@article{215, keywords = {Nanowires}, author = {Maurizia Palummo and Federico Iori and Rodolfo Del Sole and S. Ossicini}, title = {Electronic properties and dielectric response of surfaces and nanowires of silicon from ab-initio approaches}, abstract = {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.}, year = {2009}, journal = {Superlattices and Microstructures}, volume = {46}, number = {1-2}, pages = {234-239}, issn = {0749-6036}, url = {http://www.sciencedirect.com/science/article/B6WXB-4VF0XVB-4/2/7f7e219d9e82ffc76628315e45e91ba2}, doi = {DOI: 10.1016/j.spmi.2008.12.026}, note = {NanoSEA2008}, }