Tunable nano Peltier cooling device from geometric effects using a single graphene nanoribbon
Wan-Ju Li1,Dao-Xin Yao2(),E. W. Carlson1,*()
1. Department of Physics, Purdue University, West Lafayette, IN 47907, USA
2. State Key Laboratory of Optoelectronic Materials and Technologies, Sun Yat-Sen University, Guangzhou 510275, China
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 nanoribbon laid on an array of curved nano cylinders can be used to create a targeted and tunable cooling device. Using two different approaches, the Nonequilibrium 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 structure proposed here helps pave the way toward designing graphene electronics which use geometry rather than gating to control devices.
Corresponding Author(s):
Dao-Xin Yao and E. W. Carlson
引用本文:
. [J]. Frontiers of Physics, 2014, 9(4): 472-476.
Wan-Ju Li, Dao-Xin Yao, E. W. Carlson. Tunable nano Peltier cooling device from geometric effects using a single graphene nanoribbon. Front. Phys. , 2014, 9(4): 472-476.
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