2003/08/31 by R. Mélin, D. Feinberg · 2 citations
Chemistry · Materials Science · Mathematics · Physics and Astronomy · #Antiparallel (mathematics) #Bilayer #Chemistry #Condensed matter physics #Ferromagnetism #Field (mathematics) #Iron-based superconductors research #Layer (electronics) #Magnetic field #Materials science #Mathematics #Nanotechnology #Physics #Physics of Superconductivity and Magnetism #Proximity effect (electron beam lithography) #Quantum mechanics #Superconductivity #Superconductivity in MgB2 and Alloys #cond-mat.mes-hall #cond-mat.supr-con
paper · pdf · doi:10.1209/epl/i2003-10051-1
published as Europhys. Lett. 65, 96 (2004) · 7 pages, 3 figures
arxiv created 2003/10/20 · openalex publication_date 2003/12/17 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
Based on the model of F/S/F trilayer with atomic thickness (see Buzdin A. and Daumens M., cond-mat/0305320, Europhys. Lett. , 64 (2003) 510) we discuss the relative roles of pair-breaking and proximity effects, as a function of the exchange field, of disorder and of a finite thickness in the superconducting layer. The exchange field can be small (weak ferromagnets) or large (strong ferromagnets) compared to the superconducting gap. With weak ferromagnets we show the existence of a re-entrant superconducting gap for the F/S/F trilayer with atomic thickness in the parallel alignment (equivalent to the F/S bilayer). Qualitatively small disorder is equivalent to reducing the value of the hopping parameters. In the presence of a finite thickness in the superconducting layer, the superconducting gap in the antiparallel alignment is larger than in the parallel alignment, meaning that pair breaking dominates over the proximity effect.