In the present work, we theoretically study characteristics of the nonlinear Seebeck effect in a single-molecule junction with chain-like bridge of an arbitrary length. We have employed tight-binding models to compute the electron transmission through the system. We concentrate on the analysis of dependences of thermovoltage Vth and differential thermopower S on the bridge length. It is shown that Vth becomes stronger and S grows as the bridge lengthens. We discuss the effects of the bridge coupling to the electrodes and of specific characteristics of terminal sites on the bridge on the length-dependent Vth and S, which appear when the system operates beyond the linear response regime.
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Research Article| May 09 2017
Length-dependent Seebeck effect in single-molecule junctions beyond linear response regime
Natalya A. Zimbovskaya; Length-dependent Seebeck effect in single-molecule junctions beyond linear response regime. J. Chem. Phys. 14 May 2017; 146 (18): 184302. https://doi.org/10.1063/1.4983130
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