title: Quasiparticle electronic and optical properties of the Si-Sn system.
abstract: The Si(1-x)Sn(x) material system is an interesting candidate for an optically active material compatible with Si. Based on density functional theory with quasiparticle corrections we calculate the electronic band structure of zinc-blende SiSn under both compressive and tensile strain. At 2.2% tensile strain the band gap becomes direct with a magnitude of 0.85 eV. We develop an accurate tight-binding parameterization of the electronic structure and calculate the optical properties of SiSn. Furthermore, the silicide SiSn(2) is investigated and found to have metallic character.
authors.affiliation: Department of Physics and Nanotechnology, Aalborg University, 9220 Aalborg Øst, Denmark.
authors.forename: Rasmus V S
authors.initials: RV
authors.lastname: Jensen
authors.forename: Thomas G
authors.initials: TG
authors.lastname: Pedersen
authors.forename: Arne N
authors.initials: AN
authors.lastname: Larsen