Publikation: Ripplons in 4He films observed by neutron scattering
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1992
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Physical Review Letters. 1992, 68(16), pp. 2484-2488. Available under: doi: 10.1103/PhysRevLett.68.2484
Zusammenfassung
We report the first observation of ripplon excitations at large wave vectors. The experiments were performed on liquid-4He films of atomic thickness adsorbed on a graphite substrate. Neutron-scattering techniques were used to determine the inelastic structure factor of surface (ripplon) and bulklike (phonon-roton) elementary excitations. The lowest lying mode at low wave vectors is experimentally shown to be a surface mode; its dispersion relation agrees well with the quantum-hydrodynamic theory of Edwards and Saam. The predictions of recent microscopic models are compared to the data at high energies and momenta.
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530 Physik
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LAUTER, Hans J., Henri GODFRIN, V. L. P. FRANK, Paul LEIDERER, 1992. Ripplons in 4He films observed by neutron scattering. In: Physical Review Letters. 1992, 68(16), pp. 2484-2488. Available under: doi: 10.1103/PhysRevLett.68.2484BibTex
@article{Lauter1992Rippl-9430, year={1992}, doi={10.1103/PhysRevLett.68.2484}, title={Ripplons in 4He films observed by neutron scattering}, number={16}, volume={68}, journal={Physical Review Letters}, pages={2484--2488}, author={Lauter, Hans J. and Godfrin, Henri and Frank, V. L. P. and Leiderer, Paul} }
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