Giant thermopower and figure of merit in single-molecule devices
Giant thermopower and figure of merit in single-molecule devices
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DOI：
10.1103/physrevb.79.033405
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发表时间：
2009-01-01
影响因子：
3.7
通讯作者：
Lambert, C. J.
中科院分区：
文献类型：
--
作者：
Finch, C. M.;Garcia-Suarez, V. M.;Lambert, C. J.
我们对夹在金电极之间的分子的热电势 S 和无量纲品质因数 ZT 进行了研究。我们表明，对于具有侧基的分子，传输系数的形状可以通过费米能附近的法诺共振来显着改变，可以调整该共振以产生 S 和 ZT 的巨大增加。这表明表现出法诺共振的分子具有高热电冷却效率，而这对于沿其主链仅具有离域态的传统非门控分子来说是不存在的。
We present a study of the thermopower S and the dimensionless figure of merit ZT in molecules sandwiched between gold electrodes. We show that for molecules with side groups, the shape of the transmission coefficient can be dramatically modified by Fano resonances near the Fermi energy, which can be tuned to produce huge increases in S and ZT. This shows that molecules exhibiting Fano resonances have a high efficiency of thermoelectric cooling which is not present for conventional ungated molecules with only delocalized states along their backbone.