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Gate dependence of upper critical field in superconducting (110) LaAlO3/SrTiO3 interface.
Shen, S C; Chen, B B; Xue, H X; Cao, G; Li, C J; Wang, X X; Hong, Y P; Guo, G P; Dou, R F; Xiong, C M; He, L; Nie, J C.
Afiliação
  • Shen SC; Department of Physics, Beijing Normal University, Beijing 100875, China.
  • Chen BB; Key Laboratory of Quantum Information, CAS, University of Science and Technology of China, Hefei, Anhui 230026, China.
  • Xue HX; Department of Physics, Beijing Normal University, Beijing 100875, China.
  • Cao G; Key Laboratory of Quantum Information, CAS, University of Science and Technology of China, Hefei, Anhui 230026, China.
  • Li CJ; Department of Physics, Beijing Normal University, Beijing 100875, China.
  • Wang XX; Department of Physics, Beijing Normal University, Beijing 100875, China.
  • Hong YP; Department of Physics, Beijing Normal University, Beijing 100875, China.
  • Guo GP; Key Laboratory of Quantum Information, CAS, University of Science and Technology of China, Hefei, Anhui 230026, China.
  • Dou RF; Department of Physics, Beijing Normal University, Beijing 100875, China.
  • Xiong CM; Department of Physics, Beijing Normal University, Beijing 100875, China.
  • He L; Department of Physics, Beijing Normal University, Beijing 100875, China.
  • Nie JC; Department of Physics, Beijing Normal University, Beijing 100875, China.
Sci Rep ; 6: 28379, 2016 07 05.
Article em En | MEDLINE | ID: mdl-27378271
The fundamental parameters of the superconducting state such as coherence length and pairing strength are essential for understanding the nature of superconductivity. These parameters can be estimated by measuring critical parameters such as upper critical field, Hc2. In this work, Hc2 of a superconducting (110) LaAlO3/SrTiO3 interface is determined through magnetoresistive measurements as a function of the gate voltage, VG. When VG increases, the critical temperature has a dome-like shape, while Hc2 monotonically decreases. This relationship of independence between the variation of Tc and of Hc2 suggests that the Cooper pairing potential is stronger in the underdoped region and the coherence length increases with the increase of VG. The result is as for high temperature superconducting cuprates and it is different than for conventional low temperature superconductors.

Texto completo: 1 Base de dados: MEDLINE Idioma: En Ano de publicação: 2016 Tipo de documento: Article

Texto completo: 1 Base de dados: MEDLINE Idioma: En Ano de publicação: 2016 Tipo de documento: Article