First order 0-pi phase transitions in superconductor/ferromagnet/superconductor trilayers
| hal.structure.identifier | Institute for Physics of Microstructures of the RAS | |
| hal.structure.identifier | Lobachevsky State University of Nizhny Novgorod | |
| dc.contributor.author | SAMOKHVALOV, A. V. | |
| hal.structure.identifier | Institut universitaire de France [IUF] | |
| hal.structure.identifier | Laboratoire Ondes et Matière d'Aquitaine [LOMA] | |
| dc.contributor.author | BUZDIN, Alexandre I. | |
| dc.date.created | 2015-06-10 | |
| dc.date.issued | 2015-08-24 | |
| dc.identifier.issn | 1098-0121 | |
| dc.description.abstractEn | We study the thermodynamics of the diffusive SFS trilayer composed of thin superconductor (S) and ferromagnet (F) layers. On the basis the self-consistent solutions of nonlinear Usadel equations in the F and S layers we obtain the Ginzburg--Landau expansion and compute the condensation free energy and entropy of the $0$ (even) and $\pi$ (odd) order parameter configurations. The first order $0-\pi$ transition as a function of temperature $T$ occurs, which is responsible for a jump of the averaged magnetic field penetration depth $\lambda(T)$ recently observed on experiments [N.Pompeo, et. al., Phys. Rev. B 90, 064510 (2014)]. The generalized Ginzburg-Landau functional was proposed to describe SFS trilayer for arbitrary phase difference between the superconducting order parameters in the S layers. The temperature dependence of the SFS Josephson junction critical current demonstrates the strong anharmonicity of the corresponding current--phase relation in the vicinity of the $0-\pi$ transition. In rf SQUID, coexistence of stable and metastable $0$ and $\pi$ states provides integer and half--integer fluxoid configurations. | |
| dc.description.sponsorship | Etats de Majorana et d'Andreev dans des circuits hybrides combinant des matériaux magnétiques et supraconducteurs - ANR-12-BS04-0016 | |
| dc.language.iso | en | |
| dc.publisher | American Physical Society | |
| dc.rights.uri | http://creativecommons.org/licenses/by-sa/ | |
| dc.subject.en | Proximity effects - Andreev reflection - SN and SNS junctions | |
| dc.subject.en | Mesoscopic and nanoscale systems | |
| dc.subject.en | Superconducting films and low-dimensional structures | |
| dc.title.en | First order 0-pi phase transitions in superconductor/ferromagnet/superconductor trilayers | |
| dc.type | Article de revue | |
| dc.identifier.doi | 10.1103/PhysRevB.92.054511 | |
| dc.subject.hal | Physique [physics]/Matière Condensée [cond-mat]/Supraconductivité [cond-mat.supr-con] | |
| dc.identifier.arxiv | 1509.02330 | |
| bordeaux.journal | Physical Review B: Condensed Matter and Materials Physics (1998-2015) | |
| bordeaux.page | 054511 (1-11) | |
| bordeaux.volume | 92 | |
| bordeaux.issue | 5 | |
| bordeaux.peerReviewed | oui | |
| hal.identifier | hal-01216388 | |
| hal.version | 1 | |
| hal.origin.link | https://hal.archives-ouvertes.fr//hal-01216388v1 | |
| bordeaux.COinS | ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Physical%20Review%20B:%20Condensed%20Matter%20and%20Materials%20Physics%20(1998-2015)&rft.date=2015-08-24&rft.volume=92&rft.issue=5&rft.spage=054511%20(1-11)&rft.epage=054511%20(1-11)&rft.eissn=1098-0121&rft.issn=1098-0121&rft.au=SAMOKHVALOV,%20A.%20V.&BUZDIN,%20Alexandre%20I.&rft.genre=article |
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