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Area of Science:

  • Superconductivity
  • Condensed Matter Physics
  • Quantum Optics

Background:

  • Artificial pinning centers enhance superconductor critical current via vortex trapping.
  • Spatially periodic pinning shows enhanced critical current when vortex configurations match pinning landscape.
  • Recent advances enable light-matter interactions for creating temporally periodic imprints on superconductors.

Purpose of the Study:

  • Investigate temporal matching phenomena in superconductors with dynamic pinning.
  • Explore the impact of stroboscopic commensurability between vortex motion and dynamic pinning frequencies.
  • Demonstrate tunable control over superconducting properties using dynamic pinning.

Main Methods:

  • Applying dynamic, temporally periodic pinning landscapes to superconductors.
  • Analyzing vortex motion under applied current and dynamic pinning frequencies.
  • Characterizing current-voltage (I-V) characteristics and Shapiro steps.

Main Results:

  • Observed temporal matching resonances due to stroboscopic commensurability.
  • Matching resonances persist across broad parameter spaces (magnetic field, current, purity).
  • Demonstrated externally tunable resistance/impedance and Shapiro steps.

Conclusions:

  • Dynamic pinning offers a novel method for controlling vortex dynamics in superconductors.
  • Temporal matching phenomena provide tunable functionalities like variable resistance and Shapiro steps.
  • Findings open avenues for advanced superconductor applications using dynamic excitations.