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← ScienceWhich mechanism causes negative differential resistance in tunnel diodes?
A)Quantum tunneling dominates carrier transport✓
B)Thermal scattering prevents carrier flow
C)Crystal defects induce carrier localization
D)Surface recombination reduces conductivity
💡 Explanation
Quantum tunneling allows electrons to pass through the potential barrier, because, at higher voltages, fewer electrons can tunnel as states align poorly; therefore, current decreases, rather than increases like Ohmic materials.
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