Superconductivity and macroscopic quantum effects in superconducting/ferromagnetic hybrid nanostructures

Aprili, Marco and Kontos, Takis and Della Rocca, Maria-Luisa and Lesueur, Jérome and Guichard, Wiebke and Gandit, Philippe and Bauer, A. and Strunk, Christoph (2006) Superconductivity and macroscopic quantum effects in superconducting/ferromagnetic hybrid nanostructures. COMPTES RENDUS PHYSIQUE, 7 (1). pp. 116-127. ISSN 1631-0705,

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Abstract

Hybrid nanostructures not only open new routes for studying the coexistence of superconductivity and ferromagnetism, but they also provide new insights into the fundamentals of quantum electronics. We have investigated, by a series of experiments, the chan-e in the superconducting wavefunction resulting from the interaction between the spins of a Cooper pair and the exchange field. Tunneling spectroscopy reveals an inhomogeneous Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) superconducting state induced in a ferromagnetic thin film by the proximity effect. As a consequence, critical current and macroscopic quantum interference (SQUID) experiments show pi-coupling between two superconductors coupled through a ferromagnetic thin film. pi-coupling origmates a spontaneous half quantum flux in a superconducting ring. This phase transition has been observed by Josephson and Hall magnetometry. (c) 2006 Academie des sciences. Published by Elsevier SAS. All rights reserved.

Item Type: Article
Uncontrolled Keywords: MAGNETIC METALS; FERROMAGNET; STATE; superconductivity; Josephson effect; tunneling spectroscopy; quantum transport
Subjects: 500 Science > 530 Physics
Divisions: Physics > Institute of Experimental and Applied Physics > Chair Professor Weiss > Group Christoph Strunk
Depositing User: Dr. Gernot Deinzer
Date Deposited: 01 Mar 2021 11:04
Last Modified: 01 Mar 2021 11:04
URI: https://pred.uni-regensburg.de/id/eprint/35109

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