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← ScienceWhich outcome occurs when a substitutional impurity disrupts a semiconductor's lattice periodicity?
A)Increased electron-phonon scattering✓
B)Enhanced intrinsic carrier concentration
C)Reduced thermal conductivity
D)Elevated Debye Temperature
💡 Explanation
Increased electron-phonon scattering occurs due to the disruption of periodic potential which perturbs electron waves. This changes the effective mass of electrons and increases electron-phonon scattering because crystal momentum is no longer a good quantum number; therefore scattering increases, rather than a change to intrinsic material conductivity under different conditions.
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