No well-defined remnant Fermi surface in Sr2CuO2Cl2

S. Haffner, D. M. Brammeier, C. G. Olson +2

In angle-resolved photoelectron spectra of the antiferromagnetic insulators Ca2CuO2Cl2 and Sr2CuO2Cl2 a sharp drop of the spectral intensity of the lowest-lying band is observed al…