  Sm(O,F)BiS2 superconducting single crystals with various nominal F contents
have been grown using KI-KCl flux. The solid solution limit of F at the O-site
in Sm(O,F)BiS2 single crystals was approximately less than 20 at%. F
concentrations of Sm(O,F)BiS2 single crystals were hardly controlled by nominal
F contents. It suggests the existence of intrinsic stable phase.
Superconductivity was shown at around 5 K. Superconducting transition
temperature with zero resistivity were increased with increasing nominal F
contents within less than 70 at% in O-site, despite similar F concentration and
c-axis lattice constants.
