Josephson Effect in Magnetic Superconductors with Spiral Magnetic Order
Loading...
Date
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
Abstract
Description
It is shown that in magnetic superconductors with spiral magnetic order the Josephson current has an additional contribution which depends: (i) on the relative orientation (magnetic phase) $θ=θ_{L}-θ_{R}$ of magnetizations on the left ($L$) and right ($R$) banks of the contact, (ii) on the junction helicity $χ=χ_{L}χ_{R}$, (with spiral helicity $χ_{L(R)}=\pm 1$), i.e. $J=[J_{c}-J_χ\cos θ]\sin ϕ$ with $ϕ=ϕ_{L}-ϕ_{R}$. The ratio $R_χ\equiv J_χ/J_{c}$ is calculated as a function of the superconducting order parameter $Δ$, the exchange field energy $h$ and the wave vector $Q$ of the spiral magnetic structure. The $π$-Josephson contact can be realized in such a system in some region of parameters. Some possible consequences of this new phase relation is also analyzed.
RevTex 8 pages. Replacing with a new version with corrected error
RevTex 8 pages. Replacing with a new version with corrected error