Superconductivity in electron-doped \emph{Ln}OBiS$_2$ Compounds

ORAL

Abstract

We present observations of superconductivity in electron-doped \emph{Ln}OBiS$_2$ compounds (\emph{Ln} = La, Ce, Pr, Nd, Yb). Polycrystalline samples were synthesized by a two step solid-state reaction and characterized by x-ray diffraction. The parent compounds, \emph{Ln}OBiS$_2$, exhibit a non-metallic ground state. Superconductivity with $T_c$ in the range 1.9 K - 5.4 K was induced by electron doping these compounds via the substitution of F for O. Prior to the onset of superconductivity, the electrical resistivity of the electron-doped \emph{Ln}OBiS$_2$ compounds exhibit semiconductor like behavior, similar to the behavior observed in the parent compounds.

*Sample synthesis was funded by the US AFOSR-MURI Initiative Grant FA9550-09-1-0603 and sample characterization and physical properties measurements were supported by the US DOE Grant DE-FG02-04-ER46105.

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Authors

  • Duygu Yazici

    • University of California, San Diego

  • Kevin Huang

    • University of California, San Diego

  • Benjamin White

    • University of California, San Diego

  • Sooyoung Jang

    • University of California, San Diego

  • Alan Chang

    • University of California, San Diego

  • Aaron Friedman

    • University of California, San Diego

  • M.B. Maple

    • University of California, San Diego