Measurements of charge soliton motion in two-dimensional arrays of ultrasmall Josephson junctions
T. S. Tighe, M. T. Tuominen, J. M. Hergenrother, M. Tinkham
DOI 10.1103/PhysRevB.47.1145 · Physical Review B
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Abstract
We have measured two-dimensional arrays of Josephson junctions where the charging energy Ec dominates the Josephson coupling energy EJ by as much as a factor of 33. In this system, an added charge polarizes neighboring islands, creating a soliton. Instead of the predicted Kosterlitz-Thouless-Berezinskii phase transition for unbinding soliton-antisoliton pairs, we find that our linear conductance data are better described by a simple Arrhenius form, with an activation energy of ∼0.23Ec in the normal state and ∼0.23Ec plus the superconducting energy gap in the superconducting state.
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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