Spin dynamics near a putative antiferromagnetic quantum critical point in Cu substituted BaFe${}_2$As${}_2$ and its relation to high-temperature superconductivity

M. G. Kim, M. Wang, G. S. Tucker +15

We present the results of elastic and inelastic neutron scattering measurements on non-superconducting Ba(Fe${}_{0.957}$Cu${}_{0.043}$)${}_2$As${}_2$, a composition close to a quan…