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Doping-dependent intraband carrier dynamics in Landau-quantized graphene

Florian Wendler (Institutionen för fysik, Kondenserade materiens teori (Chalmers)) ; Ermin Malic (Institutionen för fysik, Kondenserade materiens teori (Chalmers))
Physical Review B. Condensed Matter and Materials Physics (1098-0121). Vol. 93 (2016), 3,
[Artikel, refereegranskad vetenskaplig]

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.



Denna post skapades 2016-03-02. Senast ändrad 2016-03-24.
CPL Pubid: 232655

 

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Institutioner (Chalmers)

Institutionen för fysik, Kondenserade materiens teori (Chalmers)

Ämnesområden

Fysik

Chalmers infrastruktur

 


Projekt

Denna publikation är ett resultat av följande projekt:


Graphene-Based Revolutions in ICT And Beyond (GRAPHENE) (EC/FP7/604391)