Symmetry of valence states of heusler compounds explored by linear dichroism in Hard-x-ray photoelectron spectroscopy

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

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33 Citations (Scopus)

Abstract

This study reports on the linear dichroism in angular-resolved photoemission from the valence band of the Heusler compounds NiTi 0.9Sc0.1Sn and NiMnSb. High-resolution photoelectron spectroscopy was performed with an excitation energy of hν=7.938keV. 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.

Original languageEnglish
Article number036402
JournalPhysical review letters
Volume107
Issue number3
DOIs
Publication statusPublished - Jul 12 2011
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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