Lattice dynamics in Sn nanoislands and cluster-assembled films

Kelly Houben, Sebastien Couet, Maarten Trekels, Enric Menéndez, Tobias Peissker, Jin Won Seo, Michael Y. Hu, Jiyong Y. Zhao, Esen E. Alp, Sam Roelants, Bart Partoens, Milorad V. Milošević, François M. Peeters, Dimitrios Bessas, Simon A. Brown, André Vantomme, Kristiaan Temst, Margriet J. Van Bael

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6 Citations (Scopus)


© 2017 American Physical Society. To unravel the effects of phonon confinement, the influence of size and morphology on the atomic vibrations is investigated in Sn nanoislands and cluster-assembled films. Nuclear resonant inelastic x-ray scattering is used to probe the phonon densities of states of the Sn nanostructures which show significant broadening of the features compared to bulk phonon behavior. Supported by ab initio calculations, the broadening is attributed to phonon scattering and can be described within the damped harmonic oscillator model. Contrary to the expectations based on previous research, the appearance of high-energy modes above the cutoff energy is not observed. From the thermodynamic properties extracted from the phonon densities of states, it was found that grain boundary Sn atoms are bound by weaker forces than bulk Sn atoms.
Original languageEnglish
Article number155413
JournalPhysical Review B
Issue number15
Publication statusPublished - 10 Apr 2017


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