Cooper Pair Cotunneling in Single Charge Transistors with Dissipative Electromagnetic Environment
S. V. Lotkhov, S. A. Bogoslovsky, A. B. Zorin, J. Niemeyer
DOI 10.1103/PhysRevLett.91.197002 · Physical Review Letters
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Abstract
We observed current-voltage characteristics of superconducting single charge transistors with on-chip resistors of R∼RQ=h/4e2≈6.45 kΩ, which are explained in terms of Cooper pair cotunneling. Both the effective strength of Josephson coupling and the cotunneling current are modulated by the gate-induced charge on the transistor island. For increasing values of the resistance R we found the Cooper pair current at small transport voltages to be dramatically suppressed.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Al Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
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