Direct Coupling Between Magnetism and Superconducting Current in the Josephson φ0 Junction

A. Buzdin

doi:10.1103/PhysRevLett.101.107005

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Direct Coupling Between Magnetism and Superconducting Current in the Josephson φ0 Junction

A. Buzdin

DOI 10.1103/PhysRevLett.101.107005 · Physical Review Letters

T1

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Abstract

We study the proximity effect between conventional superconductor and magnetic normal metal with a spin-orbit interaction of the Rashba type. Using the phenomenological Ginzburg-Landau theory and the quasiclassical Eilenberger approach it is demonstrated that the Josephson junction with such a metal as a weak link has a special nonsinusoidal current-phase relation. The ground state of this junction is characterized by the finite phase difference φ0, which is proportional to the strength of the spin-orbit interaction and the exchange field in the normal metal. The proposed mechanism of the φ0 junction formation gives a direct coupling between the superconducting current and the magnetic moment in the weak link. Therefore the φ0 junctions open interesting perspectives for the superconducting spintronics.

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Formula	Reported Tc (K)	Pressure (GPa)	Type
CePt3Si Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown