Abstract
A quantum theory of a degenerate p-n junction coupled to an external circuit shows that the combination of Coulomb blockade, and the intrinsic (constant–voltage bias) nonlinear I–V of the junction results in a new device with unique features. In the limit when the coulomb charging energy is larger than the energy width of the degeneracy on the P side, it is demonstrated that conduction is permitted in only one direction of voltage. It is also shown, that when the energy width of the degeneracy on the N side is much larger than that on the P side, then a controllable tunneling saturation current is possible.
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