75As NMR study of single crystals of the heavily overdoped pnictide superconductors Ba{1-x}KxFe2As2 (x = 0.7 and 1)

S. W. Zhang, L. Ma, Y. D. Hou +6

We performed ${}^{75}$As NMR studies on two overdoped high-quality Ba${}_{1-x}$K${}_x$Fe${}_2$As${}_2$ (x=0.7 and 1.0) single crystals. In the normal states, we found a dramatic increase o…