Motivated by the recent experimental realization of a quantum interference transistor based on the superconducting proximity effect, we here demonstrate that the inclusion of a textured ferromagnet both strongly enhances the flux sensitivity of such a device and additionally allows for singlet-triplet switching by tuning a bias voltage. This functionality makes explicit use of the induced spin-triplet correlations due to the magnetic texture. Whereas the existence of such triplet correlations is well-known, our finding demonstrates how spin-triplet superconductivity may be utilized for concrete technology, namely to improve the functionality of ultra-sensitive magnetometers.
@article{arxiv.1308.3230,
title = {Singlet-Triplet Superconducting Quantum Magnetometer},
author = {Mohammad Alidoust and Klaus Halterman and Jacob Linder},
journal= {arXiv preprint arXiv:1308.3230},
year = {2013}
}
Comments
5 pages, 3 figures. To Appear in Physical Review B