Simulations for the Extended Hubbard Model Utilizing Nonextensive Statistical Mechanics

Details Simulations for the Extended Hubbard Model Utilizing Nonextensive Statistical Mechanics Simulations for the Extended Hubbard Model Utilizing Nonextensive Statistical Mechanics

2009-12-29

arxiv.org/abs/0912.5386v2

Physics

Condensed Matter

Statistical Mechanics

6 figures

Scientific paper

We introduce an investigation about M dimers through half-filled two-site Hubbard model, that is, with two electrons. We utilize the third version of nonextensive statistical mechanics as tool for cal-culating thermodynamical and magnetic parameters as entropy, internal energy and specific heat. By making computer simulations, we vary the q entropic index values between 1 and 2: q=1.1, 1.3, 1.5, 1.7 and 2.0. These values are interesting to study magnetic small systems. We find that the addition of intersite interaction term causes a shifting of all simulated curves in relation to simple Hubbard model.

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