Co-existence of the Meissner and vortex-state on a superconducting spherical shell

Details Co-existence of the Meissner and vortex-state on a superconducting spherical shell Co-existence of the Meissner and vortex-state on a superconducting spherical shell

2009-03-16

arxiv.org/abs/0903.2800v2

Phys. Rev. B 79, 134516 (2009)

Physics

Condensed Matter

Superconductivity

11 pages, 5 figures (higher res gif version of fig.5 included in archive)

Scientific paper

10.1103/PhysRevB.79.134516

We show that on superconducting spherical nanoshells, the co-existence of the Meissner state with a variety of vortex patterns drives the phase transition to higher magnetic fields. The spherical geometry leads to a Magnus-Lorentz force pushing the nucleating vortices and antivortices towards the poles, overcoming local pinning centers, preventing vortex-antivortex recombination and leading to the appearance of a Meissner belt around the sphere's equator. In sufficiently small and thin spherical shells paramagnetic vortex states can be stable, enabling spatial separation of freely moving shells with different radii and vorticity in an inhomogeneous external magnetic field.

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