Seebeck effects in a graphene nanoribbon coupled to two ferromagnetic leads
Seebeck effects in a graphene nanoribbon coupled to two ferromagnetic leads
复制标题
与两个铁磁引线耦合的石墨烯纳米带中的塞贝克效应
DOI：
10.1063/1.4868322
复制
发表时间：
2014-03
影响因子：
3.2
通讯作者：
Tao Ouyang
中科院分区：
文献类型：
--
作者：
Benliang Zhou;Yangsu Zeng;Guanghui Zhou;Tao Ouyang
我们从理论上研究了两个磁矩非共线的铁磁（FM）电极之间的窄石墨烯纳米颗粒系统的塞贝克效应。已经考虑了扶手椅边缘石墨烯纳米带（ZGNRs）和扶手椅边缘石墨烯纳米带（AGNRs）两者。利用非平衡绿色函数方法结合紧束缚哈密顿量，证明了在无磁场时，Seebeck系数对纳米尺度的手征性和宽度敏感.与22-ZGNR和金属17-AGNR体系相比，半导体15-AGNR体系具有上级的热电性能，其塞贝克系数可提高两个数量级。同时，22-ZGNR和金属17-AGNR体系的Seebeck系数与石墨烯体系的Seebeck系数在同一数量级。此外，塞贝克系数强烈依赖于两个FM引线的磁化强度M以及磁配置。尤其是，T...
We theoretically investigate the Seebeck effects for the system of a narrow graphene nanoribbon between two ferromagnetic (FM) electrodes with noncollinear magnetic moments. Both zigzag-edge graphene nanoribbons (ZGNRs) and armchair-edge graphene nanoribbons (AGNRs) have been considered. By using the nonequilibrium Green's function method combining with the tight-binding Hamiltonian, it is demonstrated that, the Seebeck coefficients are sensitive to the chirality and width of the nanoribbon in the absence of magnetic field. Compared with 22-ZGNR and metallic 17-AGNR systems, semiconducting 15-AGNR system is found to posses superior thermoelectric performance, its Seebeck coefficients can be improved by two orders of magnitude. Meanwhile, the Seebeck coefficients for both 22-ZGNR and metallic 17-AGNR systems are the same order as that of graphene system. Furthermore, the Seebeck coefficients are strongly dependent on the magnetization M as well as magnetic configuration of the two FM leads. Particularly, t...
登录
查看更多内容
DOI：
10.1088/0953-8984/22/3/035301
发表时间：
2010-01
期刊：
Journal of Physics: Condensed Matter
影响因子：
--
作者：
Jiang-chai Chen;Shu-guang Cheng;S. Shen;Qing Sun
通讯作者：
Jiang-chai Chen;Shu-guang Cheng;S. Shen;Qing Sun
影响因子：
4
作者：
H. Zheng;H. J. Liu;X. Tan;H. Lv;L. Pan;J. Shi;X. Tang
通讯作者：
H. Zheng;H. J. Liu;X. Tan;H. Lv;L. Pan;J. Shi;X. Tang
影响因子：
3.2
作者：
Karamitaheri, Hossein;Neophytou, Neophytos;Kosina, Hans
通讯作者：
Kosina, Hans
影响因子：
4
作者：
Ouyang, Yijian;Guo, Jing
通讯作者：
Guo, Jing
影响因子：
8.6
作者：
Wei, Peng;Bao, Wenzhong;Shi, Jing
通讯作者：
Shi, Jing