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23 April 2024

» arxiv » cond-mat/9808064

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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 ;
Date:	6 Aug 1998
Journal:	Europhys. Lett. 43, 463 (1998)
Subject:	Strongly Correlated Electrons \| cond-mat.str-el
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.
Source:	arXiv, cond-mat/9808064
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