2019/05/23 by T. Karabassov, Tairzhan Karabassov, V. S. Stolyarov +8
Mathematics · Physics and Astronomy · #Condensed matter physics #Ferromagnetism #Function (biology) #Mathematics #Multi-mode optical fiber #Optics #Physics #Physics of Superconductivity and Magnetism #Quantum and electron transport phenomena #Realization (probability) #Statistics #Superconductivity in MgB2 and Alloys #cond-mat.mes-hall #cond-mat.supr-con
paper · pdf · doi:10.1103/physrevb.100.104502
published as Phys. Rev. B 100, 104502 (2019)
arxiv created 2019/05/23 · openalex created_date 2019/05/29 · openalex publication_date 2019/09/03 · arxiv updated 2019/09/11 · openalex updated_date 2026/08/05
We investigate the behavior of the critical temperature Tc in superconductor/ferromagnet/superconductor (S/F/S) trilayers in the dirty limit as a function of the ferromagnetic layer thickness df and the S/F interface transparency. We perform Tc calculations using the general self-consistent multimode approach based on the Usadel equations in Matsubara Green's functions technique, and compare the results with the single-mode approximation, widely used in literature. Both methods produce similar results for sufficiently low interface transparency. For transparent interfaces, we obtain a qualitatively different Tc(df) behavior. Using the multimode approach, we observe multiple 0-\ensuremathπ transitions in critical temperature, which cannot be resolved by the single-mode approximation. We also calculate the critical S layer thickness at given df when an S/F/S trilayer still has a nonzero critical temperature. Finally, we establish the limits of applicability of the single-mode approximation.