Fluctuation-exchange study of antiferromagnetism in disordered electron-doped cuprate superconductors.
On the basis of the Hubbard model, we extend the fluctuation-exchange (FLEX) approach to investigating the properties of the antiferromagnetic (AF) phase in electron-doped cuprate superconductors. Furthermore, by incorporating the effect of scatterings due to the disordered dopant atoms into the FLEX formalism, our numerical results show that the antiferromagnetic transition temperature, the onset temperature of pseudogap due to spin fluctuations, the spectral density of the single particle near the Fermi surface, and the staggered magnetization in the AF phase as a function of electron doping can consistently account for the experimental measurements.
Yan
Xin-Zhong
XZ
Texas Center for Superconductivity, University of Houston, Houston, Texas 77204, USA.
Ting
C S
CS