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Which outcome occurs when a quantum well’s barrier thickness decreases to nanoscale dimensions?

A)Increased electron quantum tunneling probability
B)Reduced energy quantization within the well
C)Enhanced electron-phonon scattering rate
D)Suppressed exciton formation within the well

💡 Explanation

As the barrier thickness decreases, the wave function penetration through the barrier increases because of quantum tunneling, leading to a higher probability of electrons tunneling through it. Therefore increased tunneling probability results, rather than modified quantization, scattering, or exciton suppression which require different quantum conditions.

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