Doping dependence of the electron-doped cuprate superconductors from the antiferromagnetic properties of the Hubbard model
Qingshan Yuan, Feng Yuan, C. S. Ting
DOI 10.1103/PhysRevB.72.054504 · Physical Review B
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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. It is found that, due to the inclusion of quantum fluctuations, the AF order decays with increasing doping much faster than obtained in the Hartree-Fock theory. Under an intermediate constant U the calculated doping evolution of the spectral intensity in the AF state has satisfactorily reproduced the experimental results, without need of a strongly doping-dependent U as argued earlier. This may reconcile a discrepancy in recent studies on photoemission and optical conductivity.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Nd2-xCexCuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
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