
TY  - JOUR
A1  - Josefsson, TW 
A1  - Smith, AE 
T1  - Local-field Effects in the High-q-vector Dielectric Response of Si
JF  - Australian Journal of Physics
JO  - Aust. J.  Phys.
Y1  - 1993
VL  - 46
IS  - 5
SP  - 635
EP  - 646
KW  - 
UR  - https://doi.org/10.1071/PH930635 
N2  - The influence of microscopic or local fields on the full frequency- and wavevector-dependent dielectric loss function of Si has been calculated, based on accurate empirical pseudopotential calculations of the electronic structure. It is shown that local-field effects, dramatically significant at optical (q ~ 0) wavevectors, diminish with increasing magnitude of q to negligible proportions as q approaches the Brillouin zone boundary. In addition it is shown that the calculated volume-plasmon dispersion relation is improved in comparison with experimental results by the inclusion of local-field effects. 
ER  -

