Influence of Quantum Interference on the Thermoelectric Properties of Molecular Junctions

Research output: Contribution to journalArticle


title = "Influence of Quantum Interference on the Thermoelectric Properties of Molecular Junctions",
abstract = "Molecular junctions offer unique opportunities for controlling charge transport on the atomic scale and for studying energy conversion. For example, quantum interference effects in molecular junctions have been proposed as an avenue for highly efficient thermoelectric power conversion at room temperature. Toward this goal, we investigated the effect of quantum interference on the thermoelectric properties of molecular junctions. Specifically, we employed oligo(phenylene ethynylene) (OPE) derivatives with a para-connected central phenyl ring (para-OPE3) and meta-connected central ring (meta-OPE3), which both covalently bind to gold via sulfur anchoring atoms located at their ends. In agreement with predictions from ab initio modeling, our experiments on both single molecules and monolayers show that meta-OPE3 junctions, which are expected to exhibit destructive interference effects, yield a higher thermopower (with ∼20 μV/K) compared with para-OPE3 (with ∼10 μV/K). Our results show that quantum interference effects can indeed be employed to enhance the thermoelectric properties of molecular junctions.",
keywords = "density functional theory, Molecular junctions, quantum interference, quantum transport, thermoelectricity, thermopower",
author = "Ruijiao Miao and Hailiang Xu and Maxim Skripnik and Longji Cui and Kun Wang and Pedersen, {Kim G.L.} and Martin Leijnse and Fabian Pauly and Kenneth W{\"a}rnmark and Edgar Meyhofer and Pramod Reddy and Heiner Linke",
year = "2018",
month = "9",
day = "12",
doi = "10.1021/acs.nanolett.8b02207",
language = "English",
volume = "18",
pages = "5666--5672",
journal = "Nano Letters",
issn = "1530-6992",
publisher = "The American Chemical Society (ACS)",
number = "9",