Regensburg 2025 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 10: Focus Session Ultrafast Electron Microscopy at the Space-Time Limit II
O 10.3: Vortrag
Montag, 17. März 2025, 15:45–16:00, H2
Simulating Quantum Spin Dynamics in Transmission Electron Microscopy — •Santiago Beltrán Romero1,2, Dennis Rätzel3, Stefan Löffler2, and Philipp Haslinger1,2 — 1VCQ, Atominstitut, TU Wien, Stadionallee 2, 1020 Vienna, Austria — 2University Service Centre for Transmission Electron Microscopy,TU Wien, Wiedner Hauptstraße 8-10/E057-02, 1040 Wien, Austria — 3ZARM, Unversität Bremen, Am Fallturm 2, 28359 Bremen, Germany
Transmission Electron Microscopy (TEM) has revolutionized nanoscale research by enabling unprecedented simultaneous spatial and temporal resolutions, thanks to advancements such as aberration correction, cryogenic techniques, and ultra-fast probing. However, the capabilities of TEM to probe spin dynamics -- critical for understanding quantum materials -- are, to date, quite limited and could be significantly improved by novel microwave spectroscopic tools [1, 2]. Building on recent innovations in that direction, we present a framework that integrates scattering theory and multislice simulations to describe the probing of spin samples on the nanoscale with time-resolved TEM. Our simulations offer insights into both elastic and inelastic processes - including the electrons backaction on the spin. They reveal how the choice of set-up parameters influence the precision of spin detection, identifying optimized conditions for enhancing the signal-to-noise ratio (SNR) and contrast. This work sets the stage for combining spin resonance tools with cutting-edge TEM capabilities, paving the way for breakthroughs in spin imaging and manipulation at the atomic level.
Keywords: Spin resonance; Transmission electron microscopy; Pump-probe Spectroscopy; Time.resolved; Nanoscale