Nodeless superconductivity in K${}_x$Fe${}_{2-y}$Se${}_2$ single crystals revealed by low temperature specific heat

Bin Zeng, Bing Shen, Genfu Chen +4

Low temperature specific heat (SH) has been measured in K${}_x$Fe${}_{2-y}$Se${}_2$ single crystals with T${}_c$ = 32 K. The SH anomaly associated with the superconducting transition is mo…