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Building an atomic-scale vacuum trap for spin-polarized electrons

23.08.2019

Physicists at the University of Hamburg in Germany experimentally realized a spin-resolved electron interferometer on the atomic scale.

They placed an atomically sharp magnetic probe tip in front of a magnetic sample surface, thereby realizing a one-dimensional trap for electrons in the gap.


Artist’s view of the injection of spin-polarized electrons into a vacuum trap formed between an atomically sharp tip and magnetic atoms on a surface.

S. Krause, University of Hamburg

Only when resonance conditions in terms of electron energy and spin are fulfilled, standing wave states evolve in the trap, and injection of spin-polarized electrons into these states allows for the investigation of single electron reflection at the underlying atom at the surface.

Providing unprecedented insights into the atomic-scale scattering mechanism, the study potentially paves the way towards future spintronic devices employing spin-dependent electron scattering and transport.

Wissenschaftliche Ansprechpartner:

Dr. Anika Schlenhoff
Department of Physics
University of Hamburg
Phone: +49 40 42838 6201
E-Mail: aschlenh@physnet.uni-hamburg.de

Prof. Dr. Roland Wiesendanger
Department of Physics
University of Hamburg
Phone: +49 40 42838 5244
E-Mail: wiesendanger@physnet.uni-hamburg.de

Originalpublikation:

A. Schlenhoff, S. Kovařík, S. Krause, and R. Wiesendanger,
Vacuum resonance states as atomic-scale probes of noncollinear surface magnetism,
Phys. Rev. Lett. 123, 087202 (2019).
DOI: 10.1103/PhysRevLett.123.087202

Andrea Beese, FG "NANOSCIENCE", Uni Hamburg | idw - Informationsdienst Wissenschaft
Further information:
http://www.nanoscience.de

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