Optical sum rule anomalies in the cuprates: Interplay between strong correlation and electronic band structure

2007/08/27 by A. Toschi, Massimo Capone, M. Capone · 1 citation
Physics and Astronomy · #Advanced Condensed Matter Physics #Physics of Superconductivity and Magnetism #Quantum and electron transport phenomena #cond-mat.str-el

paper · pdf · doi:10.1103/physrevb.77.014518

published as Phys. Rev. B 77, 014518 (2008) · 8 pages, 6 figures

arxiv created 2007/08/27 · openalex publication_date 2008/01/24 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28

Abstract

We theoretically analyze some of the anomalies of the optical sum rules in the high-temperature superconductors. In particular, we address the particularly strong dependence on temperature of the sum rule in the normal state. Both electron-electron correlations and the presence of a Van Hove singularity have been shown to enhance such a dependence. Here, we consider both effects simultaneously by means of dynamical mean-field theory for a two-dimensional Hubbard model with realistic parameters for different cuprates, and we find that the two effects are not cooperative, as they appear to compete with one another in the region of parameters relevant for the experiments.

Citations

• Sum rules and energy scales in the high-temperature superconductorYBa2Cu3O6+x
• Temperature Dependence of the Optical Spectral Weight in the Cuprates: Role of Electron Correlations
• Measuring the gap in angle-resolved photoemission experiments on cuprates
• Optical and thermodynamic properties of the high-temperature superconductorHgBa2CuO4+δ
• Dynamical Breakup of the Fermi Surface in a Doped Mott Insulator
• In-Plane Spectral Weight Shift of Charge Carriers in YBa 2 Cu 3 O 6.9

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