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Which mechanism limits electron mobility across grain boundaries?

A)Crystal lattice defect scattering
B)Increased phonon mode coupling
C)Reduced Fermi surface nesting
D)Enhanced electron-hole recombination

💡 Explanation

Increased grain boundaries cause crystal lattice defect scattering because electrons encounter disruptions, thereby limiting their movement; therefore, mobility declines due to interrupted trajectories, rather than altered vibration modes or recombination.

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