Tunable Electronic, Optical, and Thermal Properties of two- dimensional Germanene via an external electric field.

摘要: In this paper, we present a tight-binding model based on DFT calculations for investigation the electronic and optical properties of monolayer Germanene. The thermal are investigated using Green function method. required tight binding parameters including onsite energies third nearest neighbors hopping overlap integrals obtained our calculations. Germanene is semiconductor with zero band gap linear dispersion around K point. opening occurs in presence bias voltage. increased linearly increase voltage strength. results position two first peaks Infrared region same results. By applying increasing voltage, dielectric shows blue shift by reduction peak intensity energy range E < 1 eV. conductivity heat capacity temperature due to charge carriers excitation them conduction bands. absence U = 0 larger than that U ≠ 0 they decrease further strength increasing, bias.