Nanometer-Scale Metallic Grains Connected with Atomic-Scale Conductors

Details Nanometer-Scale Metallic Grains Connected with Atomic-Scale Conductors Nanometer-Scale Metallic Grains Connected with Atomic-Scale Conductors

2002-10-28

arxiv.org/abs/cond-mat/0210620v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Submitted to Journal of Applied Physics

Scientific paper

10.1063/1.1554756

We describe a technique for connecting a nanometer-scale gold grain to leads by atomic-scale gold point contacts. These devices differ from previous metallic quantum dots in that the conducting channels are relatively well-transmitting. We investigate the dependence of the Coulomb blockade on contact resistance. The high-resistance devices display Coulomb blockade and the low-resistance devices display a zero-bias conductance dip, both in quantitative agreement with theory. We find that in the intermediate regime, where the sample resistance is close to $h/e^2$, the I-V curve displays a Coulomb staircase with symmetric contact capacitances.

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