Abstract
A study of the sensitivity of the electrical conductance to the phase of the superconducting order parameters in mesoscopic andreev interfer- ometers in the presence of ferromagnetism is presented. The 2-probe con- ductance is calculated within the multiple-scattering approach using an efficient recursive Green’s function technique to solve the Bogoliubov—de Gennes equation on a tight binding lattice. It is shown that the well-known oscillations in amplitude of conductance of the normal interferometer are suppressed by the introduction of a magnetic exchange field and are killed when the magnetic length of the system is of order the separation between the two superconducting islands. However, this suppression occurs in a non- monotonic fashion:- we show that the zero phase extremum in conductance oscillates periodically as one varies the exchange field.
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Newman, C., Lambert, C.J., Leadbeater, M. (2002). Conductance Oscillations in Ferromagnetic andreev Interferometers. In: Graja, A., Bułka, B.R., Kajzar, F. (eds) Molecular Low Dimensional and Nanostructured Materials for Advanced Applications. NATO Science Series, vol 59. Springer, Dordrecht. https://doi.org/10.1007/978-94-010-0349-0_9
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DOI: https://doi.org/10.1007/978-94-010-0349-0_9
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