai Y; Institute for Solid State Physics, The University of Tokyo, Kashiwa, Chiba 277-8581, Japan.
  • Chen P; Institute for Solid State Physics, The University of Tokyo, Kashiwa, Chiba 277-8581, Japan.
  • Liu RY; Department of Physics, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, USA.
  • Li Y; Frederick Seitz Materials Research Laboratory, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, USA.
  • Flötotto D; Department of Physics, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, USA.
  • Avila J; Frederick Seitz Materials Research Laboratory, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, USA.
  • Eckstein JN; Shanghai Center for Complex Physics, School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China.
  • Shin S; Key Laboratory of Artificial Structures and Quantum Control (Ministry of Education), Shenyang National Laboratory for Materials Science, School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China.
  • Okazaki K; Department of Physics, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, USA.
  • Chiang TC; Frederick Seitz Materials Research Laboratory, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, USA.
Phys Rev Lett ; 124(23): 236402, 2020 Jun 12.
Article em En | MEDLINE | ID: mdl-32603150
ABSTRACT
Interfacing bulk conducting topological Bi_{2}Se_{3} films with s-wave superconductors initiates strong superconducting order in the nontrivial surface states. However, bulk insulating topological (Bi_{1-x}Sb_{x})_{2}Te_{3} films on bulk Nb instead exhibit a giant attenuation of surface superconductivity, even for films only two layers thick. This massive suppression of proximity pairing is evidenced by ultrahigh-resolution band mappings and by contrasting quantified superconducting gaps with those of heavily n-doped topological Bi_{2}Se_{3}/Nb. The results underscore the limitations of using superconducting proximity effects to realize topological superconductivity in nearly intrinsic systems.
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Texto completo: 1 Base de dados: MEDLINE Idioma: En Ano de publicação: 2020 Tipo de documento: Article
Texto completo
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Texto completo: 1 Base de dados: MEDLINE Idioma: En Ano de publicação: 2020 Tipo de documento: Article