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Controllable pi junction with magnetic nanostructures

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arxiv cond-mat/0601132 v1 pith:K3JP6AYZ submitted 2006-01-07 cond-mat.supr-con cond-mat.mes-hall

T. Yamashita , S. Takahashi , S. Maekawa This is my paper
classification cond-mat.supr-concond-mat.mes-hall
keywords junctionmagneticmetalnanostructuresnormalspinsuperconductoraccumulation
verification ladder T0 review T1 audit T2 compute T3 formal
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abstract

We propose a novel Josephson device in which 0 and $\pi$ states are controlled by an electrical current. In this system, the $\pi$ 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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