Carrier Dynamics in Graphene: Ultrafast Many-Particle Phenomena
Journal article, 2017

Graphene is an ideal material to study fundamental Coulomb- and phonon-induced carrier scattering processes. Its remarkable gapless and linear band structure opens up new carrier relaxation channels. In particular, Auger scattering bridging the valence and the conduction band changes the number of charge carriers and gives rise to a significant carrier multiplication - an ultrafast many-particle phenomenon that is promising for the design of highly efficient photodetectors. Furthermore, the vanishing density of states at the Dirac point combined with ultrafast phonon-induced intraband scattering results in an accumulation of carriers and a population inversion suggesting the design of graphene-based terahertz lasers. Here, we review our work on the ultrafast carrier dynamics in graphene and Landau-quantized graphene is presented providing a microscopic view on the appearance of carrier multiplication and population inversion.

carrier multiplication

population inversion

carrier dynamics

graphene

Author

Ermin Malic

Chalmers, Physics, Condensed Matter Theory

T. Winzer

Florian Wendler

Samuel Brem

Chalmers, Physics, Condensed Matter Theory

Roland Jago

Chalmers, Physics, Condensed Matter Theory

A. Knorr

M. Mittendorff

J. C. Konig-Otto

T. Plotzing

D. Neumaier

H. Schneider

M. Helm

S. Winnerl

Annalen der Physik

0003-3804 (ISSN) 1521-3889 (eISSN)

Vol. 529 11

Subject Categories

Condensed Matter Physics

DOI

10.1002/andp.201700038

More information

Created

11/28/2017