Thermoelectric-transport in metal/graphene/metal hetero-structure

doi:10.1088/1674-1056/19/3/037202

中国物理B ›› 2010, Vol. 19 ›› Issue (3): 37202-037202.doi: 10.1088/1674-1056/19/3/037202

Thermoelectric-transport in metal/graphene/metal hetero-structure

胡昊¹, 蔡金明¹, 张晨栋¹, 高敏¹, 潘毅¹, 杜世萱¹, 孙庆丰¹, 高鸿钧¹, 谢心澄², 牛谦³

(1)Beijing National Laboratory of Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China; (2)Beijing National Laboratory of Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;Department of Physics, Oklahoma State University, Stillwater,Oklahoma 74078, USA; (3)Department of Physics, University of Texas at Austin, USA

收稿日期:2009-08-19 修回日期:2009-10-27 出版日期:2010-03-15 发布日期:2010-03-15
基金资助:
Project supported by the National Natural Science Foundation of China (Grant No.~60621061), and the National Basic Research Program of China (Grant Nos.~2006CB921305 and 2009CB929103).

Thermoelectric-transport in metal/graphene/metal hetero-structure

Hu Hao(胡昊)^a), Cai Jin-Ming(蔡金明)^a), Zhang Chen-Dong(张晨栋)^a), Gao Min(高敏)^a), Pan Yi(潘毅)^a), Du Shi-Xuan(杜世萱)^a), Sun Qing-Feng(孙庆丰)^a), Niu Qian(牛谦)^b), Xie Xin-Cheng(谢心澄)^a)c), and Gao Hong-Jun(高鸿钧)^a)†

^a Beijing National Laboratory of Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China; ^b Department of Physics, University of Texas at Austin, USA; ^c Department of Physics, Oklahoma State University, Stillwater,Oklahoma 74078, USA

Received:2009-08-19 Revised:2009-10-27 Online:2010-03-15 Published:2010-03-15
Supported by:
Project supported by the National Natural Science Foundation of China (Grant No.~60621061), and the National Basic Research Program of China (Grant Nos.~2006CB921305 and 2009CB929103).

摘要/Abstract

摘要： We investigate the thermoelectric-transport properties of metal/graphene/metal hetero-structure. We use a single band tight-binding model to present the two-dimensional electronic band structure of graphene. Using the Landauer--Butticker formula and taking the coupling between graphene and the two electrodes into account, we can calculate the thermoelectric potential and current versus temperature. It is found that in spite of metal electrodes, the carrier type of graphene determines the electron motion direction driven by the difference in temperature between the two electrodes, while for n type graphene, the electrons move along the thermal gradient, and for p type graphene, the electrons move against the thermal gradient.

Abstract: We investigate the thermoelectric-transport properties of metal/graphene/metal hetero-structure. We use a single band tight-binding model to present the two-dimensional electronic band structure of graphene. Using the Landauer--Butticker formula and taking the coupling between graphene and the two electrodes into account, we can calculate the thermoelectric potential and current versus temperature. It is found that in spite of metal electrodes, the carrier type of graphene determines the electron motion direction driven by the difference in temperature between the two electrodes, while for n type graphene, the electrons move along the thermal gradient, and for p type graphene, the electrons move against the thermal gradient.

Key words: graphene, Landauer--Butticker formula, thermoelectricity, hetero-structure

中图分类号: (Metal-insulator-metal structures)

73.40.Rw

72.20.Pa (Thermoelectric and thermomagnetic effects) 73.63.-b (Electronic transport in nanoscale materials and structures) 73.21.-b (Electron states and collective excitations in multilayers, quantum wells, mesoscopic, and nanoscale systems) 71.15.Ap (Basis sets (LCAO, plane-wave, APW, etc.) and related methodology (scattering methods, ASA, linearized methods, etc.))

胡昊, 蔡金明, 张晨栋, 高敏, 潘毅, 杜世萱, 孙庆丰, 牛谦, 谢心澄, 高鸿钧. Thermoelectric-transport in metal/graphene/metal hetero-structure[J]. 中国物理B, 2010, 19(3): 37202-037202.

Hu Hao(胡昊), Cai Jin-Ming(蔡金明), Zhang Chen-Dong(张晨栋), Gao Min(高敏), Pan Yi(潘毅), Du Shi-Xuan(杜世萱), Sun Qing-Feng(孙庆丰), Niu Qian(牛谦), Xie Xin-Cheng(谢心澄), and Gao Hong-Jun(高鸿钧). Thermoelectric-transport in metal/graphene/metal hetero-structure[J]. Chin. Phys. B, 2010, 19(3): 37202-037202.

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