title: Confinement of vibrational modes within crystalline lattices using thin amorphous layers.
abstract: It is possible to confine vibrational modes to a crystal by encapsulating it within thin disordered layers with the same average properties as the crystal. This is not due to an impedance mismatch between materials but, rather, to higher order moments in the distribution of density and stiffness in the disordered phase-i.e. it is a result of material substructure. The concept is elucidated in an idealized one-dimensional setting and then demonstrated for a realistic nanocrystalline geometry. This offers the prospect of specifically engineering higher order property distributions as an alternate means of managing phonons.
authors.affiliation: Istituto Officina dei Materiali del CNR (CNR-IOM) Trieste, Via Bonomea 265, Trieste 34136, Italy.
authors.forename: Luigi
authors.initials: L
authors.lastname: Bagolini
authors.forename: Alessandro
authors.initials: A
authors.lastname: Mattoni
authors.forename: Mark T
authors.initials: MT
authors.lastname: Lusk