Low-energy electron diffraction with signal electron carrier-wave wavenumber modulated by signal exchange-correlation interaction. (18th October 2021)

• Record Type: Journal Article
• Authors: Rundgren, John; Sernelius, Bo E; Moritz, Wolfgang
• Is Part Of: Journal of physics communications. Volume 5:Number 10(2021)
• Publication Date: 2021-10-18
• Subjects: surface physics -- low-energy electron diffraction -- elastic electron-atom scattering in solids and surface slabs -- signal electron self-energy in solids -- signal electron exchange-correlation interaction; Physics -- Periodicals; 530.05
• DOI: 10.1088/2399-6528/ac2c31
• Languages: English
• ISSNs: 2399-6528

Abstract

Abstract: Low-energy electron diffraction (LEED) is considered as elastic electron-atom scattering (EEAS) operating in a target crystal waveguide, where a signal electron carrier wave is wavenumber modulated by signal exchange-correlation (XC) interaction. A carrier potential is designed using a KKR (Korringa-Kohn-Rostoker) muffin-tin (MT) model built on overlapping MT spheres that implement atoms with double degree of freedom, radius and potential level. An XC potential is constructed using Sernelius's many-particle theory on electron self-energy. EEAS phase shifts are derived from Dirac's differential equations, and four recent LEED investigations are recalculated: Cu(111) + (3 √ 3 × √ 3)R30° -TMB, TMB = 1, 3, 5-tris(4-mercaptophenyl)-benzene with chemical formula C24 H15 S3 ; Ag(111) + (4 × 4)-O; Ag(111) + (7 × √ 3)rect-SO4 ; and Ru(0001) + ( √ 3 × √ 3)R30° -Cl. Our EEAS phase shifts generate substantially improved reliability factors, and we report the first confirmation of electron self-energy by LEED experiment.