Effects of electron-impurity scattering on density of states in silicene: impurity bands and band-gap narrowing
arXiv:1609.05260 · doi:10.1103/PhysRevB.94.235308
Abstract
Considering the interband correlation, we present a generalized multiple-scattering approach of Green's function to investigate the effects of electron-impurity scattering on the density of states in silicene. The reduction of energy gaps in the case of relatively high chemical potential and the transformation of split-off impurity bands into band tails for low chemical potential are found. The dependency of optical conductivity on the impurity concentration is also discussed for frequency within the terahertz regime.
arXiv comment10 pages, 8 figures, submitted to PRB
References in corpus (25)
- Two and one-dimensional honeycomb structures of silicon and germanium
- Quantum Spin Hall Effect in Silicene
- Epitaxial Growth of a Silicene Sheet
- Low-energy effective Hamiltonian involving spin-orbit coupling in Silicene and Two-Dimensional Germanium and Tin
- Evidence of silicene in honeycomb structures of silicon on Ag(111)
- Electrically Tunable Band Gap in Silicene
- Electronic structure of silicon-based nanostructures
- Evidence for Dirac Fermions in a honeycomb lattice based on silicon
- Topological Insulator and Helical Zero Mode in Silicene under Inhomogeneous Electric Field
- Dynamical polarization, screening, and plasmons in gapped graphene
- Stability and electronic properties of two-dimensional silicene and germanene on graphene
- Quantum spin/valley Hall effect and topological insulator phase transitions in silicene
- Optical Signatures of the Tunable Band Gap and Valley-Spin Coupling in Silicene
- Current developments in silicene and germanene
- Dynamical Polarization Function, Plasmons and Screening in Silicene and Other Buckled Honeycomb Lattices
- Massive Dirac fermions in single-layer graphene
- AC/DC Spin and Valley Hall Effects in Silicene and Germanene
- Polarization Charge Distribution in Gapped Graphene
- Spin and valley polarization of plasmons in silicene due to external fields
- Is Silicene the Next Graphene?
- Quantum spin Hall effect induced by electric field in silicene
- Probing the Topological Phase Transition via Density Oscillations in Silicene and Germanene
- Intrinsic spin Hall effect in silicene: transition from spin Hall to normal insulator
- Low-temperature linear transport of two-dimensional massive Dirac fermions in silicene: residual conductivity and spin/valley Hall effects
- Coulomb Screening of 2D Massive Dirac Fermions