Speaker
Anna Hartl
(Paul Scherrer Institut)
Description
In ARPES, coupling of polarized light to the valence-band states contains valuable information about their orbital and spin texture. This information, however, is distorted by non-trivial behavior of the photoemission matrix elements. We explored the circular dichroism in InAs(110) over a broad photon-energy range from VUV to soft X-rays, focusing on the Fermi-surface maps. Supported by ARPES computations based on the multiple-scattering Green’s function approach (SPR-KKR), we analyzed the experimental data in terms of photon-energy-dependent final states and dichroic matrix elements. Our methodology paves the way towards ARPES investigations of the orbital and spin texture in complex quantum materials.
Author
Anna Hartl
(Paul Scherrer Institut)
Co-authors
Dmitry Usanov
(Paul Scherrer Institut)
Enrico Della Valle
(Paul Scherrer Institut)
Ján Minár
(University of West Bohemia, Plzeň)
Vladimir Strokov
(Paul Scherrer Institut)