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Temperature dependence of the optical spectral weight in the cuprates: Role of electron correlations

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arxiv cond-mat/0502528 v2 pith:ZRZGWZZR submitted 2005-02-22 cond-mat.str-el cond-mat.supr-con

A. Toschi , M. Capone , M. Ortolani , P. Calvani , S. Lupi , C. Castellani This is my paper · ORCID
classification cond-mat.str-elcond-mat.supr-con
keywords omegacupratesdependencespectralweightanomaliesascribedcalculations
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abstract

We compare calculations based on the Dynamical Mean-Field Theory of the Hubbard model with the infrared spectral weight $W(\Omega,T)$ of La$_{2-x}$Sr$_x$CuO$_4$ and other cuprates. Without using fitting parameters we show that most of the anomalies found in $W(\Omega,T)$ with respect to normal metals, including the existence of two different energy scales for the doping- and the $T$-dependence of $W(\Omega,T)$, can be ascribed to strong correlation effects.

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