Coulomb blockade

A Coulomb blockade will also be observed when making the device very small (like a quantum dot). When the device is small enough, electrons inside the device will create a strong coulomb repulsion preventing other electrons to flow. The device will no longer follow Ohm's law. The current-voltage relation of the coulomb blockade looks like a staircase.

Coulomb blockade

A Coulomb blockade will also be observed when making the device very small (like a quantum dot). When the device is small enough, electrons inside the device will create a strong coulomb repulsion preventing other electrons to flow. The device will no longer follow Ohm's law. The current-voltage relation of the coulomb blockade looks like a staircase.