First-principles calculations of spin and angle-resolved resonant photoemission spectra of Cr(110) surfaces at the 2$p$ - 3$d$ resonance

Abstract

A first principles approach for spin and angle resolved resonant photoemission is developed within multiple scattering theory and applied to a Cr(110) surface at the 2$p$-3$d$ resonance. The resonant photocurrent from this non ferromagnetic system is found to be strongly spin polarized by circularly polarized light, in agreement with experiments on antiferromagnetic and magnetically disordered systems. By comparing the antiferromagnetic and Pauli-paramagnetic phases of Cr, we explicitly show that the spin polarization of the photocurrent is independent of the existence of local magnetic moments, solving a long-standing debate on the origin of such polarization. New spin polarization effects are predicted for the paramagnetic phase even with unpolarized light, opening new directions for full mapping of spin interactions in macroscopically non magnetic or nanostructured systems.

5 pages, 5 figures

References in corpus (4)

• Bethe-Salpeter Equation Calculations of Core Excitation Spectra
• Nanoscale Dichotomy of Ti 3d Carriers Mediating the Ferromagnetism in Co:TiO2 Anatase Thin Films
• Many-body effects in x-ray absorption and magnetic circular dichroism spectra within the LSDA+DMFT framework
• Resonant Photoelectron Diffraction with circularly polarized light

Cited by in corpus (3)

• One-step approach to ARPES from strongly correlated solids: a Mott-Hubbard system
• Real space Green's function approach to angle resolved resonant photoemission: spin polarization and circular dichroism in itinerant magnets
• Fingerprints of entangled spin and orbital physics in itinerant ferromagnets via angle resolved $resonant$ photoemission