Tunneling conductance of amine linked alkyl chains

Details Tunneling conductance of amine linked alkyl chains Tunneling conductance of amine linked alkyl chains

2008-03-05

arxiv.org/abs/0803.0710v2

Nano Lett 8, 1771 (2008)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

6 pages, 6 figures; two references added in v2

Scientific paper

10.1021/nl8012133

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.

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