Josephson coupling through ferromagnetic heterojunctions with noncollinear magnetizations
| hal.structure.identifier | Department of Physics | |
| dc.contributor.author | PAJOVIC, Z. | |
| hal.structure.identifier | Department of Physics | |
| dc.contributor.author | BOZOVIC, M. | |
| hal.structure.identifier | Department of Physics | |
| dc.contributor.author | RADOVIC, Z. | |
| hal.structure.identifier | Centre de physique moléculaire optique et hertzienne [CPMOH] | |
| hal.structure.identifier | Institut universitaire de France [IUF] | |
| dc.contributor.author | BUZDIN, Alexandre I. | |
| hal.structure.identifier | Centre de physique moléculaire optique et hertzienne [CPMOH] | |
| dc.contributor.author | CAYSSOL, Jérôme | |
| dc.date.created | 2006-07-31 | |
| dc.date.issued | 2006 | |
| dc.identifier.issn | 1098-0121 | |
| dc.description.abstractEn | We study the Josephson effect in clean heterojunctions that consist of superconductors connected through two metallic ferromagnets with insulating interfaces. We solve the scattering problem based on the Bogoliubov--de Gennes equation for any relative orientation of in-plane magnetizations, arbitrary transparency of interfaces, and mismatch of Fermi wave vectors. Both spin singlet and triplet superconducting correlations are taken into account, and the Josephson current is calculated as a function of the ferromagnetic layers thicknesses and of the angle $\alpha$ between their magnetizations. We find that the critical Josephson current $I_c$ is a monotonic function of $\alpha$ when the junction is far enough from $0-\pi$ transitions. This holds when ferromagnets are relatively weak. For stronger ferromagnets, variation of $\alpha$ induces switching between 0 and $\pi$ states and $I_c(\alpha)$ is non-monotonic function, displaying characteristic dips at the transitions. However, the non-monotonicity is the effect of a weaker influence of the exchange potential in the case of non-parallel magnetizations. No substantial impact of spin-triplet superconducting correlations on the Josephson current has been found in the clean limit. Experimental control of the critical current and $0-\pi$ transitions by varying the angle between magnetizations is suggested. | |
| dc.language.iso | en | |
| dc.publisher | American Physical Society | |
| dc.title.en | Josephson coupling through ferromagnetic heterojunctions with noncollinear magnetizations | |
| dc.type | Article de revue | |
| dc.identifier.doi | 10.1103/PhysRevB.74.184509 | |
| dc.subject.hal | Physique [physics]/Matière Condensée [cond-mat]/Supraconductivité [cond-mat.supr-con] | |
| dc.identifier.arxiv | cond-mat/0605562 | |
| bordeaux.journal | Physical Review B: Condensed Matter and Materials Physics (1998-2015) | |
| bordeaux.page | 184509 (7) | |
| bordeaux.volume | 74 | |
| bordeaux.issue | 18 | |
| bordeaux.peerReviewed | oui | |
| hal.identifier | hal-00401028 | |
| hal.version | 1 | |
| hal.popular | non | |
| hal.audience | Internationale | |
| hal.origin.link | https://hal.archives-ouvertes.fr//hal-00401028v1 | |
| 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=2006&rft.volume=74&rft.issue=18&rft.spage=184509%20(7)&rft.epage=184509%20(7)&rft.eissn=1098-0121&rft.issn=1098-0121&rft.au=PAJOVIC,%20Z.&BOZOVIC,%20M.&RADOVIC,%20Z.&BUZDIN,%20Alexandre%20I.&CAYSSOL,%20J%C3%A9r%C3%B4me&rft.genre=article |
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