Coexistence of superconductivity and short-range double-stripe spin correlations in Te-vapor annealed FeTe${}_{1-x}$Se${}_x$ with $x\le 0.2$

Zhijun Xu, J. A. Schneeloch, Ming Yi +8

In as-grown bulk crystals of Fe${}_{1+y}$Te${}_{1-x}$Se${}_x$ with $x\lesssim 0.3$, excess Fe ($y>0$) is inevitable and correlates with a suppression of superconductivity. At the same t…