TY - JOUR KW - Nanowires AU - Maurizia Palummo AU - Federico Iori AU - Rodolfo Del Sole AU - S. Ossicini AB - We present here an ab-initio study, within the Density Functional Theory (DFT), of the formation energy of doped Silicon Nanowires (Si-NWs). While this theoretical approach is appropriate to calculate the ground-state properties of materials, other methods, like Many-Body Perturbation Theory (MPBT) or Time Dependent Density Functional Theory (TDDFT), formally provide a correct description of the electronic excited states. Then, in the second part of this paper, we show how the many-body effects, introduced using the MBPT, modify the optical properties of the Si(100) surface. BT - Superlattices and Microstructures DO - DOI: 10.1016/j.spmi.2008.12.026 M1 - 1-2 N1 - NanoSEA2008 N2 - We present here an ab-initio study, within the Density Functional Theory (DFT), of the formation energy of doped Silicon Nanowires (Si-NWs). While this theoretical approach is appropriate to calculate the ground-state properties of materials, other methods, like Many-Body Perturbation Theory (MPBT) or Time Dependent Density Functional Theory (TDDFT), formally provide a correct description of the electronic excited states. Then, in the second part of this paper, we show how the many-body effects, introduced using the MBPT, modify the optical properties of the Si(100) surface. PY - 2009 SP - 234 EP - 239 T2 - Superlattices and Microstructures TI - Electronic properties and dielectric response of surfaces and nanowires of silicon from ab-initio approaches UR - http://www.sciencedirect.com/science/article/B6WXB-4VF0XVB-4/2/7f7e219d9e82ffc76628315e45e91ba2 VL - 46 SN - 0749-6036 ER -