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The phonon dispersion relation (PDR), i.e., the dependence of phonon frequency ω on its wavevector q, ω(q), was measured traditionally by inelastic neutron scattering (INS) or inelastic X-ray scattering (IXS). A new approach to measure PDR by Raman scattering (RS) of nanostructures was proposed and applied to observe the longitudinal optical (LO) PDR of diamond successfully. Due to the higher resolution...
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