Volume 65, Number 5, March 2004
|Page(s)||699 - 704|
|Section||Condensed matter: electronic structure, electrical, magnetic, and optical properties|
|Published online||01 February 2004|
Principle of a variable capacitor based on Coulomb blockade of nanometric-size clusters
Unité mixte de Physique CNRS/THALES - Domaine de Corbeville 91404 Orsay Cedex, France and Université Paris-Sud - 91405 Orsay Cedex, France
Accepted: 4 December 2003
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.
PACS: 73.23.Hk – Coulomb blockade; single-electron tunneling / 84.32.Tt – Capacitors / 84.37.+q – Electric variable measurements (including voltage, current, resistance, capacitance, inductance, impedance, and admittance, etc.)
© EDP Sciences, 2004
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