Neutron scattering by polaritons: Mechanical excitation of the polariton

F. Sacchetti, Annabella Selloni

Research output: Contribution to journalArticlepeer-review

1 Scopus citations


The displacement-displacement correlation function in the case of an isotropic ionic crystal with several optic branches has been calculated to determine the inelastic-scattering neutron cross section. We have examined the feasibility of an experiment to measure the dispersion curves and the density of states of the polar modes. The infrared electromagnetic field outside the crystal associated with the polariton excitation has been considered and found directly related to the polariton density of states. Though relevant information can be gained by this kind of experiment, its feasibility seems to be subordinate to the planned fulfilment of the high-energy pulsed neutron sources.

Original languageEnglish (US)
Pages (from-to)2286-2291
Number of pages6
JournalPhysical Review B
Issue number6
StatePublished - 1976

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics


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