Symmetry of Valence States of Heusler Compounds Explored by Linear Dichroism in 
Hard-X-Ray Photoelectron Spectroscopy

Ouardi, Siham; Fecher, Gerhard H.; Kozina, Xeniya; Stryganyuk, Gregory; Balke, Benjamin; Felser, Claudia; Ikenaga, Eiji; Sugiyama, Takeharu; Kawamura, Naomi; Suzuki, Motohiro; Kobayashi, Keisuke

doi:10.1103/PhysRevLett.107.036402

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Symmetry of Valence States of Heusler Compounds Explored by Linear Dichroism in Hard-X-Ray Photoelectron Spectroscopy

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Citation

Ouardi, S., Fecher, G. H., Kozina, X., Stryganyuk, G., Balke, B., Felser, C., et al. (2011). Symmetry of Valence States of Heusler Compounds Explored by Linear Dichroism in Hard-X-Ray Photoelectron Spectroscopy. Physical Review Letters, 107(3): 036402, pp. 1-4. doi:10.1103/PhysRevLett.107.036402.

Cite as: https://hdl.handle.net/11858/00-001M-0000-0018-B4F3-7

Abstract

This study reports on the linear dichroism in angular-resolved photoemission from the valence band of the Heusler compounds NiTi0.9Sc0.1Sn and NiMnSb. High-resolution photoelectron spectroscopy was performed with an excitation energy of h nu = 7.938 keV. The linear polarization of the photons was changed using an in-vacuum diamond phase retarder. The valence band spectra exhibit the typical structure expected from first-principles calculations of the electronic structure of these compounds. Noticeable linear dichroism is found in the valence band of both materials, and this allows for a symmetry analysis of the contributing states. The differences in the spectra are found to be caused by symmetry-dependent angular asymmetry parameters, and these occur even in polycrystalline samples without preferential crystallographic orientation.