Journal
PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS
Volume 246, Issue 11-12, Pages 2802-2805Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/pssb.200982307
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Funding
- Research Foundation-Flanders (FWO-Vl)
- Postdoctoral Fellow of the Research Foundation-Flanders (FWO-Vl).
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Starting from an empirical force constant model of valence interactions and calculating by Ewald's method the electrostatic force constants, we derive the dynamical matrix for a monolayer and for multilayer systems of hexagonal boron nitride (h-BN). Solution of the secular problem leads to the corresponding phonon dispersion relations. The interplay between valence forces and Coulomb forces is discussed. A comparison with previous results on graphene and graphene multilayers is made. Our spectra on the h-BN monolayer are rather similar to previous ab initio theory results. Comparison is also made with Raman and infrared experimental results. (C) 2009 WILEYNCH Verlag GmbH & Co. KGaA, Weinheim
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