Long-Range Coulomb Effect on the Antiferromagnetism in Electron-doped Cuprates

Details Long-Range Coulomb Effect on the Antiferromagnetism in Electron-doped Cuprates Long-Range Coulomb Effect on the Antiferromagnetism in Electron-doped Cuprates

2005-07-20

arxiv.org/abs/cond-mat/0507465v1

PRB 73, 052501 (2006).

Physics

Condensed Matter

Superconductivity

4 pages, 4 figures

Scientific paper

10.1103/PhysRevB.73.052501

Using mean-field theory, we illustrate the long-range Coulomb effect on the antiferromagnetism in the electron-doped cuprates. Because of the Coulomb exchange effect, the magnitude of the effective next nearest neighbor hopping parameter increases appreciably with increasing the electron doping concentration, raising the frustration to the antiferromagnetic ordering. The Fermi surface evolution in the electron-doped cuprate Nd$_{2-x}$Ce$_x$CuO$_4$ and the doping dependence of the onset temperature of the antiferromagnetic pseudogap can be reasonably explained by the present consideration.

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