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Current-Phase Relation of a Ferromagnetic Josephson Junction Between Triplet Superconductors
최치훈 한국물리학회 2017 새물리 Vol.67 No.9
We study the Josephson effect of a T$_1$FT$_2$ junction consisting of spin-triplet superconductors (T), a weak ferromagnetic metal (F), and ferromagnetic insulating interfaces. Two types of the triplet order parameters are considered: $(k_x +ik_y)\hat{z}$ and $k_x \hat{x}+k_y\hat{y}$. We compute the current density in the ballistic limit by using the generalized quasiclassical formalism developed to take into account the interference effect of a multilayered ferromagnetic junction. We discuss in detail how the current-phase relation is affected by the orientations of the d-vectors of the superconductor and the magnetizations of the ferromagnetic tunneling barrier. A general condition for the anomalous Josephson effect is also derived.