Elementary terahertz spin interactions in magnetic solids (A05)

• Subject Area: Experimental Condensed Matter Physics
• Term: since 2018
• Project identifier: Deutsche Forschungsgemeinschaft (DFG) - Project number 328545488

This project aims at revealing elementary interactions of ordered spin systems with mobile electrons and lattice vibrations. We will employ a highly selective optical ultrafast pump-probe technique: An electromagnetic pump pulse, which is tunable from the terahertz to the ultraviolet spectral range, excites specific low-energy resonances such as phonons, conduction electrons or magnons. The impact on the spin and other degrees of freedom is monitored by a subsequent terahertz or optical probe pulse. We focus on insulating and conducting spintronic model systems with broken inversion symmetry (Mn2Au, (Bi,La)FeO3, stacks such as Co|Pt, YIG|Pt) as they allow for a linear magnetoelectric coupling through, for example, spin-orbit torques.

• DFG Programme: CRC/Transregios
• Subproject of: TRR 227: Ultrafast Spin Dynamics
• Applicant Institution: Freie Universität Berlin
• Project Heads: Professorin Dr. Kathrin Dörr, since 1/2022; Professor Dr. Tobias Kampfrath; Dr. Tom Sebastian Seifert, since 1/2022