Microscopic collective dynamics in liquidpara−H2
| Autor: | Francisco Javier Bermejo, Javier Dawidowski, Peter Verkerk, M. T. Fernández-Díaz, Carlos Cabrillo, R. Fernandez-Perea, S. M. Bennington, B. Fåk |
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| Rok vydání: | 1999 |
| Předmět: | |
| Zdroj: | Physical Review B. 60:15154-15162 |
| ISSN: | 1095-3795 0163-1829 |
| DOI: | 10.1103/physrevb.60.15154 |
| Popis: | Well-defined phonons with strong anomalous (upward) dispersion are observed by inelastic neutron scattering in liquid $para\ensuremath{-}{\mathrm{H}}_{2}$ at a temperature of 15.7 K. The damping, being very small for the low-$Q$ phonons, increases with wave vector Q, and only broad features are observed for $Q\ensuremath{\gtrsim}1{\mathrm{\AA{}}\mathrm{}}^{\ensuremath{-}1}.$ This behavior is shown to deviate strongly from results of molecular simulations of a fully classical analogue using a realistic potential. |
| Databáze: | OpenAIRE |
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