Enhanced Landau-Placzek ratio in a heavy fermion metal observed by Brillouin scattering |
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| Authors: | R Mock G Güntherodt |
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| Institution: | (1) II. Physikalisches Institut, Universität Köln, Templergraben 55, D-5100 Aachen, Germany;(2) Present address: Siemens AG, ZT-ZFE AMF 42, D-8000 München 83, Germany;(3) Present address: II. Physikalisches Institut, RWTH Aachen, D-5100 Aachen, Germany |
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| Abstract: | Brillouin spectroscopy of the heavy fermion metal UPt3 shows strong quasielastic scattering, which has no analogue in ordinary metals. An enhanced Landau-Placzek ratio relating the quasielastic to the inelastic scattering intensity is deduced from the line shape analysis. The quasielastic line is of nonmagnetic origin and is attributed to electron density fluctuations as predicted by a recent theory of hydrodynamic fluctuations in heavy fermion systems. |
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