1887
banner image
No data available.
Please log in to see this content.
You have no subscription access to this content.
No metrics data to plot.
The attempt to load metrics for this article has failed.
The attempt to plot a graph for these metrics has failed.
Efficient orientational carrier relaxation in optically excited graphene
Rent:
Rent this article for
USD
10.1063/1.4767356
/content/aip/journal/apl/101/21/10.1063/1.4767356
http://aip.metastore.ingenta.com/content/aip/journal/apl/101/21/10.1063/1.4767356
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

Schematic illustration of the electronic bandstructure of graphene (only the conduction band is shown). An excited electron can either scatter along or across the Dirac cone. The latter processes change the angle between the initial and the final states () giving rise to an isotropic carrier distribution.

Image of FIG. 2.
FIG. 2.

Carrier occupation is shown as a function of the momentum k and the angle around the Dirac point at different times . The initially highly anisotropic and centered non-equilibrium carrier occupation becomes redistributed due to the efficient many-particle relaxation dynamics. The white arrows indicate the scattering along and across the Dirac cone, which accounts for the isotropic carrier distribution already after 50 fs.

Image of FIG. 3.
FIG. 3.

Contour plot of the carrier occupation as a function of the momentum k and the angle comparing the relaxation dynamics taking into account only (a) carrier-carrier and (b) carrier-phonon scattering channels. The figure illustrates the crucial importance of phonons for reaching an isotropic carrier distribution within the first 50 fs.

Image of FIG. 4.
FIG. 4.

The same as in Fig. 3, however, comparing the carrier dynamics taking into account only the scattering with (a) and (b) phonons. It displays the relaxation in steps of the corresponding constant optical phonon energy. phonons preferably scatter across and along the Dirac cone.

Loading

Article metrics loading...

/content/aip/journal/apl/101/21/10.1063/1.4767356
2012-11-21
2014-04-17
Loading

Full text loading...

This is a required field
Please enter a valid email address
752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Efficient orientational carrier relaxation in optically excited graphene
http://aip.metastore.ingenta.com/content/aip/journal/apl/101/21/10.1063/1.4767356
10.1063/1.4767356
SEARCH_EXPAND_ITEM