Enhancement of Tc in BiS2-based superconductors NdO0.7F0.3BiS2 by substitution of Pb for Bi

S. Demura, Y. Fujisawa, S. Otsuki, R. Ishio, Y. Takano, H. Sakata

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)

Abstract

We succeed in enhancement of a superconducting transition temperature (Tc) for NdO0.7F0.3BiS2 single crystal by partial substitution of Pb for Bi. The Tc increases with increasing Pb concentration until 6%. The maximum Tczero is 5.6 K, which is the highest value among BiS2-based based superconductors synthesized under an ambient pressure. Pb substitution for Bi induces lattice shrinkage along the c-axis. These results reflect that superconductivity in this system is responsive to the lattice strain.

Original languageEnglish
Pages (from-to)40-44
Number of pages5
JournalSolid State Communications
Volume223
DOIs
Publication statusPublished - 1 Dec 2015
Externally publishedYes

Keywords

  • A. BiS-superconductor
  • A. Superconductivity
  • E. Scanning tunneling spectroscopy (STM)
  • E. Transport properties

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