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Updated: Jul 2, 2026

Probe Type II Band Alignment in One-Dimensional Van Der Waals Heterostructures Using First-Principles Calculations
Published on: October 12, 2019
Spin-orbit hybridization points in the face-centered-cubic cobalt band structure
M Pickel1, A B Schmidt, F Giesen
1Physikalisches Institut, Westfälische Wilhelms-Universität Münster, Wilhelm-Klemm-Strasse 10, 48149 Münster, Germany.
Spin-polarized electronic states in cobalt films exhibit magnetic dichroism. These findings reveal spin-hot spots crucial for understanding ultrafast demagnetization processes.
Area of Science:
- Condensed matter physics
- Materials science
- Surface science
Background:
- Understanding magnetic properties of materials at the nanoscale is crucial for developing advanced magnetic technologies.
- Epitaxial growth of cobalt on copper surfaces provides a platform for studying fundamental magnetic phenomena.
Purpose of the Study:
- To investigate the origin of linear magnetic dichroism in cobalt films.
- To identify the electronic states responsible for magnetic dichroism and their role in ultrafast demagnetization.
Main Methods:
- Spin-, time-, and energy-resolved two-photon photoemission spectroscopy.
- Ab initio fully relativistic band structure calculations.
- Utilizing image-potential states as spectator states.
Main Results:
- Observed linear magnetic dichroism in epitaxial fcc cobalt on Cu(001).
- Identified bulk and surface states with minority spin character as the source of dichroic intensities and lifetimes.
- Determined spin-orbit hybridization points near the Fermi level, termed 'spin hot spots'.
Conclusions:
- Spin hot spots significantly enhance spin-flip scattering.
- These spin hot spots are critical for understanding ultrafast demagnetization mechanisms in magnetic materials.
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