Abstract
We present a computation of Cu K-edge resonant inelastic x-ray scattering (RIXS) spectra for electron-doped cuprates, which includes coupling to bosonic fluctuations. Comparison with experiment over a wide range of energy and momentum transfers allows us to identify the signatures of three key normal-state energy scales: the pseudogap, charge-transfer gap, and Mott gap. The calculations involve a three-band Hubbard Hamiltonian based on dₓ2₋y2 and O pₓ, py orbitals, with a self-energy correction which arises due to spin and charge fluctuations. Our theory reproduces characteristic features, e.g., gap collapse, large spectral weight broadening, and spectral weight transfer as a function of doping, as seen in experiments.
Keywords
doping, gap collapse, large spectral weight broadening, spectral weight transfer, coexisting pseudogap, charge-transfer-gap, Mott-gap energy scales
Subject Categories
X-rays - Scattering, Spectrum analysis, Superconductors
Disciplines
Physics
Publisher
American Physical Society
Publication Date
2-6-2012
Rights Information
Copyright 2012 American Physical Society.
Rights Holder
American Physical Society
Recommended Citation
Basak, Susmita; Das, Tanmoy; Lin, Hsin; Hasan, M. z.; Markiewicz, R. S.; and Bansil, A., "Coexisting pseudogap, charge-transfer-gap, and Mott-gap energy scales in the resonant inelastic x-ray scattering spectra of electron-doped cuprate superconductors" (2012). Physics Faculty Publications. Paper 360.
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Notes
Originally published in Physical Review B v.85 (2012): 075104. DOI: 10.1103/PhysRevB.85.075104