Anomalous current-voltage characteristics of SFIFS Josephson junctions with weak ferromagnetic interlayers

Tairzhan Karabassov; Anastasia V. Guravova; Aleksei Yu. Kuzin; Elena A. Kazakova; Shiro Kawabata; Boris G. Lvov; Andrey S. Vasenko

doi:10.3762/bxiv.2019.140.v1

Anomalous current-voltage characteristics of SFIFS Josephson junctions with weak ferromagnetic interlayers

Tairzhan Karabassov ,
Anastasia V. Guravova ,
Aleksei Yu. Kuzin ,
Elena A. Kazakova ,
Shiro Kawabata ,
Boris G. Lvov and
Andrey S. Vasenko

Submitting author affiliation:

National Research University Higher School of Economics, Moscow, Russian Federation

Beilstein Arch. 2019, 2019140. https://doi.org/10.3762/bxiv.2019.140.v1

Published 07 Nov 2019

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Read the peer-reviewed version of this preprint: https://doi.org/10.3762/bjnano.11.19

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Show All Preprints Nanotechnology Organic chemistry Bioorganic chemistry / chemical biology Catalysis Chemical methods and reactions Flow and process chemistry Green and sustainable chemistry Materials chemistry Medicinal and pharmaceutical chemistry Nano- and molecular-scale electronics Nano-biomaterials and bioscience Nanomagnetics Nanomaterials, thin films and nanointerfaces Nanomedicine Nanometrology and nanomechanics Nano-optics Nanopatterning, self-assembly and nanofabrication Nanostructures for energy and sensing applications Natural products chemistry Organo main group chemistry Other nanotechnology (unclassified) Other organic chemistry (unclassified) Photochemistry and photovoltaics Physical organic chemistry Supramolecular chemistry

Abstract

We present a quantitative study of the current-voltage characteristics (CVC) of SFIFS Josephson junctions (S denotes bulk superconductor, F - metallic ferromagnet, I - insulating barrier) with weak ferromagnetic interlayers in the diffusive limit. The problem is solved in the framework of the nonlinear Usadel equations. We consider the case of a strong tunnel barrier such that the left SF and the right FS bilayers are decoupled. We calculate the density of states (DOS) in SF bilayers using a self-consistent numerical method. Then we obtain the CVC of corresponding SFIFS junctions, and discuss their properties for different set of parameters including the thicknesses of ferromagnetic layers, the exchange field, and the magnetic scattering time. We observe the anomalous nonmonotonic CVC behavior in case of weak ferromagnetic interlayers, which we ascribe by DOS energy dependencies in case of small exchange fields in F layers.

Keywords: Current-voltage characteristics, Josephson junctions, proximity effect, superconductivity, Superconductor/Ferromagnet hybrid nanostructures

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When a peer-reviewed version of this preprint is available, this information will be updated in the information box above. If no peer-reviewed version is available, please cite this preprint using the following information:

Karabassov, T.; Guravova, A. V.; Kuzin, A. Y.; Kazakova, E. A.; Kawabata, S.; Lvov, B. G.; Vasenko, A. S. Beilstein Arch. 2019, 2019140. doi:10.3762/bxiv.2019.140.v1

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© 2019 Karabassov et al.; licensee Beilstein-Institut.
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