Observation of three-magnon light scattering in CuGeO3
Abstract
Temperature and magnetic field dependent polarized Brillouin spectra of CuGeO3 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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