Doping-dependent intraband carrier dynamics in Landau-quantized graphene
Artikel i vetenskaplig tidskrift, 2016

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.

Författare

Florian Wendler

Chalmers, Fysik, Kondenserade materiens teori

Ermin Malic

Chalmers, Fysik, Kondenserade materiens teori

Physical Review B: covering condensed matter and materials physics

2469-9969 (eISSN)

Vol. 93

Ämneskategorier

Fysik

DOI

10.1103/PhysRevB.93.035432