Bulk Superconductivity in Fe${}_{1+y}$Te${}_{1-x}$Se${}_x$ Induced by Annealing in Se and S Vapor

Yue Sun, Yuji Tsuchiya, Tatsuhiro Yamada +4

We reported that bulk superconductivity in Fe${}_{1+y}$Te${}_{1-x}$Se${}_x$ can be induced by annealing in Se and S vapor. The well-annealed samples show a large critical current densi…