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Statics and dynamics of charge fluctuations in the t-J model

Roland Zeyher·Miodrag L. Kulic
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Abstract

The equation for the charge vertex $γ$ of the $t-J$ model is derived and solved in leading order of an 1/N expansion, working directly in terms of Hubbard operators. Various quantities which depend crucially on $γ$ are then calculated, such as the life time and the transport life time of electrons due to a charge coupling to other degrees of freedom and the charge-charge correlation function. Our results show that the static screening of charges and the dynamics of charge fluctuations depend only weakly on $J$ and are mainly determined by the constraint of having no double occupancies of sites.

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Roland Zeyher, Miodrag L. Kulic. 1996-08-12. Statics and dynamics of charge fluctuations in the t-J model. https://doi.org/10.1103/physrevb.54.8985

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