2012, Friedhelm Bechstedt, Lars Matthes, Paola Gori and Olivia Pulci, "Infrared absorbance of silicene and germanene", Appl. Phys. Lett. 100, 261906 (27 June 2012) p. 261906-1Calculating 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.
2013, Lars Matthes, Olivia Pulci and Friedhelm Bechstedt, "Massive Dirac quasiparticles in the optical absorbance of graphene, silicene, germanene, and tinene", Journal of Physics: Condensed Matter 25 #39 (4 September 2013) 395305 p. 395305-1We present first-principles studies of the optical absorbance of the group IV honeycomb crystals graphene, silicene, germanene, and tinene.
2014, M E Dávila, L Xian, S Cahangirov, A Rubio and G Le Lay, "Germanene: a novel two-dimensional germanium allotrope akin to graphene and silicene", New J. Phys. 16 095002 (9 September 2014) p. 095002-2After the successful synthesis of silicene in 2012, which was followed by a surge of studies on elemental, novel two-dimensional (2D) materials beyond graphene, a daunting quest was to obtain germanene, the germanium-based analogue of graphene, already predicted to possibly exist in 2009.
