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 outsideKorK 0 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

Bechstedt, F., Matthes, L., Gori, P., Pulci, O. (2012). Infrared absorbance of silicene and germanene. APPLIED PHYSICS LETTERS, 100, 261906 [10.1063/1.4731626].

Infrared absorbance of silicene and germanene

PULCI, OLIVIA
2012-01-01

Abstract

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 outsideKorK 0 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
2012
Pubblicato
Rilevanza internazionale
Articolo
Esperti anonimi
Settore FIS/03 - FISICA DELLA MATERIA
English
Con Impact Factor ISI
Bechstedt, F., Matthes, L., Gori, P., Pulci, O. (2012). Infrared absorbance of silicene and germanene. APPLIED PHYSICS LETTERS, 100, 261906 [10.1063/1.4731626].
Bechstedt, F; Matthes, L; Gori, P; Pulci, O
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2108/78584
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