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Journal Article

Extracting the Rashba splitting from scanning tunneling microscopy measurements


Ast,  C.
Max Planck Society;

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Ast, C. (2015). Extracting the Rashba splitting from scanning tunneling microscopy measurements. Journal of Electron Spectroscopy and Related Phenomena, 201, 30-35.

Cite as: https://hdl.handle.net/21.11116/0000-000E-CD50-1
The Rashba-type spin-splitting found in many two-dimensional electron systems at surfaces is a band splitting in momentum, which is most easily extracted from angular resolved photoemission data. Scanning tunneling microscopy as a real-space resolving technique relies on quasiparticle interference to extract momentum information about the experimental electronic structure. However, the lifted spin degeneracy in the Rashba split bands imposes a selection rule that makes it impossible to extract the Rashba splitting from single scattering events, e.g. scattering from a point defect in STM data. Nevertheless, going beyond single scattering events, the Rashba-type spin splitting can be extracted from STM data, which will be discussed in this review. (C) 2014 Elsevier B.V. All rights reserved.