TY - JOUR
KW - paper
AU - Maurizia Palummo
AU - Olivia Pulci
AU - A Marini
AU - Lucia Reining
AU - Rodolfo Del Sole
AB - We extend the three-layer model for energy loss calculation to include many-body effects in an ab initio framework. The electron energy loss spectrum of the C(100)2x1 surface is calculated and compared with the existing experimental results. We show how many-body effects, namely self-energy, local-fields, and electron-hole interaction, deeply influence the dielectric response and how their inclusion is essential to have good agreement with the experiment. A strong anisotropic behavior of local-field effects on the dielectric response has been observed, while the inclusion of the electron-hole attractive interaction produces a surface-state exciton with binding energy of about 1 eV, confirming a recent theoretical-experimental study of the optical spectra of this surface.
BT - Phys. Rev. B
CY - ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
DA - DEC
DO - 10.1103/PhysRevB.74.235431
M1 - 23
N2 - We extend the three-layer model for energy loss calculation to include many-body effects in an ab initio framework. The electron energy loss spectrum of the C(100)2x1 surface is calculated and compared with the existing experimental results. We show how many-body effects, namely self-energy, local-fields, and electron-hole interaction, deeply influence the dielectric response and how their inclusion is essential to have good agreement with the experiment. A strong anisotropic behavior of local-field effects on the dielectric response has been observed, while the inclusion of the electron-hole attractive interaction produces a surface-state exciton with binding energy of about 1 eV, confirming a recent theoretical-experimental study of the optical spectra of this surface.
PB - AMERICAN PHYSICAL SOC
PP - ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
PY - 2006
T2 - Phys. Rev. B
TI - Ab initio calculation of many-body effects on the EEL spectrum of the C(100) surface
UR - http://dx.doi.org/10.1103/PhysRevB.74.235431
VL - 74
ER -