Abstract
We have analyzed experimental evidence for an anomalous transfer of spectral weight from high-to low-energy scales in both electron-and hole-doped cuprates as a function of doping. X-ray scattering, optical, and photoemission spectra are all found to show that the high-energy spectral weight decreases with increasing doping at a rate much faster than predictions of the large U-limit calculations. The observed doping evolution is however well described by an intermediate coupling scenario where the effective Hubbard U is comparable to the bandwidth. The experimental spectra across various spectroscopies are inconsistent with fixed-U exact diagonalization or quantum Monte Carlo calculations, and suggest a significant doping dependence of the effective U in the cuprates.
Keywords
U-limit calculations, t-J models, doping evolution, spectral weight, cuprates
Subject Categories
X-rays - Scattering, Photoemission, Spectrum analysis
Disciplines
Physics
Publisher
American Physical Society
Publication Date
12-1-2010
Rights Information
Copyright 2010 American Physical Society.
Rights Holder
American Physical Society
Recommended Citation
Markiewicz, R. S.; Das, Tanmoy; and Bansil, A., "Failure of t-J models in describing doping evolution of spectral weight in x-ray scattering, optical, and photoemission spectra of cuprates" (2010). Physics Faculty Publications. Paper 382.
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Notes
Originally published in Physical Review B v.82 (2010): 224501. DOI: 10.1103/PhysRevB.82.224501