Enhancement of superconducting transition temperature by the additional second neighbor hopping t' in the t-J model

Shiping Feng; Tianxing Ma

doi:10.1016/j.physleta.2005.09.078

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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

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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 $(π,0)$ point, although the pairing mechanism is driven by the kinetic energy by exchanging dressed spin excitations.

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Shiping Feng, Tianxing Ma. 2005-09-20. Enhancement of superconducting transition temperature by the additional second neighbor hopping t' in the t-J model. https://doi.org/10.1016/j.physleta.2005.09.078

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