Which mechanism allows an electron to tunnel through a potential energy barrier in a quantum dot transistor?

💡 Explanation

When an electron encounters a potential barrier, wave function penetration allows it to tunnel through because the wave function has a non-zero probability of existing within the barrier, resulting in a probability of transmission. Therefore, wave function penetration occurs, rather than thermal excitation, resonant frequency absorption, or magnetic field reduction, which depend on energy fluctuations or external field effects.

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