Dispersion relation of charge gap excitations in quasi-1D Mott insulators studied by resonant X-ray scattering

D. Qian, Yinwan Li, M. Z. Hasan, D. M. Casa, T. Gog, Y. D. Chuang, K. Tsutsui, T. Tohyama, S. Maekawa, H. Eisaki, S. Uchida

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Abstract

Momentum dependence of charge excitations across the effective Mott gap in several quasi-low-dimensional model cuprates with different effective dimensionalities is studied using high resolution inelastic X-ray scattering by working near Copper k-edge resonance which allows us to extract the dispersion relations of the particle-hole pair excitations at the gap edge. Besides electron-electron correlation, momentum dependence of the gap-excitations is found to be strongly dependent on the effective dimensionality (or topology) of the 3dx2-y2 network.

Original languageEnglish (US)
Pages (from-to)2212-2215
Number of pages4
JournalJournal of Physics and Chemistry of Solids
Volume66
Issue number12
DOIs
StatePublished - Dec 2005

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

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    Qian, D., Li, Y., Hasan, M. Z., Casa, D. M., Gog, T., Chuang, Y. D., Tsutsui, K., Tohyama, T., Maekawa, S., Eisaki, H., & Uchida, S. (2005). Dispersion relation of charge gap excitations in quasi-1D Mott insulators studied by resonant X-ray scattering. Journal of Physics and Chemistry of Solids, 66(12), 2212-2215. https://doi.org/10.1016/j.jpcs.2005.09.094