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Experimental Methods for Spin- and Angle-Resolved Photoemission Spectroscopy Combined with Polarization-Variable Laser
Published on: June 28, 2018
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Rotatable spin-polarized electron source for inverse-photoemission experiments
S D Stolwijk1, H Wortelen1, A B Schmidt1
1Physikalisches Institut, Westfälische Wilhelms-Universität Münster, Wilhelm-Klemm-Str. 10, 48149 Münster, Germany.
The Review of Scientific Instruments
|February 13, 2014
Summary
A novel Rotatable Spin-polarized Electron source (ROSE) enables advanced spin- and angle-resolved inverse-photoemission (SR-IPE) experiments. This technology enhances sensitivity to electron spin polarization, crucial for studying surface magnetism and spin-orbit interactions.
Area of Science:
- Surface Science
- Condensed Matter Physics
- Materials Science
Background:
- Spin- and angle-resolved inverse-photoemission (SR-IPE) is a powerful technique for probing unoccupied electronic states.
- Understanding electron spin polarization is critical for advancements in spintronics and surface magnetism.
- Existing electron sources have limitations in controlling and analyzing spin polarization directions.
Purpose of the Study:
- To introduce and characterize a novel Rotatable Spin-polarized Electron source (ROSE).
- To demonstrate the enhanced capabilities of SR-IPE experiments with variable spin polarization.
- To enable detailed investigations of spin-dependent electronic structures and phenomena at surfaces.
Main Methods:
- Development and implementation of the Rotatable Spin-polarized Electron source (ROSE).
- Characterization of the ROSE performance through SR-IPE experiments.
- Application of ROSE-SR-IPE to magnetized Ni films and Tl/Si(111) surfaces.
Main Results:
- The ROSE provides a variable direction of transversal electron beam polarization.
- SR-IPE experiments with ROSE show sensitivity to orthogonal in-plane and out-of-plane polarization components.
- Demonstrated variable spin sensitivity using Ni films and analyzed spin rotations in Tl/Si(111).
Conclusions:
- The ROSE significantly advances SR-IPE capabilities for surface electronic structure analysis.
- It facilitates detailed studies of spin-dependent phenomena, including spin rotations and surface magnetism.
- ROSE is a key development for future research in spintronics and surface spin physics.
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