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Influence du spectre électronique et de l'effet paramagnétique sur les propriétés des hétérostructures supraconductrices.

Abstract : The atomic-scaled heterostructures with superconducting and ferromagnetic materials exhibit astonishing properties. For example, the proximity effect in the F/S/F sandwiches leads to the spin-valve effect. In the S/F/S junctions, one can observe 0-p phase transiton. These effects depend on the ferromagnetic properties. In the first part, we study the influence of energy shift and effective mass difference to explain the inverse spin valve effect. We also study the 0-p phase diagram and its dependence on the energy shifts and anisotropic sprectra in S/F/S junctions. The second part is devoted to the study of paramagnetic effet on the (H,T) phase diagram of the S/N and S/S bilayers. We demonstrate the formation of a superconducting field induced phase for high magnetic fields and low temperature. Calculated in presence of the superconducting inhomogeneous Fulde-Ferrell-Larkin- Ovchinikov (FFLO) state, we study the influence of the impurities on this new superconducting phase. The last part deals with the study of superconducting-normal metal(N) multilayers. We calculate the influence of the number of layers and energy shift on the density of state, the thermodyna
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Contributor : Xavier Montiel <>
Submitted on : Wednesday, January 18, 2012 - 11:15:28 AM
Last modification on : Thursday, January 11, 2018 - 6:23:22 AM
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Xavier Montiel. Influence du spectre électronique et de l'effet paramagnétique sur les propriétés des hétérostructures supraconductrices.. Supraconductivité [cond-mat.supr-con]. Université Sciences et Technologies - Bordeaux I, 2011. Français. ⟨tel-00660954⟩

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