A R Champagne

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We study electron transport through C(60) molecules in the Kondo regime using a mechanically controllable break junction. By varying the electrode spacing, we are able to change both the width and the height of the Kondo resonance, indicating modification of the Kondo temperature and the relative strength of coupling to the two electrodes. The linear(More)
The ability to make electrical contact to single molecules creates opportunities to examine fundamental processes governing electron flow on the smallest possible length scales. We report experiments in which we controllably stretched individual cobalt complexes having spin S = 1, while simultaneously measuring current flow through the molecule. The(More)
We use interlayer tunneling to study bilayer two-dimensional electron systems at ␯ T = 1 over a wide range of charge-density imbalance ⌬␯ = ␯ 1 − ␯ 2 between the two layers. We find that the strongly enhanced tunneling associated with the coherent excitonic ␯ T = 1 phase at small layer separation can survive at least up to an imbalance of ⌬␯ = 0.5, i.e., ͑␯(More)
We study the Josephson-like interlayer tunneling signature of the strongly correlated nuT=1 quantum Hall phase in bilayer two-dimensional electron systems as a function of the layer separation, temperature, and interlayer charge imbalance. Our results offer strong evidence that a finite temperature phase transition separates the interlayer coherent phase(More)
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