Europhys. Lett, 47 (1), pp. 97-103 (1999)
Accuracy of a mechanical single-electron shuttle
C. Weiss and W. Zwerger
Sektion Physik and Center for NanoScience,
Theresienstr. 37, D-80333 München, Germany
(received 12 March 1999; accepted 27 April 1999)
PACS. 73.23Hk - Coulomb blockade; single-electron tunnelling.
Motivated by recent experiments, we calculate both the average current and the current fluctuations for a metallic island which oscillates between two symmetric electrodes. Electrons can only tunnel on or off the island when it is close to one of the electrodes. Using a Master equation we investigate the accuracy of such an electron shuttle both analytically and numerically. It is shown that optimum operation is reached when the contact time is much larger than the RC-time.
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