Collective charge modes in quasi-1D Mott insulator SrCuO2

L. Wray, D. Qian, Y. W. Li, H. Eisaki, M. Z. Hasan

Research output: Contribution to journalArticle

Abstract

Inelastic resonant X-ray scattering is carried out on SrCuO2, a model quasi one-dimensional spin 1/2 Mott insulator. Tuning excitation energy to a previously unstudied resonance allows insight into the effect of the intermediate state coupling to the fundamental charge modes exhibited by the sample. Redistribution of momentum and energy resolved spectral weight at the new resonance permits identification of features resembling the strong coupling prediction for the modes. Despite expected resonance enhancement, no spinon-like modes are observed above 0.5 eV (two-spinon threshold) in the measured scattering spectra.

Original languageEnglish (US)
Pages (from-to)460-461
Number of pages2
JournalPhysica C: Superconductivity and its applications
Volume460-462 I
Issue numberSPEC. ISS.
DOIs
StatePublished - Sep 1 2007

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

Keywords

  • Mott insulators
  • Parent cuprates
  • Spin-charge separation
  • Superconductivity

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