Which phenomenon limits electron tunneling rate between quantum dots mimicking atomic orbitals in a transistor?

💡 Explanation

When electrons tunnel between quantum dots, Coulomb blockade occurs because the energy required to add another electron to a dot increases due to electrostatic repulsion, reducing the tunneling rate. Therefore Coulomb blockade limits tunneling, rather than phonon scattering, thermal expansion, or plasmon resonance which have different effects.

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