The optical sum rule in strongly correlated systems

2008/03/27 by E. Z. Kuchinskii, N. A. Kuleeva, I. A. Nekrasov +1 · 1 citation
Materials Science · Physics and Astronomy · #Electronic and Structural Properties of Oxides #Ground state #Iron-based superconductors research #Optical conductivity #Physics of Superconductivity and Magnetism #Pseudogap #Solid-state physics #State (computer science) #Sum rule in quantum mechanics #cond-mat.dis-nn #cond-mat.str-el

paper · pdf · doi:10.1134/s1063776108080128

published as JETP 107 (2008) 281 · 7 pages, 9 figures

arxiv created 2008/03/27 · openalex publication_date 2008/08/01 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

Abstract

We discuss the problem of a possible “violation” of the optical sum rule in the normal (nonsuperconducting) state of strongly correlated electronic systems, using our recently proposed DMFT + Σ approach applied to two typical models: the “hot spot” model of the pseudogap state and the disordered Anderson-Hubbard model. We explicitly demonstrate that the general Kubo single-band sum rule is satisfied for both models, but the optical integral itself is in general dependent on temperature and characteristic parameters, such as the pseudogap width, correlation strength, and disorder scattering, leading to an effective “violation” of the optical sum rule, which may be observed in experiments.

Citations

• In-plane optical spectral weight transfer in optimally dopedBi2Sr2Ca2Cu3O10
• Optical sum rule anomalies in the cuprates: Interplay between strong correlation and electronic band structure
• Statistical-Mechanical Theory of Irreversible Processes. I. General Theory and Simple Applications to Magnetic and Conduction Problems
• Optical and thermodynamic properties of the high-temperature superconductorHgBa2CuO4+δ

Cited by

• Electrodynamics of correlated electron materials