Abstract
A formula is derived that relates the conductance of a normal-metal–superconductor (NS) junction to the single-electron transmission eigenvalues. The formula is applied to a quantum point contact (yielding conductance quantization at multiples of 4/h), to a quantum dot (yielding a non-Lorentzian conductance resonance), and to quantum interference effects in a disordered NS junction (enhanced weak-localization and reflectionless tunneling through a potential barrier).
- Received 8 September 1992
DOI:https://doi.org/10.1103/PhysRevB.46.12841
©1992 American Physical Society