Clastin I. Sathish, Kazunari Yamaura
Bismuth oxy-sulfide Bi4O4S3, which was recently claimed to be an exotic superconductor (Tc = 4.5 K), was studied by magnetic susceptibility and electrical resistivity measurements. Single-phase Bi4O4S3 was successfully prepared by a high-pressure method, and its lattice parameters and normal-state resistivity, as well as the density of states at the Fermi level, were found to be comparable with those determined earlier. However, bulk superconductivity was absent (>2 K) in the compound, which contradicted the observations in ongoing experiments. The slight difference between the high-pressure phase and superconducting phase of Bi4O4S3 is expected to be a possible reason for this discrepancy. The results of the present study imply that if the high-pressure phase is not identical to the superconducting phase, the former can be a possible host material for the exotic layered Bi4O4S3 superconductor.
View original:
http://arxiv.org/abs/1208.2818
No comments:
Post a Comment