We synthesized new REO0.5F0.5BiS2 (RE: rare earth) superconductors with the high-entropy-alloy-type (HEA-type) REO blocking layers. According to the RE concentration and the RE ionic radius, the lattice constant of a systematically changed in the HEA-type samples. A sharp superconducting transition was observed in the resistivity measurements for all the HEA-type samples, and the transition temperature of the HEA-type samples was higher than that of typical REO0.5F0.5BiS2. The sharp superconducting transition and the enhanced superconducting properties of the HEA-type samples may indicate the effectiveness of the HEA states of the REO blocking layers in the REO0.5F0.5BiS2 system.
@article{arxiv.1804.02880,
title = {Superconductivity in REO0.5F0.5BiS2 with high-entropy-alloy-type blocking layers},
author = {Ryota Sogabe and Yosuke Goto and Yoshikazu Mizuguchi},
journal= {arXiv preprint arXiv:1804.02880},
year = {2018}
}