Electronic cooling in graphene

R. Bistritzer, A. H. MacDonald

Research output: Contribution to journalArticlepeer-review


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 n3/2 with n being the electronic density. The temperature at which cooling via optical phonon emission begins to dominate depends on graphene carrier density.

Original languageEnglish
Article number206410
JournalPhysical Review Letters
Issue number20
StatePublished - 18 May 2009
Externally publishedYes


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