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Nucleation of superconductivity in mesoscopic star-shaped superconductors

  • D. A. Dikin
  • V. Chandrasekhar
  • V. R. Misko
  • V. M. Fomin
  • J. T. DevreeseEmail author
Original Paper

Abstract.

We study the phase transition of a star-shaped superconductor, which covers smoothly the range from zero to two dimensions with respect to the superconducting coherence length \(\xi (T)\). Detailed measurements and numerical calculations show that the nucleation of superconductivity in this device is very inhomogeneous: the superconducting order parameter is strongly enhanced and mostly robust in regions close to multiple boundaries. The strong inhomogeneity of the order parameter results in a rich structure of the superconducting transition as a function of temperature and magnetic field.

Keywords

Magnetic Field Phase Transition Coherence Numerical Calculation Coherence Length 
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Copyright information

© Springer-Verlag Berlin/Heidelberg 2003

Authors and Affiliations

  • D. A. Dikin
    • 1
  • V. Chandrasekhar
    • 1
  • V. R. Misko
    • 2
  • V. M. Fomin
    • 2
  • J. T. Devreese
    • 2
    Email author
  1. 1.Department of Physics and AstronomyNorthwestern UniversityEvanstonUSA
  2. 2.Theoretische Fysica van de Vaste StoffenUniversiteit Antwerpen (UIA)AntwerpenBelgium

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