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 c...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 Nonequilibrium Green＇s Function （NEGF） method and experimental inputs, we predict that the cooling kW/cm2, on par with the best known techniques power of such a device can approach the order of 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.展开更多
基金It is a pleasure to thank Y. Chen, E.- A. Kim, and Y. L. Loh for conversations. W. J. Li would like to thank Vinh Quang Diep and Seokmin Hong for many useful discussions. W. J. Li, D. X. Yao, and E. W. Carlson acknowledge support from Research Corporation for Science Advancement and NSF Grant No. DMR 11-06187. W. J. Li acknowledges support from the Purdue Research Foundation. D. X. Yao aeknowledgcs support from the National Basic Research Program of China （No. 2012CB821400）, the National Natural Science Foundation of China （Grant Nos. 11074310 and 11275279）, Research Fund for the Doctoral Program of Higher Education of China （20110171110026）, and NCET-11-0547. EWC thanks Ecole Superieure de Physique et de Chimie Industrielles （ESPCI） for hospitality.
文摘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 Nonequilibrium Green＇s Function （NEGF） method and experimental inputs, we predict that the cooling kW/cm2, on par with the best known techniques power of such a device can approach the order of 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.
