High-frequency spin noise dynamics in magnetically ordered systems (B06)

• Subject Area: Experimental Condensed Matter Physics ; Theoretical Condensed Matter Physics
• Term: since 2021
• Project identifier: Deutsche Forschungsgemeinschaft (DFG) - Project number 425217212

This project aims at studying the high-frequency spin fluctuations in magnetically ordered materials and heterostructures using a combination of experimental and theoretical methods. We want to use pure optical spin-noise spectroscopy to investigate the relationship between spin and magnon noise at GHz frequencies, and we also want to develop ultrafast spin-noise spectroscopy experiments to investigate the dynamics of spin fluctuations on picosecond time scales. With the accompanying atomistic spin simulations, we will simulate the spin or magnon noise and thus both contribute to the interpretation of the experiments and make predictions for more complex systems such as magnetic heterostructures.

• DFG Programme: Collaborative Research Centres
• Subproject of: SFB 1432: Fluctuations and Nonlinearities in Classical and Quantum Matter beyond Equilibrium
• Major Instrumentation: High frequency lock-in amplifier ; Spectrum analyser for GHz SNS
• Instrumentation Group: 6160 Diskriminatoren, Einkanalanalysatoren (außer Analog-Klassiergeräte 734) ; 6380 Frequenzanalysatoren, Schwingungsanalysatoren
• Applicant Institution: Universität Konstanz
• Project Heads: Professor Dr. Sebastian Gönnenwein; Professor Dr. Ulrich Nowak