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← ScienceWhich mechanism fundamentally limits carrier mobility in semiconductors?
A)Phonon scattering increases electrical resistivity✓
B)Avalanche breakdown generates excess current
C)Quantum tunneling causes drain leakage
D)Electromigration introduces metallic vacancies
💡 Explanation
Phonon scattering limits carrier mobility as thermal vibrations disrupt electron movement; this introduces electrical resistivity because electrons collide with vibrating atoms; therefore, mobility decreases, rather than breakdown which is voltage-driven, or tunneling due to thin oxides.
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