Final published version
Research output: Contribution to Journal/Magazine › Conference article › peer-review
<mark>Journal publication date</mark> | 1/01/1999 |
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<mark>Journal</mark> | Journal of Superconductivity |
Issue number | 6 |
Volume | 12 |
Number of pages | 9 |
Pages (from-to) | 747-755 |
Publication Status | Published |
<mark>Original language</mark> | English |
Event | Proceedings of the 1998 International Workshop on 'Macroscopic Quantum Tunneling and Coherence' - Naples, Italy Duration: 10/06/1998 → 13/06/1998 |
Conference | Proceedings of the 1998 International Workshop on 'Macroscopic Quantum Tunneling and Coherence' |
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Country/Territory | Italy |
City | Naples |
Period | 10/06/98 → 13/06/98 |
A superconducting transistor structure comprising two Josephson tunnel junctions connected in series and a small island in between, which is capacitively coupled to a gate, is considered. When self-capacitances of the junctions are sufficiently small that the corresponding charging energy Ec is of the order of magnitude of the Josephson coupling strength EJ (and both are ≫kBT), the interplay of the charging and Josephson effects in the circuit becomes essential. This leads to a characteristic I-V curve which can be effectively modulated by the gate in two limit cases of external electrodynamic impedance Zs(ω): (a) Zs = Rs ≫ RQ ≈ 6.5 kΩ and (b) Rs ≪ RQ. Both circuits can serve as electrometers which are competitive with traditional single-electron devices. Preliminary experimental results are discussed.