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New mean-field theory of the tt't''J model applied to high-T(c) superconductors | Tiago C Ribeiro
; Xiao-Gang Wen
; | Date: |
29 Jul 2005 | Journal: | Phys Rev Lett, 95 (5), 057001 | Abstract: | We introduce a new mean-field approach to the tt’t’’J model that incorporates both electron-like quasiparticle and spinon excitations as suggested by some experiments and numerical studies. It leads to a mean-field phase diagram which is consistent with that of hole and electron doped cuprates. Moreover, it provides a framework to describe the observed evolution of the electron spectral function from the undoped insulator to the overdoped Fermi metal for both hole and electron doping. The theory also provides a new non-BCS mechanism leading to superconductivity. | Source: | PubMed, pmid16090908 | Services: | Forum | Review | Favorites |
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