TY - JOUR
KW - paper
AU - Silvana Botti
AU - N Vast
AU - Lucia Reining
AU - Olevano V
AU - LC Andreani
AB - 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.
BT - Phys. Rev. Lett.
CY - ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
DA - NOV 18
DO - 10.1103/PhysRevLett.89.216803
M1 - 21
N2 - 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.
PB - AMERICAN PHYSICAL SOC
PP - ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
PY - 2002
T2 - Phys. Rev. Lett.
TI - Ab initio calculations of the anisotropic dielectric tensor of GaAs/AlAs superlattices
UR - http://dx.doi.org/10.1103/PhysRevLett.89.216803
VL - 89
ER -