1208.1912 (Wan-Ju Li et al.)

Tunable nano Peltier cooling device from geometric effects using a
single graphene nanoribbon    [PDF]

Wan-Ju Li, Dao-Xin Yao, E. W. Carlson

Based on the phenomenon of curvature-induced doping in graphene we propose a class of Peltier cooling devices, produced by geometrical effects, without gating. We show how a graphene nanorib- bon laid on an array of curved nano cylinders can be used to create a targeted and tunable cooling device. Using two different approaches, the Nonequlibrium Green's Function (NEGF) method and experimental inputs, we predict that the cooling power of such a device can approach the order of kW/cm2, on par with the best known techniques using standard superlattice structures. The struc- ture proposed here helps pave the way toward designing graphene electronics which use geometry rather than gating to control devices.

View original: http://arxiv.org/abs/1208.1912