Doping Effects on the Spin-Density-Wave Background
The single-band Hubbard model has been proposed1 as a candidate to describe the high-temperature copper-oxide superconductors. There are two ways to approach such a strongly correlated electron system with the intrinsic 2D antiferromagnetic correlations. One is from the strong coupling, localized limit, where one could get a Mott insulator in the half-filled case with one electron per Cu site, described by the antiferromagnetic (AF) Heisenberg Hamiltonian. The alternative way is from the itinerant approach, where the insulating spin-density-wave (SDW) state is present at the half-filling. From the itinerant approach, the doping effects of holes on the SDW background will be discussed in the present paper.
KeywordsSpiral Structure Attractive Potential Dope Hole Magnetic Zone Intermediate Coupling Regime
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- 2.J.R. Schrieffer, X.-G. Wen and S.-C. Zhang, Phys. Rev. Lett. 60, 944 (1988).Google Scholar
- H.Y. Choi and E.J. Mele, Phys. Rev. B38, 4540(1988);Google Scholar
- W.P. Su and X.Y. Chen, Phys. Rev. B38, 8879 (1988).Google Scholar
- 4.Z.Y. Weng, T.K. Lee and C.S. Ting, Phys. Rev. B38, 6561(1988);Google Scholar
- G. Vignale and K.S. Singwi, Phys. Rev. B39, 2956(1989).Google Scholar
- 5.J.R. Schrieffer, X.G. Wen and S.C. Zhang, Phys. Rev. B39, 11663(1989).Google Scholar
- 7.Z.Y. Weng, C.S. Ting and T.K. Lee, to be published in Phys. Rev. B.Google Scholar
- C.L. Kane, P.A. Lee, T.K. Ng, B. Chakraborty and N. Read, preprintGoogle Scholar
- 9.Z.Y. Weng, C.S. Ting, preprint.Google Scholar
- T.R. Thurston ec al., Phys. Rev. B40, 4585 (1989);Google Scholar
- 11.A generalized Fork term like U ∑j<c+ j↑cj↓>+U ∑jc+ j↑cj↓<cj↑c+ j↓> should be also retained in H for a self-consistent mean-field approach as H involves spin- flip process. But we found such a term actually has a negligible contribution when ι ≪ ξ.Google Scholar