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arxiv: cond-mat/9711047 · v1 · pith:DKFGRSINnew · submitted 1997-11-06 · ❄️ cond-mat.str-el

Observation of three-magnon light scattering in CuGeO₃

G. Els , P.H.M. van Loosdrecht , P. Lemmens , H. Vonberg , G. G\"untherodt (II. Physikalisches Institut , RWTH-Aachen , Germany) , G. S. Uhrig (Institut f\"ur Theoretische Physik
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Universit\"at zu K\"oln Germany.) O. Fujita J. Akimitsu (Department of Physics Aoyama Gakuin University Japan) G. Dhalenne A. Revcolevschi (Laboratoire de Chimie des Solides Universit\'e de Paris-Sud France)
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classification ❄️ cond-mat.str-el
keywords cugeofeaturelightscatteringthree-magnonadditionbeenbound
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Temperature and magnetic field dependent polarized Brillouin spectra of CuGeO_3 are reported. In addition to a bound singlet state at 30 cm^{-1}, a new feature has been observed at 18 cm^{-1}. This feature is interpreted in terms of a novel three-magnon light scattering process between excited triplet states.

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