6533b7d1fe1ef96bd125ce38
RESEARCH PRODUCT
Symmetry of valence states of Heusler compounds explored by linear dichroism in hard-x-ray photoelectron spectroscopy.
Gregory StryganyukKeisuke KobayashiEiji IkenagaTakeharu SugiyamaXeniya KozinaSiham OuardiMotohiro SuzukiClaudia FelserBenjamin BalkeNaomi KawamuraGerhard H. Fechersubject
Materials scienceValence (chemistry)Linear polarizationmedia_common.quotation_subjectGeneral Physics and AstronomyElectronic structureLinear dichroismAsymmetryMolecular physicsSpectral lineCondensed Matter::Materials ScienceX-ray photoelectron spectroscopyCondensed Matter::Strongly Correlated ElectronsAtomic physicsExcitationmedia_commondescription
This study reports on the linear dichroism in angular-resolved photoemission from the valence band of the Heusler compounds ${\mathrm{NiTi}}_{0.9}{\mathrm{Sc}}_{0.1}\mathrm{Sn}$ and NiMnSb. High-resolution photoelectron spectroscopy was performed with an excitation energy of $h\ensuremath{\nu}=7.938\text{ }\text{ }\mathrm{keV}$. 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.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2011-07-12 | Physical review letters |