In 2012, we discovered superconductivity in Bi4O4S3 and LaO1− x F x BiS2, whose crystal
structures are composed of alternate stacks of a BiS2-type conduction layer and a blocking …

With the addition of oxygen into the chain-like bismuth sulfide of Bi2S3, there are two
interesting functional compounds of Bi2O2S (photoelectric) and Bi4O4S3 (superconducting) …

Abstract BiCh2-based compounds (Ch: S, Se) are a new series of layered superconductors
and the mechanisms for the emergence of superconductivity in these materials have not yet …

We report a strategy to induce superconductivity in the BiS 2-based compound LaOBiS 2.
Instead of substituting F for O, we increase the charge-carrier density (electron dope) via …

Superconductivity (SC) and charge-density wave (CDW) are two contrasting yet relevant
collective electronic states, which have received sustained interest for decades. Here, we …

We synthesized new REO 0.5 F 0.5 BiS 2 (RE: rare earth) superconductors with high-
entropy-alloy-type (HEA-type) REO blocking layers. The lattice constant a systematically …

In 2012, a new layered superconductor where BiS 2 layer is the superconducting layer was
discovered. So far, seven types of BiS 2-based superconductors and two related …

The layered Bi-chalcogenide compounds have been drawing much attention as a new
layered superconductor family since 2012. Due to the rich variation of crystal structure and …

Electrical resistivity measurements as a function of temperature between 1 and 300 K were
performed at various pressures up to 3 GPa on the superconducting layered compounds Ln …

We have synthesized high-entropy-alloy-type (HEA-type) RE123 superconductors Y 0.28 Nd
0.16 Sm 0.18 Eu 0.18 Gd 0.20 Ba 2 Cu 3 O 7-δ and Y 0.18 La 0.24 Nd 0.14 Sm 0.14 Eu 0.15 …