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Phase slip phenomena in superconductors: from ordered to chaotic dynamics.
1Jozef Stefan Institute, Jamova 39, 1001 Ljubljana, Slovenia.
Physical Review Letters
|January 15, 2011
Summary
Flux penetration into superconducting cylinders transitions from deterministic to stochastic dynamics at high magnetic fields. Cylinder inhomogeneity surprisingly reduces stochasticity due to Kelvin-Helmholtz vortices.
Area of Science:
- Condensed matter physics
- Superconductivity
- Vortex dynamics
Background:
- Flux penetration in superconductors is crucial for understanding their electromagnetic properties.
- The behavior of magnetic flux in superconducting geometries under varying fields is complex.
- Vortex dynamics significantly influence the response of superconductors to magnetic fields.
Purpose of the Study:
- To investigate the kinetics of flux penetration in a 2D superconducting cylinder.
- To analyze the transition from deterministic to stochastic dynamics with increasing magnetic field.
- To explore the impact of cylinder inhomogeneity on flux penetration dynamics.
Main Methods:
- Theoretical modeling of flux penetration in a 2D superconducting cylinder.
- Analysis of system behavior in low and strong magnetic field limits.
- Investigation of the role of Kelvin-Helmholtz vortices in influencing stochasticity.
Main Results:
- In the low magnetic field limit, flux penetration kinetics are deterministic.
- In the strong magnetic field limit, the dynamics become stochastic.
- Cylinder inhomogeneity was found to reduce the level of stochasticity, contrary to initial expectations.
Conclusions:
- The study reveals a field-dependent transition in flux penetration dynamics for superconducting cylinders.
- Kelvin-Helmholtz vortices play a critical role in mitigating stochasticity in inhomogeneous cylinders.
- These findings offer new insights into the complex behavior of superconductors under magnetic fields.
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