Toward the Mott state with Magnetic Cluster Formation in Heavily Cu-Doped NaFe${}_{1-x}$Cu${}_x$As

Yizhou Xin, Ingrid Stolt, Jeongseop A. Lee +3

Recent neutron scattering measurements indicate that NaFe${}_{1-x}$Cu${}_x$As forms an antiferromagnetic stripe phase near $x\approx 0.5$ in a Mott insulating state. This copper conc…