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Quantum interference structures in the conductance plateaus of gold nanojunctions

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arxiv cond-mat/0311038 v2 pith:DL5AHU5C submitted 2003-11-03 cond-mat.mes-hall

Quantum interference structures in the conductance plateaus of gold nanojunctions

classification cond-mat.mes-hall
keywords conductanceplateausatomicinterferencenanojunctionsquantumstructurealternated
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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The conductance of breaking metallic nanojunctions shows plateaus alternated with sudden jumps, corresponding to the stretching of stable atomic configurations and atomic rearrangements, respectively. We investigate the structure of the conductance plateaus both by measuring the voltage dependence of the plateaus' slope on individual junctions and by a detailed statistical analysis on a large amount of contacts. Though the atomic discreteness of the junction plays a fundamental role in the evolution of the conductance, we find that the fine structure of the conductance plateaus is determined by quantum interference phenomenon to a great extent.

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