Tunneling conductance of amine linked alkyl chains

Abstract

The tunneling transport theory developed in Phys. Rev. B {\bf 76}, 115102 (2007) is applied to molecular devices made of alkyl chains linked to gold electrodes via amine groups. Using the analytic expression of the tunneling conductance derived in our previous work, we identify the key physical quantities that characterize the conductance of these devices. By investigating the transport characteristics of three devices, containing 4, 6, and 8 methyl groups, we extract the dependence of the tunneling conductance on the chain's length, which is an exponential decay law in close agreement with recent experimental data.

6 pages, 6 figures; two references added in v2

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• Ab initio complex band structure of conjugated polymers: Effects of hydrid DFT and GW schemes
• Band Alignment in Molecular Devices: Influence of Anchoring Group and Metal Work Function
• Theory of tunneling transport in periodic chains
• Tunneling through Al/AlOx/Al junction: analytical models and first principles simulations
• Tunneling transport in devices with semiconducting leads
• A Computer Code for Topological Quantum Spin Systems over Triangulated Surfaces