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arXiv 1806.04539cond-mat.mes-hall
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具有长分子连接体的单分子结的热电效率

Thermoelectric efficiency of single-molecule junctions with long molecular linkers

Natalya A. Zimbovskaya

摘要:

我们报告的理论研究结果的热电效率的单分子结与长分子链接。该接头是模拟使用紧结合模型描述的相同的网站链。结果表明,热电优值ZT强烈依赖于桥的长度,被控制的线形的电子传输函数对应的HOMO/LUMO输运通道的隧道能量范围内。使用所采用的模型,我们证明,ZT可能会显着增加的链接器延长,和网关状态的桥梁(如果有的话)可能会显着影响长度依赖的ZT。分析了不同桥长下ZT的温度依赖性。结果表明,宽的最小值出现在ZT与温度曲线,其位置由桥长控制。

英文摘要:

We report results of theoretical studies of thermoelectric efficiency of single-molecule junctions with long molecular linkers. The linker is simulated by a chain of identical sites described using a tight-binding model. It is shown that thermoelectric figure of merit ZT strongly depends on the bridge length, being controlled by the lineshape of electron transmission function within the tunnel energy range corresponding to HOMO/LUMO transport channel. Using the adopted model we demonstrate that ZT may significantly increase as the linker lengthens, and that gateway states on the bridge (if any) may noticeably affect the length-dependent ZT. Temperature dependences of ZT for various bridge lengths are analyzed. It is shown that broad minima emerge in ZT versus temperature curves whose positions are controlled by the bridge lengths.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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