TY  - JOUR
AU  - Balster, T.
AU  - Tautz, F. S.
AU  - Polyakov, V. M.
AU  - Ibach, H.
AU  - Sloboshanin, S.
AU  - Öttking, R.
AU  - Schaefer, J. A.
TI  - Strong dispersion of the surface optical phonon of silicon carbide in the near vicinity of the surface Brillouin zone center
JO  - Surface science
VL  - 600
SN  - 0039-6028
CY  - Amsterdam
PB  - Elsevier
M1  - PreJuSER-53183
SP  - 2886 - 2893
PY  - 2006
N1  - Record converted from VDB: 12.11.2012
AB  - The surface optical or Fuchs-Kliewer phonons of the (0 0 1) surface of 3C-SiC and the Si-terminated (0 0 0 1) surfaces of 4H- and 6H-SiC have been investigated with high resolution electron energy loss spectroscopy (HREELS). For each of the SiC polytypes the frequency of the surface optical phonon changes with surface reconstruction, indicating subtle differences in the static polarization at differently reconstructed surfaces. Due to their anisotropy, hexagonal surfaces exhibit a second, much weaker Fuchs-Kliewer mode. For all surfaces under examination, a linear dispersion of the Fuchs-Kliewer mode frequency has been found for wave vectors close to the Gamma-point. This dispersion can be explained by dynamical dipole coupling between atomic oscillators at the surface of the highly polar silicon carbide. (c) 2006 Elsevier B.V. All rights reserved.
KW  - J (WoSType)
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000239317200012
DO  - DOI:10.1016/j.susc.2006.05.031
UR  - https://juser.fz-juelich.de/record/53183
ER  -