Spin polarized currents in superconductor-ferromagnet and antiferromagnet-ferromagnet heterostructures

• Applicant: Professor Dr. Konstantin Efetov (†)
• Subject Area: Theoretical Condensed Matter Physics
• Term: from 2013 to 2017
• Project identifier: Deutsche Forschungsgemeinschaft (DFG) - Project number 218651856

The main objectives of the project is study of fast processes in materials with order parameters of different types, e.g., superconductivity (SC) and charge- or spin-density wave (CDW and SDW, correspondingly), and in nanostructures composed of such materials. The interest in studying these processes has drastically arisen in the last years as a result of the development of technology and methods of measurement using time resolution of the order of several hunreds or even tens femtoseconds. On the basis of the developed theoretical methods (Keldysh Green functions approach) we plan to investigate the dynamics of order parameters of different types in systems where they may coexist (i.a., in recently discovered pnictide-superconductors, in cuprates, etc.), and also in hybrid structures like superconductor-ferromagnet, superconductor-(spin-density wave material) and other combinations.We will describe time evolution of the order parameters involved, e.g., after a stimulation of the system by a LASER pulse. We plan to calculate also non-stationary Josephson and spin currents in Josephson-like junctions of the form superconductor-ferromagnet-superconductor, superconductor-(spin-density wave material)-superconductor and other combinations.The research and results planned in this project are of great interest not only from the perspective of fundamental research but they may have numerous applications. The field of spintronics with modern devices based on magnetic and superconducting materials and heterostructures, and short time processes is one of examples.

• DFG Programme: Research Grants
• Cooperation Partner: Professor Anatoly F. Volkov