Magneto-electric coupling in a two-dimensional ballistic Josephson junction with in-plane magnetic texture

2014/08/20 by François Konschelle, Konschelle, François
Physics and Astronomy · #Physics of Superconductivity and Magnetism #Quantum and electron transport phenomena #Cold Atom Physics and Bose-Einstein Condensates

paper · pdf · doi:10.48550/arxiv.1408.4533

Abstract

We study a Josephson junction made with a spin-textured bridge, when both Rashba and Zeeman interactions combine to generate a magneto-electric coupling between the superconducting current and the in-plane magnetic texture in the normal region. In particular, we unambiguously obtain the so-called anomalous current-phase relation j=j_csinφ+j_acosφ in a two-dimensional ballistic Josephson junction close to the critical temperature of the heterostructure, when an anomalous current j_a≠0 subsists even at zero phase-difference between the superconductors, and is responsible for the coupling between the magnetic and electric degrees of freedom of the junction. The anomalous magneto-electric current is due to the combination of the chirality of the propagating modes and the anisotropy of the in-plane magnetic texture.

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