Publications by authors named "Olivier Heckmann"
Article Synopsis
- The study investigates excitons in 2H-WSe_{2} using advanced spectroscopic techniques, focusing on how these excitons can be manipulated through the use of circularly polarized light.
- The XUV photoemission method allows researchers to specifically measure the spin polarization of both bright and dark excitons at the surface level, revealing a difference in their behaviors.
- Findings indicate that while bright excitons' spin polarization diminishes due to scattering, dark excitons may serve as a resource for local spin polarization, potentially benefiting spin injection in layered materials.
Epitaxial growth and structure of cobalt ferrite thin films with large inversion parameter on Ag(001).
Acta Crystallogr B Struct Sci Cryst Eng Mater
February 2019
Cobalt ferrite ultrathin films with the inverse spinel structure are among the best candidates for spin filtering at room temperature. High-quality epitaxial CoFeO films about 4 nm thick have been fabricated on Ag(001) following a three-step method: an ultrathin metallic CoFe alloy was first grown in coherent epitaxy on the substrate and then treated twice with O, first at room temperature and then during annealing. The epitaxial orientation and the surface, interface and film structure were resolved using a combination of low-energy electron diffraction, scanning tunnelling microscopy, Auger electron spectroscopy and in situ grazing-incidence X-ray diffraction.
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