Optical transitions in two-dimensional topological insulators with point defects
arXiv:1609.04047 · doi:10.1016/j.physb.2016.09.008
Abstract
Nontrivial properties of electronic states in topological insulators are inherent not only to the surface and boundary states, but to bound states localized at structure defects as well. We clarify how the unusual properties of the defect-induced bound states are manifested in optical absorption spectra in two-dimensional topological insulators. The calculations are carried out for defects with short-range potential. We find that the defects give rise to the appearance of specific features in the absorption spectrum, which are an inherent property of topological insulators. They have the form of two or three absorption peaks that are due to intracenter transitions between electron-like and hole-like bound states.
arXiv comment7 pages, 3 figures
References in corpus (26)
- Topological Insulators
- Topological insulators and superconductors
- Graphene Photonics and Optoelectronics
- Quantum Spin Hall Effect and Topological Phase Transition in HgTe Quantum Wells
- Quantum Spin Hall Insulator State in HgTe Quantum Wells
- Crossover of Three-Dimensional Topological Insulator of Bi2Se3 to the Two-Dimensional Limit
- Nonlocal edge state transport in the quantum spin Hall state
- The Quantum Spin Hall Effect: Theory and Experiment
- The Helical Liquid and the Edge of Quantum Spin Hall Systems
- Strong surface scattering in ultrahigh mobility Bi2Se3 topological insulator crystals
- Impurity-induced states on the surface of 3D topological insulators
- Inelastic electron backscattering in a generic helical edge channel
- Observation of a Helical Luttinger-Liquid in InAs/GaSb Quantum Spin Hall Edges
- Transport in disordered two-dimensional topological insulator
- Resistance of helical edges formed in a semiconductor heterostructure
- Quasiparticle scattering in two dimensional helical liquid
- Strong potential impurities on the surface of a topological insulator
- Theory of quasiparticle interference on the surface of a strong topological insulator
- Magnetic field effects on edge and bulk states in topological insulators based on HgTe/CdHgTe quantum wells with strong natural interface inversion asymmetry
- Z2 invariant protected bound states in topological insulators
- Nonlocal resistance and its fluctuations in microstructures of band-inverted HgTe/(Hg,Cd)Te quantum wells
- Subsurface impurities and vacancies in a three-dimensional topological insulator
- Electronic structure near an impurity and terrace on the surface of a 3-dimensional topological insulator
- Electronic states induced by nonmagnetic defects in two-dimensional topological insulators
- Two-dimensional topological insulator edge state backscattering by dephasing
- Non-magnetic defects in the bulk of two-dimensional topological insulators
Cited by in corpus (3)
- Conductance suppression by nonmagnetic point defects in helical edge channels of two-dimensional topological insulators
- Electrically controlled crossing of energy levels in quantum dots in two-dimensional topological insulators
- Long-range perturbation of helical edge states by nonmagnetic defects in two-dimensional topological insulators