Robust nodal superconductivity induced by isovalent doping in Ba(Fe${}_{1-x}$Ru${}_x$)${}_2$As${}_2$ and BaFe${}_2$(As${}_{1-x}$P${}_x$)${}_2$

X. Qiu, S. Y. Zhou, H. Zhang +9

We present the ultra-low-temperature heat transport study of iron-based superconductors Ba(Fe${}_{1-x}$Ru${}_x$)${}_2$As${}_2$ and BaFe${}_2$(As${}_{1-x}$P${}_x$)${}_2$. For optimally doped Ba(Fe$…