Resonant photoemission spectroscopy of atomic layer Fe2N on Cu(111) with continuous angular rotation of linearly polarized light

M Horio; Y Kudo; T Wada; T Sumi; Y Hirata; M Niibe; F Komori; I Matsuda

doi:10.1088/1361-648X/ace600

Resonant photoemission spectroscopy of atomic layer Fe₂N on Cu(111) with continuous angular rotation of linearly polarized light

J Phys Condens Matter. 2023 Jul 21;35(42). doi: 10.1088/1361-648X/ace600.

Authors

M Horio¹, Y Kudo¹, T Wada¹, T Sumi¹, Y Hirata², M Niibe¹, F Komori¹, I Matsuda¹

Affiliations

¹ Institute for Solid State Physics, The University of Tokyo, Kashiwa, Chiba 277-8581, Japan.
² National Defense Academy of Japan, Yokosuka, Kanagawa 239-8686, Japan.

PMID: 37429290
DOI: 10.1088/1361-648X/ace600

Abstract

Linearly polarized soft x-rays provide information about electronic or magnetic anisotropy through absorption into materials or generation of photoelectrons. In order to change the relative angle between linear polarization and sample crystalline axes, either x-ray polarization or the sample needs to be rotated. Due to difficulties of polarization control in the soft x-ray range, a conventional approach was to rotate the sample. However, this method is not compatible, for example, withoperandomeasurements on non-uniform samples where sample size and rotational motion are severely restricted. At BL07LSU of SPring-8, we developed a new method to rotate the linear polarization angle using a segmented cross undulator. We report an application of this linear polarization rotation to resonant photoemission spectroscopy on an magnetic atomic layer Fe₂N on Cu(111) to probe the electronic anisotropy of the 3dstates in the vicinity of the Fermi level.

Keywords: atomic layer; resonant photoemission spectroscopy; rotation of linear polarization.