Length-dependent thermopower of single-molecule junctions

Abstract

In the present work we theoretically study the length dependence of thermopower of a single-molecule junction with a chain-like molecular bridge of an arbitrary length using a tight-binding model. We analyze conditions bringing a nonlinear growth of the thermopower accompanying the extension of the bridge length. Also, we show that the thermopower may decrease with increasing molecular length provided that the molecular bridge is sufficiently long.

4 pages, 3 figures, Accepted in J. Chem. Phys

References in corpus (11)

• Energy Dissipation and Transport in Nanoscale Devices
• Thermoelectric energy harvesting with quantum dots
• Giant thermopower and figure of merit in single-molecule devices
• Optimal thermoelectric figure of merit of a molecular junction
• Violation of the Wiedemann-Franz Law in a Single-Electron Transistor
• Resonant Electron Transport in Single-Molecule Junctions: Vibrational Excitation, Rectification, Negative Differential Resistance and Local Cooling
• Length-dependent conductance and thermopower in single-molecule junctions of dithiolated oligophenylene derivatives
• Inelastic effects in molecular junction transport: Scattering and self-consistent calculations for the Seebeck coefficient
• Electron transfer across a thermal gradient
• Ab-initio study of the thermopower of biphenyl-based single-molecule junctions
• Thermoelectric transport properties of a T-shaped double quantum dot system in the Coulomb blockade regime