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Doping dependence of the electron-doped cuprate superconductors from the antiferromagnetic properties of the Hubbard model

Qingshan Yuan·Feng Yuan·C. S. Ting
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Abstract

Within the Kotliar-Ruckenstein slave-boson approach, we have studied the antiferromagnetic (AF) properties for the $t$-$t'$-$t''$-$U$ model applied to electron-doped cuprate superconductors. Due to inclusion of spin fluctuations the AF order decreases with doping much faster than obtained in the Hartree-Fock theory. Under an intermediate {\it constant} $U$ the calculated doping evolution of the spectral intensity has satisfactorily reproduced the experimental results, without need of a strongly doping-dependent $U$ as argued earlier. This may reconcile a discrepancy suggested in recent studies on photoemission and optical conductivity.

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Qingshan Yuan, Feng Yuan, C. S. Ting. 2005-07-25. Doping dependence of the electron-doped cuprate superconductors from the antiferromagnetic properties of the Hubbard model. https://doi.org/10.1103/physrevb.72.054504

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