Format

Send to

Choose Destination
Phys Rev Lett. 2009 May 22;102(20):206410. Epub 2009 May 21.

Electronic cooling in graphene.

Author information

1
Department of Physics, The University of Texas at Austin, Austin, Texas 78712, USA.

Abstract

Energy transfer to acoustic phonons is the dominant low-temperature cooling channel of electrons in a crystal. For cold neutral graphene we find that the weak cooling power of its acoustic modes relative to their heat capacity leads to a power-law decay of the electronic temperature when far from equilibrium. For heavily doped graphene a high electronic temperature is shown to initially decrease linearly with time at a rate proportional to n;{3/2} with n being the electronic density. The temperature at which cooling via optical phonon emission begins to dominate depends on graphene carrier density.

Supplemental Content

Full text links

Icon for American Physical Society
Loading ...
Support Center