2015/05/20 by Klaus Halterman, Mohammad Alidoust · 45 citations
Materials Science · Physics and Astronomy · #Charge (physics) #Context (archaeology) #Controllability #Ferromagnetism #Iron-based superconductors research #Magnetization #Physics of Superconductivity and Magnetism #Spin (aerodynamics) #Superconductivity #Topological Materials and Phenomena #Torque #cond-mat.mes-hall #cond-mat.supr-con
paper · pdf · doi:10.1088/0953-2048/29/5/055007
published in Superconductor Science and Technology 29(5), 055007 (IOP Publishing)
arxiv created 2015/05/20 · openalex publication_date 2016/03/30 · arxiv updated 2016/04/20 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/06
Utilizing a full microscopic Bogoliubov–de Gennes (BdG) approach, we study the equilibrium charge and spin currents in ballistic SFSFS Josephson systems, where F is a uniformly magnetized ferromagnet and S is a conventional s-wave superconductor. From the spatially varying spin currents, we also calculate the associated equilibrium spin-transfer torques. Through variations in the relative phase differences between the three S regions, and magnetization orientations of the ferromagnets, our study demonstrates tunability and controllability of the spin and charge supercurrents. The spin-transfer torques are shown to reveal details of the proximity effects that play a crucial role in these types of hybrid system. The proposed SFSFS nanostructure is discussed within the context of a superconducting magnetic torque transistor.