TRIUMF

Exp. No.

M1420 — Approved

Title of Experiment

μSR studies of superconductivity in F-substituted LnOBiS2 (Ln=La, Ce, Pr, Nd, Yb) compounds

Spokesperson(s) for Group

Current Members of Group

Name Institution Status % of research time devoted to experiment
L. Shu Fudan University Associate Professor 25%
O.O. Bernal California State University, Los Angeles Professor 10%
Z. F. Ding Fudan University Student (Graduate)
K. Huang Fudan University PDF
D.E. MacLaughlin University of California, Riverside Professor Emeritus 10%
M.B. Maple University of California, San Diego Professor 5%
C. Tan Fudan University Student (Graduate)
D. Yazici University of California, San Diego PDF 5%
J. Zhang Fudan University Student (Graduate)

Abstract

The discovery of superconductivity in the BiS2-based compounds has attracted much interest. It is interesting to learn whether the similar exotic superconductivity observed in cuprates and Fe-pnictides also exist in BiS2-based superconductors. We have measured the muon spin relaxation rate in LnOBiS2 (Ln=La, Ce, Pr, Nd, Yb) compounds and found the evidence of multi-band superconductivity for Ln = La. However, temperature dependence of muon relaxation rate due to the nuclear dipole interaction at the normal state for Ln = Ce, Pr, Nd were also found. It will be useful to check whether the ZF muon relaxation rate also has the temperature dependence to give more information about Pr/Ce/Nd contribution.