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Enhancement of superconducting transition temperature by the additional second neighbor hopping t' in the t-J model | | Shiping Feng
; Tianxing Ma
; | | Date: |
5 Jun 2005 | | Subject: | Superconductivity; Strongly Correlated Electrons | cond-mat.supr-con cond-mat.str-el | | Abstract: | Within the kinetic energy driven superconducting mechanism, the effect of the additional second neighbor hopping t’ on the superconducting state of the t-J model is discussed. It is shown that t’ plays an important role in enhancing the superconducting transition temperature of the t-J model. It is also shown that the superconducting-state of cuprate superconductors is the conventional Bardeen-Cooper-Schrieffer like, so that the basic Bardeen-Cooper-Schrieffer formalism is still valid in quantitatively reproducing the doping dependence of the superconducting gap parameter and superconducting transition temperature, and electron spectral function at $(pi,0)$ point, although the pairing mechanism is driven by the kinetic energy by exchanging dressed spin excitations. | | Source: | arXiv, cond-mat/0506114 | | Services: | Forum | Review | PDF | Favorites | |
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