@article{363,
  keywords = {paper},
  author = {Silvana Botti and N Vast and Lucia Reining and Olevano V and LC Andreani},
  title = {Ab initio calculations of the anisotropic dielectric tensor of GaAs/AlAs superlattices},
  abstract = {The static dielectric properties of (001)(GaAs)(p)/(AlAs)(p) superlattices have been calculated as a function of their period p for 1 less than or equal to p less than or equal to 12, starting from density-functional theory. The interplay between quantum confinement and local field effects is shown to be crucial. For light polarized in the growth direction it leads to the otherwise surprising justification of the use of a classical effective medium theory, even for the smallest periods. Only the inclusion of both contributions allows in ab initio and in semiempirical calculations to reproduce the experimentally observed birefringence.},
  year = {2002},
  journal = {Phys. Rev. Lett.},
  volume = {89},
  number = {21},
  month = {NOV 18},
  publisher = {AMERICAN PHYSICAL SOC},
  address = {ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA},
  url = {http://dx.doi.org/10.1103/PhysRevLett.89.216803},
  doi = {10.1103/PhysRevLett.89.216803},
}