Superconducting spin currents

Lead Research Organisation: University of Bristol
Department Name: Physics

Abstract

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Publications

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Fritsch D (2015) Triplet superconductivity and proximity effect induced by Bloch and Néel domain walls in Superconductor Science and Technology

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Fritsch D (2014) Spin-flipping with Holmium: case study of proximity effect in superconductor/ferromagnet/superconductor heterostructures in Philosophical Magazine

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Fritsch D (2014) Proximity effect in superconductor/conical magnet heterostructures

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Fritsch D (2014) Proximity effect in superconductor/conical magnet heterostructures. in Journal of physics. Condensed matter : an Institute of Physics journal

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Fritsch D (2014) Proximity effect in superconductor/conical magnet/ferromagnet heterostructures in New Journal of Physics

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Fritsch D (2013) Proximity effect in superconductor/conical magnet/ferromagnet heterostructures

 
Description We calculated the superconducting proximity effect at interfaces and multilayer structures of superconductors and conical magnets. We confirmed that the non-colinear magnetism of the conical magnetic layers is an efficient converter of spin-singlet Cooper pairs into odd in time spin triplet pairing correlations. The results are consistent with experimental measurements by our project partners in Cambridge, and we were able to show that the conical magnetic structure of holmium is nearly optimal for spin-triplet pair generation.
Exploitation Route We have confirmed that a conical magnet provides an efficient spin triplet pairing generator at an interface. Future work could investigate whether this effect occurs in other types of non-colinear magnetic structures, such as Bloch domain walls. If so, then it may be possible to make an electronic Josephson device with a switching property depending upon the presence or absence of domain walls.
Sectors Electronics
URL http://www.bristol.ac.uk/physics/people/person/james-f-annett/overview.html