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Impact of higher-order coherences on the carrier dynamics in Landau-quantized graphene

Florian Wendler (Institutionen för teknisk fysik, Kondenserade materiens teori) ; Ermin Malic (Institutionen för teknisk fysik, Kondenserade materiens teori)
Proceedings of SPIE - The International Society for Optical Engineering. Terahertz Emitters, Receivers, and Applications VI, San Diego, United States, 9-10 August 2015 (0277-786X). Vol. 9585 (2015), p. 95850D.
[Konferensbidrag, refereegranskat]

We investigate the carrier dynamics in Landau-quantized graphene within the density matrix formalism. In particular, we focus on the carrier-light interaction addressing the impact of higher-order polarizations beyond the optical selection rules. We find that these terms are in general negligible, however, there are regimes, where they even become crucial for the carrier dynamics. Our calculations show that for short excitation pulses, very small Landau level broadenings, and certain configurations of magnetic field strength, Fermi energy, and excitation energy, higher-order polarizations need to be taken into account.

Nyckelord: carrier dynamics, carrier-light interaction, density matrix theory, higher-order polarizations, Landau-quantized graphene



Denna post skapades 2016-01-18. Senast ändrad 2016-01-18.
CPL Pubid: 230840

 

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Institutioner (Chalmers)

Institutionen för teknisk fysik, Kondenserade materiens teori (1900-2015)

Ämnesområden

Den kondenserade materiens fysik

Chalmers infrastruktur