Low-Energy Surface-Phonons on alpha-Quartz (0001)

Wolfram Steurer (1) , A. Apfolter (1) , Markus Koch (1) , Wolfgang E. Ernst (1) , Bodil Holst (1) , Elin Sondergard (2) , Stephen C. Parker (3)

1 Institute of Experimental Physics [Graz]
2 SVI - Surface du Verre et Interfaces
3 Department of Chemistry

Calculated surface-phonon dispersion curves for a dry, a partly hydroxylated, and a fully hydroxylated alpha-quartz (0001) surface are presented and compared with first low-energy inelastichelium-atom scattering measurements. Qualitative agreement between calculations and the observed Rayleigh-wave dispersion curve is achieved for the dry quartz surface. A signature effect is seen in the calculated phonon dispersion curves for the fully hydroxylated surface.

Domaines: Science des matériaux [cond-mat.mtrl-sci]

Wolfram Steurer, A. Apfolter, Markus Koch, Wolfgang E. Ernst, Bodil Holst, et al.. Low-Energy Surface-Phonons on alpha-Quartz (0001). Physical Review B: Condensed Matter and Materials Physics (1998-2015), 2008, 78 (3), pp.035402. ⟨hal-00499424⟩