Motion of a single superconducting vortex
O. B. Hyun, J. R. Clem, D. K. Finnemore
DOI 10.1103/PhysRevB.40.175 · Physical Review B
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Abstract
Procedures have been developed to trap a single quantized vortex in a superconducting thin film and systematically move it around under the influence of an applied Lorentz force. The location of the vortex is determined from the diffraction pattern of a Josephson junction formed by superconducting cross strips and a normal-metal barrier; the force is applied by a current in the superconducting film. Vortices move across the junction in a reproducible series of discrete steps, typically a few micrometers long. The elementary pinning force is found to be approximately 10−6 N/m in a Pb-Bi film and to vary as (1-t)3/2, where t is the reduced temperature. By controlling the pinning sites along a symmetry axis of the junction, one can perform rather simple read and write operations for logic elements.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Pb-Bi Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 7.25 | Pressure not reported | onset |
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