Doping-dependent intraband carrier dynamics in Landau-quantized graphene
| Autor: | Ermin Malic, Florian Wendler |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Materials science
Condensed matter physics Terahertz radiation Graphene Doping Physics::Optics Fermi energy 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences 3. Good health law.invention Magnetic field law Physical Sciences 0103 physical sciences Microscopic theory 010306 general physics 0210 nano-technology Absorption (electromagnetic radiation) Excitation |
| Zdroj: | Physical Review B: covering condensed matter and materials physics vol.93(2016) Physical Review B |
| ISSN: | 2469-9969 2469-9950 |
| DOI: | 10.1103/physrevb.93.035432 |
| Popis: | We investigate the intraband carrier dynamics in Landau-quantized graphene after an optical excitation with low-energetic terahertz pulses. Based on a microscopic theory, we calculate time-dependent differential transmission spectra reflecting the Landau-level dynamics. Our calculations reveal a strong dependence on the Fermi energy E-F of the graphene sample as well as on the applied magnetic field B. We find that the pump pulse can lead to both absorption bleaching and absorption enhancement depending on B and the position of E-F with respect to the resonant Landau-level transition. As a result, positive and negative contributions in differential transmission spectra appear, in good agreement with recent pump-probe measurements. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|