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Controllable pi junction with magnetic nanostructures

T. Yamashita·S. Takahashi·S. Maekawa
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Abstract

We propose a novel Josephson device in which 0 and $π$ states are controlled by an electrical current. In this system, the $π$ state appears in a superconductor/normal metal/superconductor junction due to the non-local spin accumulation in the normal metal which is induced by spin injection from a ferromagnetic electrode. Our proposal offers not only new possibilities for application of superconducting spin-electronic devices but also the in-depth understanding of the spin-dependent phenomena in magnetic nanostructures.

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T. Yamashita, S. Takahashi, S. Maekawa. 2006-01-07. Controllable pi junction with magnetic nanostructures. https://doi.org/10.1103/physrevb.73.144517

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