Simdyankin SI, Elliott SR, Hajnal Z, Niehaus TA, Frauenheim T1 April 2004Journal article Journal:Physical Review BVolume:69Issue:14, American Physical Society (APS), p.144202No abstract availableKeywords:34 Chemical Sciences , 51 Physical Sciences , 5104 Condensed Matter Physics , Generic health relevance DOI10.1103/physrevb.69.144202