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Optically Activated Superconductivity in MgB2 via Electroluminescent GaP Inhomogeneous Phase.

Yao Qi1, Duo Chen1, Qingyu Hai1

  • 1Smart Materials Laboratory, Department of Applied Physics, Northwestern Polytechnical University, Xi'an 710129, China.

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Summary

Incorporating electroluminescent gallium phosphide (GaP) phases into magnesium diboride (MgB2) enhances its superconducting properties. This method boosts critical temperature and current density, offering a new way to tune superconductors.

Keywords:
MgB2critical current densityelectroluminescent inhomogeneous phaseelectron–phonon couplingflux pinningmulti-quantum-well particlessmart meta-superconductors

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Area of Science:

  • Condensed Matter Physics
  • Materials Science

Background:

  • Magnesium diboride (MgB2) is a superconductor with potential applications.
  • Tuning superconducting properties is crucial for technological advancement.

Purpose of the Study:

  • Investigate the effect of electroluminescent gallium phosphide (GaP) inhomogeneous phases on MgB2 properties.
  • Explore strategies for enhancing superconducting transition temperature (Tc) and critical current density (Jc).

Main Methods:

  • Incorporation of GaP electroluminescent inhomogeneous phases into MgB2.
  • Systematic investigation of structural, electrical, and magnetic properties.
  • Raman spectroscopy to analyze phonon modes and electron-phonon coupling.

Main Results:

  • Superconducting transition temperature (Tc) increased by up to 1.4 K with increasing GaP emission intensity.
  • Critical current density (Jc) increased by ~69% and irreversibility field (Hirr) by ~31.5%.
  • Observed correlation between Tc, electron-phonon coupling (λ), and GaP emission intensity.

Conclusions:

  • Electroluminescent inhomogeneous phases offer a novel method for tuning MgB2 superconductivity.
  • Luminescence-activated states likely play a role in modulating superconducting response.
  • Synergistic regulation of superconductors through inhomogeneous phases and excited states is feasible.