Ferromagnetic proximity effect in ferromagnetic-semiconductor hybrid structures

• Applicant: Professor Dr. Vladimir Lvovich Korenev
• Subject Area: Experimental Condensed Matter Physics
• Term: since 2023
• Project identifier: Deutsche Forschungsgemeinschaft (DFG) - Project number 524671439

Tailoring the optical and magnetic properties of semiconductor (SC) structures by bringing them together with ferromagnetic materials can be used to establish new functionalities in spintronic devices. Particular interest represents magnetic proximity effect which is manifested in the coupling of spins in a ferromagnet (FM) to carrier spins in a non-magnetic semiconductor heterostructure close to the ferromagnet/semiconductor interface. The project focuses on elucidating the mechanisms of spin-spin interactions of charge carriers and the role of long-range exchange interaction in the magnetic proximity effect in emerging hybrid FM/SC structures. We will elucidate the nature of the magnetic proximity effect in novel ferromagnet / van der Waals 2D material heterostructures, as well as the possibility of phonon transfer of angular momentum from a magnet to a 2D material. At the same hand we will study spin textures using magnetic proximity effect as a local probe and explore the main pathways for magnetic and optical control of spin textures. A full set of optical methods such as optical orientation and Hanle effect, spin-flip Raman spectroscopy, time-resolved photoluminescence and pump-probe Kerr rotation will be used in order to determine which carriers are involved in the proximity effect (holes or electrons) and to distinguish between equilibrium and dynamic mechanisms. The obtained results will significantly contribute to the development of reliable reading and writing of information in an optical and electrical way in spintronic devices using novel spin-spin interactions.

• DFG Programme: WBP Position