Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
2009-06-26
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
8 pages, 5 figures
Scientific paper
We study the influence of energy levels broadening and electron subsystem overheating in island electrode (cluster) on current-voltage characteristics of three-electrode structure. A calculation scheme for broadening effect in one-dimensional case is suggested. Estimation of broadening is performed for electron levels in disc-like and spherical gold clusters. Within the two-temperature model of metallic cluster and by using a size dependence of the Debye frequency the effective electron temperature as a function of bias voltage is found approximately. We suggest that the effects of broadening and electron overheating are responsible for the strong smoothing of current-voltage curves, which is observed experimentally at low temperatures in structures based on clusters consisting of accountable number of atoms.
Babich A. V.
Pogosov Valentin V.
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