Observation of a parity oscillation in the conductance of atomic wires

Details Observation of a parity oscillation in the conductance of atomic wires Observation of a parity oscillation in the conductance of atomic wires

2003-03-03

arxiv.org/abs/cond-mat/0303039v2

Phys. Rev. Lett. 91, 076805 (2003)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Scientific paper

10.1103/PhysRevLett.91.076805

Using a scanning tunnel microscope or mechanically controlled break junctions, atomic contacts of Au, Pt and Ir are pulled to form chains of atoms. We have recorded traces of conductance during the pulling process and averaged these for a large amount of contacts. An oscillatory evolution of conductance is observed during the formation of the monoatomic chain suggesting a dependence on even or odd numbers of atoms forming the chain. This behaviour is not only present in the monovalent metal Au, as it has been previously predicted, but is also found in the other metals which form chains suggesting it to be a universal feature of atomic wires.

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