Flux flow and vortex tunneling in two-dimensional arrays of small Josephson junctions
C. D. Chen, P. Delsing, D. B. Haviland, Y. Harada, T. Claeson
DOI 10.1103/PhysRevB.54.9449 · Physical Review B
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Abstract
We have measured the temperature dependence and magnetic field dependence of the zero-bias resistance (R0) as well as the current-voltage (I-V) characteristics for several two-dimensional arrays of small aluminum Josephson junctions. R0(T) decreases with decreasing temperature, which can be described in terms of two types of vortex motion: flux, flow, and vortex tunneling. At temperatures higher than the Kosterlitz-Thouless transition temperature (T>Tc) or at a bias current greater than the current corresponding to the onset of the nonlinear I-V characteristics (I>Id), the effective damping resistance which characterizes flux-flow motion is found to be approximately equal to the junction normal-state resistance RN. At low temperatures and at small bias current, R0 is temperature independent and remains finite down to our minimum attainable temperature. This finite resistance is found to be dependent on the array size as well as the junction parameters. © 1996 The American Physical Society.
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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