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HL: Fachverband Halbleiterphysik

HL 30: 2D Materials V – Magnetic, spintronic, and topological properties (joint session HL/TT)

HL 30.4: Vortrag

Mittwoch, 11. März 2026, 16:15–16:30, POT/0081

Proposal for Resolving Quantized Landau Orbits via Elastic XUV Scattering — •Sabrina Meyer¹, Andreas Knorr¹, Stephen Hughes², and Lara Greten^1,2 — ¹Institut für Physik und Astronomie, Technische Universität Berlin, Germany — ²Department of Physics, Queen's University, Kingston, Canada

In a strong perpendicular magnetic field, a two-dimensional electron gas is quantized into discrete Landau levels. We propose a method to extract the spatial structure of Landau orbits via scattering with extreme ultraviolet radiation, whose wavelength naturally matches the Larmor radius. In a microscopic theory, we derive the far-field spectrum emitted by the optically induced current density. Contributions from Landau orbits within this spectrum are suppressed due to scattering effects imposed by the sample geometry. By normalizing against the zero-magnetic-field reference, however, we define a Landau level scattering spectrum that isolates Landau orbit information. This gives access to the probability density distributions of individual Landau level wave functions featuring radial maxima at the quantized Larmor radii.

Keywords: Theory; Landau level; Extreme Ultraviolet Radiation (XUV); Scattering