Which mechanism enables electron tunneling between two quantum dots separated by insulating material within nanoelectronic device?

💡 Explanation

When quantum dots are closely spaced, the wave functions of electrons in each dot extend into the insulating barrier, causing electron tunneling because of this overlap and quantum mechanical penetration, allowing electrons to move between the dots. Therefore, wave function overlap extension explains the tunneling rather than Coulomb blockade, phonon assistance, or thermionic emission which require specific energetics or lack of direct coupling.

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