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

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

arxiv: cond-mat/9808064 · v1 · submitted 1998-08-06 · ❄️ cond-mat.str-el

Dopant-Bound Spinons in Cu_(1-x)Zn_xGeO₃

G. Els , G.S. Uhrig , P. Lemmens , H. Vonberg , P.H.M. van Loosdrecht , G. Guentherodt , O. Fujita , J. Akimitsu

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G. Dhalenne A. Revcolevschi

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classification ❄️ cond-mat.str-el

keywords xgeodopant-boundlightmodescatteringsingletspinonsbelow

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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.

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Dopant-Bound Spinons in Cu_(1-x)Zn_xGeO₃

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