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Which outcome results when crystal lattice imperfections disrupt electron bands?

A)Reduced carrier mobility reduces conductivity
B)Increased phonon scattering enhances superconductivity
C)Enhanced electron tunneling betters insulation
D)Increased band overlap eliminates bandgap

💡 Explanation

Reduced carrier mobility lowers conductivity because imperfections scatter with drifting electrons due to Bloch waves diffraction (scattering mechanism), thus halting electron motion; therefore, reduced mobility lowers conductivity, rather than enhancing superconductivity or tunneling which require different mechanisms.

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