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

Autor: Niu Qian, Gao Min, Xie Xin-Cheng, Du Shi-Xuan, Sun Qing-Feng, Cai Jin-Ming, Pan Yi, Gao Hong-Jun, Hu Hao, Zhang Chen-Dong
Rok vydání: 2010
Předmět:
Zdroj: Chinese Physics B. 19:037202
ISSN: 1674-1056
DOI: 10.1088/1674-1056/19/3/037202
Popis: 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.
Databáze: OpenAIRE