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← ScienceWhich mechanism limits electron transport in nanoscale semiconductor devices due to quantum effects?
A)Quantum tunneling through potential barriers✓
B)Increased phonon scattering at interfaces
C)Surface recombination dominating bulk current
D)Ohmic contact resistance becoming significant
💡 Explanation
When semiconductor devices shrink to nanoscale, quantum tunneling through potential barriers becomes significant because electrons can bypass the classically forbidden regions, leading to current leakage. Therefore tunneling limits electron transport, rather than phonon scattering, or surface recombination, or contact resistance which are prevalent under different conditions.
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