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arXiv · cond-mat/9208002

Transport Properties of the Infinite Dimensional Hubbard Model

Th. Pruschke·D. L. Cox·M. Jarrell
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Abstract

Results for the optical conductivity and resistivity of the Hubbard model in infinite spatial dimensions are presented. At half filling we observe a gradual crossover from a normal Fermi-liquid with a Drude peak at $ω=0$ in the optical conductivity to an insulator as a function of $U$ for temperatures above the antiferromagnetic phase transition. When doped, the ``insulator'' becomes a Fermi-liquid with a corresponding temperature dependence of the optical conductivity and resistivity. We find a $T^2$-coefficient in the low temperature resistivity which suggests that the carriers in the system acquire a considerable mass-enhancement due to the strong local correlations. At high temperatures, a crossover into a semi-metallic regime takes place.

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Th. Pruschke, D. L. Cox, M. Jarrell. 1992-08-05. Transport Properties of the Infinite Dimensional Hubbard Model. https://doi.org/10.1209/0295-5075%2F21%2F5%2F015

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