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• W2076147553 abstract "Structural disorder is present in almost all experimental measurements of electronic transport through single molecules or molecular wires. To assess its influence on the conductance is computationally demanding because a large number of conformations must be considered. Here we analyze an approximate recursive-layer Green's function approach for the ballistic transport through quasi-one-dimensional nanojunctions. We find a rapid convergence of the method with its control parameter, the layer thickness, and good agreement with existing experimental and theoretical data. Because the computational effort rises only linearly with system size, this method permits treatment of very large systems. We investigate the conductance of gold and silver wires of different sizes and conformations. For weak electrode disorder and imperfect coupling between electrode and wire we find conductance variations of approximately 20%. Overall we find the conductance of silver junctions well described by the immediate vicinity of narrowest point in the junction, a result that may explain the observation of well-conserved conductance plateaus in recent experiments on silver junctions. In an application to flexible oligophene wires, we find that strongly distorted conformations that are sterically forbidden at zero temperature, contribute significantly to the observed average zero-bias conductance of the molecular wire." @default.
• W2076147553 created "2016-06-24" @default.
• W2076147553 creator A5040901701 @default.
• W2076147553 creator A5078885958 @default.
• W2076147553 date "2009-07-27" @default.
• W2076147553 modified "2023-09-23" @default.
• W2076147553 title "Influence of structural disorder and large-scale geometric fluctuations on the coherent transport of metallic junctions and molecular wires" @default.
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• W2076147553 doi "https://doi.org/10.1103/physrevb.80.045424" @default.
• W2076147553 hasPublicationYear "2009" @default.
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