Principle of a variable capacitor based on Coulomb blockade of nanometric-size clusters
Résumé
We show how Coulomb blockade of electrons in a dispersive set of clusters
embedded in the dielectric of a capacitor can be used to design a voltage tunable variable
capacitor (varactor). We calculate the variation of capacitance for typical size distribution of
the clusters and as a function of the dielectric constants of the insulators. We also discuss the
temperature and frequency dependence of the capacitor.
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