Phonon Spectrum in a Nanoparticle Mechanically Coupled to a Substrate

Kelly R. Patton; Michael R. Geller

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Phonon Spectrum in a Nanoparticle Mechanically Coupled to a Substrate

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arxiv cond-mat/0106544 v1 pith:LC7CE36A submitted 2001-06-26 cond-mat.mes-hall cond-mat.mtrl-sci

Phonon Spectrum in a Nanoparticle Mechanically Coupled to a Substrate

Kelly R. Patton , Michael R. Geller This is my paper

classification cond-mat.mes-hall cond-mat.mtrl-sci

keywords phonondensity-of-statesexperimentnanoparticlesubstrateagreementapproximationcalculate

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We calculate the vibrational density-of-states in an insulating nanoparticle that is in weak mechanical contact with a semi-infinite substrate. The work is motivated by a recent experiment by Yang et al., where the low-energy phonon density-of-states of Y2O3 nanoparticles doped with Eu was measured. Preliminary results presented here, based on the conventional quasiparticle-pole approximation for the phonon propagator, are in reasonable agreement with experiment.

Phonon Spectrum in a Nanoparticle Mechanically Coupled to a Substrate

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