PMID: 15245053Jul 13, 2004Paper

Half-integer Shapiro steps at the 0-pi crossover of a ferromagnetic Josephson junction

Physical Review Letters
Hermann SellierRoberto Calemczuk

Abstract

We investigate the current-phase relation of S/F/S junctions near the crossover between the 0 and the pi ground states. We use Nb/CuNi/Nb junctions where this crossover is driven both by thickness and temperature. For a certain thickness a nonzero minimum of critical current is observed at the crossover temperature. We analyze this residual supercurrent by applying a high frequency excitation and observe the formation of half-integer Shapiro steps. We attribute these fractional steps to a doubling of the Josephson frequency due to a sin((2phi) current-phase relation. This phase dependence is explained by the splitting of the energy levels in the ferromagnetic exchange field.

References

Apr 6, 2001·Physical Review Letters·V V RyazanovJ Aarts
Nov 3, 2001·Physical Review Letters·P DubosB Pannetier
Sep 13, 2002·Physical Review Letters·T KontosR Boursier
May 7, 2003·Physical Review Letters·W GuichardP Gandit

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Citations

Feb 19, 2014·Nature Communications·Avradeep PalM G Blamire
Jan 25, 2013·The Journal of Chemical Physics·Cang-Long WangLei Yang
Sep 29, 2012·Scientific Reports·J W A RobinsonM G Blamire
May 15, 2018·Physical Review Letters·W YuF Zhang
Dec 9, 2017·Physical Review Letters·Kun ZuoSergey M Frolov
Nov 10, 2018·Physical Review Letters·M J A StoutimoreD J Van Harlingen
Mar 15, 2015·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·Li-Ping JiaLei Yang
Apr 16, 2020·Physical Review. E·Petar MaliMilica Pavkov-Hrvojević
Sep 24, 2015·Reports on Progress in Physics·Matthias Eschrig
Dec 31, 2005·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·Bambi Hu, Jasmina Tekić
Feb 23, 2020·Beilstein Journal of Nanotechnology·Tairzhan KarabassovAndrey S Vasenko
Jul 7, 2011·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·Jasmina Tekić, Zoran Ivić
Jun 12, 2013·Physical Review Letters·Caroline RichardJulia S Meyer
Mar 5, 2009·Physical Review Letters·F Konschelle, A Buzdin
Apr 28, 2009·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·Jasmina TekićBambi Hu
Aug 7, 2007·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·Bambi Hu, Jasmina Tekić
Dec 12, 2012·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·Petar MaliMilan Pantić
Feb 1, 2008·Physical Review Letters·Munehiro NishidaNoriyuki Hatakenaka
Aug 27, 2011·Physical Review Letters·Luka Trifunovic
Feb 7, 2007·Physical Review Letters·M WeidesE Goldobin
Jun 12, 2021·Nano Letters·Taras GolodVladimir M Krasnov

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