Recent time-of-flight measurements have been interpreted in terms of a force-constant model. We show that for phonon waves propagating along the ΓX direction, containing nearest neighbors, it is necessary to introduce a large softening of the lateral surface force constants (40%) in agreement with earlier calculations on the Ag(111) surface.
Theory of surface resonant phonons on the open (110) surface of Silver / FRANCHINI, Anna; SANTORO, Giorgio; BORTOLANI, Virginio; WALLIS, R. F.. - In: PHYSICAL REVIEW. B, CONDENSED MATTER. - ISSN 0163-1829. - STAMPA. - 38:(1988), pp. 12139-12143. [10.1103/PhysRevB.38.12139]
Theory of surface resonant phonons on the open (110) surface of Silver
FRANCHINI, Anna;SANTORO, Giorgio;BORTOLANI, Virginio;
1988
Abstract
Recent time-of-flight measurements have been interpreted in terms of a force-constant model. We show that for phonon waves propagating along the ΓX direction, containing nearest neighbors, it is necessary to introduce a large softening of the lateral surface force constants (40%) in agreement with earlier calculations on the Ag(111) surface.
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