Journal ArticleDOI
Temperature Dependence of the Optical Spectral Weight in the Cuprates: Role of Electron Correlations
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TLDR
Calculations based on the dynamical mean-field theory of the Hubbard model with the infrared spectral weight W(Omega,T) of La(2-x)SrxCuO4 and other cuprates show that most of the anomalies found in W( Omega, T) with respect to normal metals can be ascribed to strong correlation effects.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)SrxCuO4 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.read more
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Continuous-Time Solver for Quantum Impurity Models
Philipp Werner,Armin Comanac,Luca de' Medici,Luca de' Medici,Matthias Troyer,Andrew J. Millis +5 more
TL;DR: A new continuous-time solver for quantum impurity models such as those relevant to dynamical mean field theory, based on a stochastic sampling of a perturbation expansion in the impurity-bath hybridization parameter is presented, which allows very efficient simulations even at low temperatures and for strong interactions.
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TL;DR: In this article, the authors review studies of the electromagnetic response of various classes of correlated electron materials including transition metal oxides, organic and molecular conductors, intermetallic compounds with $d$- and $f$-electrons as well as magnetic semiconductors.
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Strongly correlated superconductivity : A plaquette dynamical mean-field theory study
Kristjan Haule,Gabriel Kotliar +1 more
TL;DR: In this paper, the authors used cluster dynamical mean field theory to study the simplest models of correlated electrons, the Hubbard model and the $t\text{\ensuremath{-}}J$ model.
Journal ArticleDOI
Optical conductivity and the correlation strength of high-temperature copper-oxide superconductors
TL;DR: In this paper, a comparison of new theoretical calculations and published optical conductivity measurements is presented, which indicates that the correlation strength in the cuprates is not as strong as previously believed, in particular that the materials are not properly regarded as Mott insulators.