Resonant inelastic x-ray scattering study of holon-antiholon continuum in SrCuO2

Phys. Rev. Lett. 92, 137402 (2004) We report a resonant inelastic x-ray scattering study of charge excitations in the quasi-one-dimensional Mott insulator SrCuO2. We observe a continuum of low-energy excitations, in which a highly dispersive feature with a large sinusoidal dispersion (~1.1 eV) resid...

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Main Authors Kim, Young-June, Hill, J. P, Benthien, H, Essler, F. H. L, Jeckelmann, E, Choi, H. S, Noh, T. W, Motoyama, N, Kojima, K. M, Uchida, S, Casa, D, Gog, T
Format Journal Article
LanguageEnglish
Published 21.07.2003
Subjects
Physics - Strongly Correlated Electrons
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Summary:Phys. Rev. Lett. 92, 137402 (2004) We report a resonant inelastic x-ray scattering study of charge excitations in the quasi-one-dimensional Mott insulator SrCuO2. We observe a continuum of low-energy excitations, in which a highly dispersive feature with a large sinusoidal dispersion (~1.1 eV) resides. We have also measured the optical conductivity, and studied the dynamic response of the extended Hubbard model with realistic parameters, using a dynamical density-matrix renormalization group method. In contrast to earlier work, we do not find a long-lived exciton, but rather these results suggest that the excitation spectrum comprises a holon-antiholon continuum together with a broad resonance.
DOI:10.48550/arxiv.cond-mat/0307497