Research Highlights Campaign for Notebook

Winner of Notebook Competition

 We are happy to announce the winner of the competition: Alexander Stibor's "Near-Monochromatic Tuneable Cryogenic Niobium Electron Field Emitter"
The winner got his discovery printed on a Notebook, being displayed at the APS March Meeting 2023.

Title of paper:
Near-Monochromatic Tuneable Cryogenic Niobium Electron Field Emitter

Tells us how Scienta Omicron has helped you achieve your research goal:
We measured the field emitted electron beam energy distribution with the ScientaOmicron DA20 R analyzer

Briefly describe why the result is important and of general interest to the scientific community:
Electron microscopy and spectroscopy are currently restricted by beam sources with relatively large energy spread (200-1000 meV). We have realized a superconducting monocrystalline niobium nanotip electron field emitter with an unprecedented ultra-narrow tuneable energy distribution down to only 16 meV (measured with the ScientaOmicron DA20 R analyzer) and with high brightness and coherence. The emission process uses resonant quantum surface states from a nano-protrusion that can be energetically shifted by the applied voltage and cut off by the sharp low-temperature Fermi edge. The outstanding performance leap opens up new fields in aberration-corrected microscopy, high-resolution vibrational spectroscopy, electron energy loss spectroscopy, multipass-transmission electron microscopy, and metrology with electron matter-waves. We published the data in Phys. Rev. Lett. 129, 244802 (2022).

List of authors:
C. W. Johnson, A. K. Schmid, M. Mankos, R. Röpke, N. Kerker, E. K. Wong, D. F. Ogletree, A. M. Minor, and A. Stibor

Research institute:
Lawrence Berkeley National Lab


Key dates: Submission is now closed!

Thank you for choosing to share your research with us. Please complete the submission form below for a chance to win your highlight being showcased on our conference handout notebooks: 1st place will be shown on the cover and will receive large format laboratory log-books for their own use; runner-up submissions will also being included in the notebook. Winners will be announced on our website and social media channels.

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