Spatial dependence of the dichroism of photoemission of Fe1/4TiTe2 upon excitation with circularly polarized radiation

This paper reports on the results of the experimental investigation into the angular dependence of the photoemission of the valence band (the angle-resolved photoelectron spectrum) for the Fe(1/4)TiTe(2) single crystal upon excitation with circularly polarized radiation. The angle-resolved photoelectron spectrum is studied in the vicinity of the Delta point of the Brillouin zone in the two directions Gamma K and Gamma with the highest symmetry. The measurements are performed in noncoplanar geometry. The circular dichroism in the photoemission angular distribution is observed over the entire ranges of energies and angles. The magnitude of the dichroism depends on the choice of the band, the binding energy, and the polar angle and varies from 0 at the Delta point to 20%.