Effect of proton irradiation on the normal-state low-energy excitations of Ba(Fe1−xRhx)2As2 superconductors
Effect of proton irradiation on the normal-state low-energy excitations of Ba(Fe1−xRhx)2As2 superconductors
We present a $^{75}\mathrm{As}$ nuclear magnetic resonance (NMR) and resistivity study of the effect of 5.5 MeV proton irradiation on the optimal electron doped $(x=0.068)$ and overdoped $(x=0.107)$ $\mathrm{Ba}{({\mathrm{Fe}}_{1\ensuremath{-}x}{\mathrm{Rh}}_{x})}_{2}{\mathrm{As}}_{2}$ iron based superconductors. While the proton induced defects only mildly suppress the critical temperature and increase residual resistivity in both compositions, …