Dynamics of vortex shells in mesoscopic superconducting Corbino disks
V. R. Misko, F. M. Peeters
DOI 10.1103/PhysRevB.74.174507 · Physical Review B
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Abstract
In mesoscopic superconducting disks vortices form shell structures as recently observed in Nb disks. We study the dynamics of such vortices, driven by an external current I0, in a Corbino setup. At very low I0, the system exhibits rigid-body rotation while at some critical current Ic,i vortex shells rotate separately with angular velocities ωi. This critical current Ic,i has a remarkable nonmonotonous dependence on the applied magnetic field which is due to a dynamically induced structural transition with a rearrangement of vortices over the shells similar to the Coster-Kronig transition in hollow atoms. Thermally activated externally driven flux motion in a disk with pinning centers explains experimentally observed ωi as a function of I0 and T and the dynamically induced melting transition.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Nb 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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