Spin-polarized confined states in Ag films on Fe(1 1 0). (16th November 2017)

• Record Type: Journal Article
• Authors: Moras, P; Bihlmayer, G; Vescovo, E; Sheverdyaeva, P M; Papagno, M; Ferrari, L; Carbone, C
• Is Part Of: Journal of physics. Volume 29:Number 49(2017)
• Publication Date: 2017-11-16
• Subjects: spin-resolved photoemission -- thin films -- quantum well states; Condensed matter -- Periodicals; Matière condensée -- Périodiques; Vaste stoffen; Vloeistoffen; Natuurkunde; Electronic journals; Computer network resources; 530.4105
• DOI: 10.1088/1361-648X/aa9760
• Languages: English
• ISSNs: 0953-8984

Abstract

Abstract: Spin- and angle-resolved photoemission spectroscopy of thin Ag(1 1 1) films on ferromagnetic Fe(1 1 0) shows a series of spin-polarized peaks. These features derive from Ag sp -bands, which form quantum well states and resonances due to confinement by a spin-dependent interface potential barrier. The spin-up states are broader and located at higher binding energy than the corresponding spin-down states at Γ ̄, although the differences attenuate near the Fermi level. The spin-down states display multiple gap openings, which interrupt their parabolic-like dispersion. First-principles calculations attribute these findings to the symmetry- and spin-selective hybridization of the Ag states with the exchange-split bands of the substrate.