Mean-field calculations of the properties of the dilute t-J model for high-temperature superconductivity

J. W. Halley; X-F Wang; S. Davis

doi:10.1103/PhysRevB.46.6560

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Mean-field calculations of the properties of the dilute t-J model for high-temperature superconductivity

J. W. Halley, X-F Wang, S. Davis

DOI 10.1103/PhysRevB.46.6560 · Physical Review B

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Abstract

We describe mean-field calculations of the properties of the dilute t-J model for high-Tc superconductors. We first discuss a physical motivation for the model in terms of the effects of oxygen vacancies and the appropriate parametrization for a qualitative description of high-Tc superconductors. We briefly review our mean-field numerical methods. We present results on the density of states, local carrier density, the transition temperature as a function of carrier concentration, oxygen-vacancy concentration, and elastic-scattering impurity concentration, as well as the dc conductivity. These are compared with experiment on high-Tc materials. We conclude that the model is a promising framework for understanding high-Tc materials microscopically.