Details

Autor(en) / Beteiligte

• Bechstedt, Friedhelm
• Matthes, Lars
• Gori, Paola
• Pulci, Olivia

Titel

Infrared absorbance of silicene and germanene

Ist Teil von

• Applied physics letters, 2012-06, Vol.100 (26)

Erscheinungsjahr

2012

Link zum Volltext

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Calculating the complex dielectric function for optical interband transitions we show that the two-dimensional crystals silicene and germanene possess the same low-frequency absorbance as graphene. It is determined by the Sommerfeld finestructure constant. Deviations occur for higher frequencies when the first interband transitions outside K or K′ contribute. The low-frequency results are a consequence of the honeycomb geometry but do not depend on the group-IV atom, the sheet buckling, and the orbital hybridization. The two-dimensional crystals may be useful as absorption normals in silicon technology.