Dopant-Bound Spinons in Cu_(1-x)Zn_xGeO_3

G. Els; G. S. Uhrig; P. Lemmens; H. Vonberg; P. H. M. van Loosdrecht; G. Guentherodt; O. Fujita; J. Akimitsu; G. Dhalenne; A. Revcolevschi

doi:10.1209/epl/i1998-00382-3

Dopant-Bound Spinons in Cu_(1-x)Zn_xGeO_3

Strongly Correlated Electrons 2009-10-31 v1

Authors: G. Els , G. S. Uhrig , P. Lemmens , H. Vonberg , P. H. M. van Loosdrecht , G. Guentherodt , O. Fujita , J. Akimitsu , G. Dhalenne , A. Revcolevschi

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Abstract

Polarized inelastic light scattering experiments on Cu_(1-x)Zn_xGeO_3 (0<= x <= 0.045) single crystals show for x<>0 a new distinct mode at nearly half the energy of the singlet response below the spin-Peierls transition. The temperature, magnetic field, polarization, and doping dependencies of this mode are similar to those of the singlet bound state. The data are interpreted in terms of a spinon-assisted light scattering process. Position and form of the peak provide strong evidence for the presence of dopant-bound spinons in Cu_(1-x)Zn_xGeO_3.

Keywords

spinon dopant spin-Peierls transition inelastic light scattering CuGeO_3

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@article{arxiv.cond-mat/9808064,
  title  = {Dopant-Bound Spinons in Cu_(1-x)Zn_xGeO_3},
  author = {G. Els and G. S. Uhrig and P. Lemmens and H. Vonberg and P. H. M. van Loosdrecht and G. Guentherodt and O. Fujita and J. Akimitsu and G. Dhalenne and A. Revcolevschi},
  journal= {arXiv preprint arXiv:cond-mat/9808064},
  year   = {2009}
}

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4 pages, Latex with 3 figures, including EPL style files, Eur. Phys. Lett. in press

Dopant-Bound Spinons in Cu_(1-x)Zn_xGeO_3

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