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Thermoelectric power and electrical conductance of DNA based molecular junctions

机译:基于DNA的分子连接的热电功率和电导率

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摘要

The thermoelectric performance of short oligonucleotides connected in between metallic contacts at different temperatures is theoretically studied on the basis of a model Hamiltonian. The obtained analytical expressions reveal the existence of important resonance effects leading to a significant enhancement of both the electrical conductance and thermoelectric power in the case of trimer codons. On the other hand, dimerization effects lead to a conductance degradation accompanied by a slight thermopower enhancement in the case of dinucleotides. The potential of metal-nucleobase-metal junctions for thermoelectric applications is discussed by considering different design parameters, including the Fermi level position and the molecule-lead coupling strength value.
机译:理论上基于汉密尔顿模型研究了在不同温度下连接在金属触点之间的短寡核苷酸的热电性能。所获得的分析表达式表明,在三聚体密码子的情况下,存在重要的共振效应,从而导致电导率和热电功率的显着提高。另一方面,在二核苷酸的情况下,二聚作用导致电导降低,并伴随着轻微的热功率增强。通过考虑不同的设计参数,包括费米能级位置和分子-铅偶联强度值,讨论了热电应用中金属-核碱基-金属结的潜力。

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