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Superconducting SET with tunable electromagnetic environment

Michio Watanabe, Koji Ishibashi, Yoshinobu Aoyagi

cond-mat.mes-hallarXiv:cond-mat/0208354

Abstract

We have studied the environmental effect on superconducting single-electron transistors (S-SETs) by biasing S-SETs with arrays of small-capacitance dc SQUIDs, whose effective impedance can be varied in situ. As the zero-bias resistance of the arrays is increased, Coulomb blockade in the S-SET becomes sharper, and the gate-voltage dependence changes from e-periodic to 2e-periodic. The SQUID arrays could be used as on-chip noise filters.

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