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High-conductance states of single benzenedithiol molecules
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View: Figures


Image of FIG. 1.
FIG. 1.

Transient conductance traces during the junction closures and corresponding conductance histograms. (a) Often, the conductance curves demonstrated exponential increase. Occasionally, however, clear conductance steps are observed at . (b) When the conductance range at the dark region illustrated in (a) is expanded, we can also find several conductance steps below . [(c) and (d)] The conductance histogram obtained at exhibiting two sets of peak structures at and .

Image of FIG. 2.
FIG. 2.

Conductance histograms in the regime obtained at 0.6, 0.8, and . The faint peaks in reflect a little chance for the states being formed at the bias. The peaks grow rapidly at and persist up to . At bias , however, the peak structure is significantly broadened perhaps due to the high-bias local heating of the molecular junctions that also causes conductance fluctuations, as depicted in (b).

Image of FIG. 3.
FIG. 3.

(a) appearance ratio at different biases. At low biases, indicating the states dominantly appear in the junction. In contrast, the becomes at suggesting that the states are more preferred than the states under high biases. (b) A typical curve obtained from a single bias sweep, which shows the transition at . The characteristic obtained from a single sweep accord quantitatively with that derived from the bias shifts of the histogram peaks.


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: High-conductance states of single benzenedithiol molecules