TY - JOUR
KW - paper
AU - Olivia Pulci
AU - F. Bechstedt
AU - G Onida
AU - Rodolfo Del Sole
AU - Lucia Reining
AB - We present ab initio calculations for both the wave functions and the energies of single quasiparticles. The conventional quasiparticle approach evaluates energy-level corrections to first order in the difference between the self-energy and the Kohn-Sham exchange-correlation potential. Here,we also recalculate the quasiparticle states. At the example of the GaAs(110) surface we show that this nonperturbative treatment is important far surfaces with electronic states close in energy but different with respect to their localization. As a sensitive observable the reflectance anisotropy is studied. [S0163-1829(99)15947-2].
BT - Phys. Rev. B
CY - ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
DA - DEC 15
M1 - 24
N2 - We present ab initio calculations for both the wave functions and the energies of single quasiparticles. The conventional quasiparticle approach evaluates energy-level corrections to first order in the difference between the self-energy and the Kohn-Sham exchange-correlation potential. Here,we also recalculate the quasiparticle states. At the example of the GaAs(110) surface we show that this nonperturbative treatment is important far surfaces with electronic states close in energy but different with respect to their localization. As a sensitive observable the reflectance anisotropy is studied. [S0163-1829(99)15947-2].
PB - AMERICAN PHYSICAL SOC
PP - ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
PY - 1999
SP - 16758
EP - 16761
T2 - Phys. Rev. B
TI - State mixing for quasiparticles at surfaces: Nonperturbative GW approximation
VL - 60
ER -