Noise cross-correlation and Cooper pair splitting efficiency in multi-teminal superconductor junctions
Abstract
We analyze the non-local shot noise in a multi-terminal junction formed by two Normal metal leads con- nected to one superconductor. Using the cross Fano factor and the shot noise, we calculate the efficiency of the Cooper pair splitting. The method is applied to d-wave and iron based superconductors. We de- termine that the contributions to the noise cross-correlation are due to crossed Andreev reflections (CAR), elastic cotunneling, quasiparticles transmission and local Andreev reflections. In the tunneling limit, the CAR contribute positively to the noise cross-correlation whereas the other processes contribute negatively. Depending on the pair potential symmetry, the CAR are the dominant processes, giving as a result a high efficiency for Cooper pair split. We propose the use of the Fano factor to test the efficiency of a Cooper pair splitter device.
Keywords
Cite
@article{arxiv.1704.08989,
title = {Noise cross-correlation and Cooper pair splitting efficiency in multi-teminal superconductor junctions},
author = {J. A. Celis Gil and S. Gomez P. and William J. Herrera},
journal= {arXiv preprint arXiv:1704.08989},
year = {2017}
}