Vortex states in superconducting rings

  title={Vortex states in superconducting rings},
  author={B. J. Baelus and François M. Peeters and Vitaly A. Schweigert},
  journal={Physical Review B},
The superconducting state of a thin superconducting disk with a hole is studied within the nonlinear Ginzburg-Landau theory in which the demagnetization effect is accurately taken into account. We find that the flux through the hole is not quantized, the superconducting state is stabilized with increasing size of the hole for fixed radius of the disk, and a transition to a multivortex state is found if the disk is sufficiently large. Breaking the circular symmetry through a non-central-location… 
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