Fluctuator in disordered metallic point contacts: a simulation approach

Details Fluctuator in disordered metallic point contacts: a simulation approach Fluctuator in disordered metallic point contacts: a simulation approach

1998-07-07

arxiv.org/abs/cond-mat/9807104v1

Physics

Condensed Matter

Disordered Systems and Neural Networks

8 pages, 9 figures, to be published in Journal of Physics: cond. Matt

Scientific paper

10.1088/0953-8984/10/36/013

Electron transport through amorphous monatomic metallic structures generated earlier by molecular dynamics simulations is studied numerically. The interference of electronic trajectories backscattered by the structural disorder probes the multistable structural relaxations responsible for low-frequency noise in real metallic contacts. The structure of these modes is visualized; the dependence of noise magnitude on size and structure of the modes is studied. The transition from multistable behaviour to a more complex one is observed for temperatures far below the melting temperature. The current fluctuations observed numerically resemble the complex behaviour reported earlier for current noise in small metallic structures at moderate temperatures.

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