Forschungszentrum Jülich’s tabletop momentum microscope
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- Forschungszentrum Jülich built a new momentum microscope that combines electron momentum and spin detection in a single instrument.
- Dr. Christian Tusche led the development, having previously advanced momentum microscopy at the Max Planck Institute of Microstructure Physics and receiving the Kai Siegbahn Prize (2018) and Synchrotron Radiation Innovation Award (2016).
- The momentum microscope uses a powerful tabletop UV laser instead of large synchrotron or X‑ray sources, making it more efficient and capable of sharper images of electron states.
- The device can map electron momentum, spin, orbital character, and spatial/temporal changes in a single experiment, providing a complete picture of electron quantum states.
- The time‑resolved capability enabled by the laser allows ultrafast processes—such as electronic device switching—to be investigated.
- The team demonstrated a two‑dimensional semimetal that conducts electrons with a specific spin direction, a potential breakthrough for spintronics, and observed a new orbital angular momentum control effect, suggesting future orbitronics applications.
Why it matters: University labs and industry R&D groups gain direct access to momentum‑resolved electron imaging without needing costly synchrotron facilities, accelerating spintronic and orbitronic research while reducing experimental overhead; meanwhile, large‑scale user facilities may see significantly decreased demand for routine measurements in the field.
