Disorder-perturbed Landau levels in high electron mobility epitaxial graphene
arXiv:1410.4415 · doi:10.1103/PhysRevB.90.195433
Abstract
We show that the Landau levels in epitaxial graphene in presence of localized defects are significantly modified compared to those of an ideal system. We report on magneto-spectroscopy experiments performed on high quality samples. Besides typical interband magneto-optical transitions, we clearly observe additional transitions that involve perturbed states associated to short-range impurities such as vacancies. Their intensity is found to decrease with an annealing process and a partial self-healing over time is observed. Calculations of the perturbed Landau levels by using a delta-like potential show electronic states both between and at the same energies of the Laudau levels of ideal graphene. The calculated absorption spectra involving all perturbed and unperturbed states are in very good agreement with the experiments.
References in corpus (14)
- The electronic properties of graphene
- Electronic Properties of Disordered Two-Dimensional Carbon
- Electronic Properties of Graphene in a Strong Magnetic Field
- Approaching the Dirac point in high mobility multi-layer epitaxial graphene
- Landau level spectroscopy of ultrathin graphite layers
- Large area and structured epitaxial graphene produced by confinement controlled sublimation of silicon carbide
- Magneto-optical properties of multilayer graphenes
- Dirac electronic states in graphene systems: Optical spectroscopy studies
- Resonant low-energy electron scattering on short-range impurities in graphene
- Carrier scattering from dynamical magneto-conductivity in quasi-neutral epitaxial graphene
- Bilayer graphene inclusions in rotational-stacked multilayer epitaxial graphene
- Observation of the quantum Hall effect in epitaxial graphene on SiC(0001) with oxygen adsorption
- Graphing and Grafting Graphene: Classifying Finite Topological Defects
- Magnetoplasmons bound to short-range impurities in graphene: Symmetries and optics
Cited by in corpus (3)
- Colossal infrared and terahertz magneto-optical activity in a two-dimensional Dirac material
- Unconventional Features in the Quantum Hall Regime of Disordered Graphene: Percolating Impurity States and Hall Conductance Quantization
- High-Order Multipole Radiation from Quantum Hall States in Dirac Materials