Phase Conjugated Andreev Backscattering in Two-Dimensional Ballistic Cavities

A. F. Morpurgo; S. Holl; B. J. van Wees; T. M. Klapwijk; G. Borghs

doi:10.1103/PhysRevLett.78.2636

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Phase Conjugated Andreev Backscattering in Two-Dimensional Ballistic Cavities

A. F. Morpurgo, S. Holl, B. J. van Wees, T. M. Klapwijk, G. Borghs

DOI 10.1103/PhysRevLett.78.2636 · Physical Review Letters

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Abstract

We have experimentally investigated transport in two-dimensional ballistic cavities connected to a point contact and to two superconducting electrodes with a tunable macroscopic phase difference. The point contact resistance oscillates as a function of the phase difference in a way which reflects the ballistic nature of the transport in the cavity. We interpret our results in terms of a semiclassical model that relies on the properties of the phase conjugated trajectories on which a hole traces the path of the electron back to the emitting point contact. This model provides quantitative predictions (with no fitting parameters) as well as a clear physical picture.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
Nb Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	6.5	Pressure not reported	unknown