Strong correlation effects and optical conductivity in electron doped cuprates

Details Strong correlation effects and optical conductivity in electron doped cuprates Strong correlation effects and optical conductivity in electron doped cuprates

2008-07-26

arxiv.org/abs/0807.4257v1

Physics

Condensed Matter

Superconductivity

5 pages, 4 figures

Scientific paper

We demonstrate that most features ascribed to strong correlation effects in various spectroscopies of the cuprates are captured by a calculation of the self-energy incorporating effects of spin and charge fluctuations. The self energy is calculated over the full doping range of electron-doped cuprates from half filling to the overdoped system. The spectral function reveals four subbands, two widely split incoherent bands representing the remnant of the split Hubbard bands, and two additional coherent, spin- and charge-dressed in-gap bands split by a spin-density wave, which collapses in the overdoped regime. The incoherent features persist to high doping, producing a remnant Mott gap in the optical spectra, while transitions between the in-gap states lead to pseudogap features in the mid-infrared.

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