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Which mechanism facilitates the persistent current flow below critical temperature in superconducting materials?

A)Cooper pair formation through phonon interaction
B)Increased lattice vibrations hinder electron flow
C)Electron scattering via grain boundary inclusions
D)Reduced electron-phonon coupling creates resistance

💡 Explanation

Cooper pair formation allows electron pairs to move without resistance, therefore current flows unimpeded because electron energy must equal the band gap rather than single electron behavior which generates impedance.

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