Localization and Capacitance Fluctuations in Disordered Au Nano-junctions

Details Localization and Capacitance Fluctuations in Disordered Au Nano-junctions Localization and Capacitance Fluctuations in Disordered Au Nano-junctions

2004-02-02

arxiv.org/abs/cond-mat/0402057v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

20 pages 8 figures

Scientific paper

10.1103/PhysRevB.69.205405

Nano-junctions, containing atomic-scale gold contacts between strongly disordered leads, exhibit different transport properties at room temperature and at low temperature. At room temperature, the nano-junctions exhibit conductance quantization effects. At low temperatures, the contacts exhibit Coulomb-Blockade. We show that the differences between the room-temperature and low temperature properties arise from the localization of electronic states in the leads. The charging energy and capacitance of the nano-junctions exhibit strong fluctuations with applied magnetic field at low temperature, as predicted theoretically.

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