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Strong- and weak-coupling mechanisms for pseudogap in electron-doped cuprates | V.Hankevych
; B.Kyung
; A-M.Dare
; D.Senechal
; A.M.Tremblay
; | Date: |
3 Jul 2004 | Subject: | Strongly Correlated Electrons; Superconductivity | cond-mat.str-el cond-mat.supr-con | Abstract: | Using the two-particle self-consistent approach and cluster perturbation theory for the two-dimensional t-t’-t’’-U Hubbard model, we discuss weak- and strong-coupling mechanisms for the pseudogap observed in recent angle resolved photoemission spectroscopy on electron-doped cuprates. In the case of the strong-coupling mechanism, which is more relevant near half-filling, the pseudogap can be mainly driven by short range correlations near the Mott insulator. In the vicinity of optimal doping, where weak-coupling physics is more relevant, large antiferromagnetic correlation lengths, seen in neutron measurements, are the origin of the pseudogap. The t-J model is not applicable in the latter case. | Source: | arXiv, cond-mat/0407085 | Services: | Forum | Review | PDF | Favorites |
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