Spin-Polarized Two-Electron Spectroscopy of Surfaces

Description

This book presents developments of techniques for detection and analysis of two electrons resulting from the interaction of a single incident electron with a solid surface. Spin dependence in scattering of spin-polarized electrons from magnetic and non-magnetic surfaces is governed by exchange and spin-orbit effects. The effects of spin and angular electron momentum are shown through symmetry of experimental geometries: (i) normal and off normal electron incidence on a crystal surface, (ii) spin polarization directions within mirror planes of the surface, and (iii) rotation and interchange of detectors with respect to the surface normal. Symmetry considerations establish relationships between the spin asymmetry of two-electron distributions and the spin asymmetry of Spectral Density Function of the sample, hence providing information on the spin-dependent sample electronic structure. Detailed energy and angular distributions of electron pairs carry information on the electron-electron interaction and electron correlation inside the solid. The “exchange – correlation hole” associated with Coulomb and exchange electron correlation in solids can be visualized using spin-polarized two-electron spectroscopy. Also spin entanglement of electron pairs can be probed. A description of correlated electron pairs generation from surfaces using other types of incident particles, such as photons, ions, positrons is also presented. Front Matter ....Pages i-xi Introduction (Sergey Samarin, Oleg Artamonov, Jim Williams)....Pages 1-4 New Experimental Technique for Studying Electron-Electron Interaction, Electron Correlation, Mechanism of Electron Emission and Electronic Properties of Surfaces (Sergey Samarin, Oleg Artamonov, Jim Williams)....Pages 5-86 Spin-Polarized (e,2e) Spectroscopy of Surfaces (Sergey Samarin, Oleg Artamonov, Jim Williams)....Pages 87-201 Emission of Correlated Electron Pairs from Surfaces Induced by Photons, Positrons and Ions (Sergey Samarin, Oleg Artamonov, Jim Williams)....Pages 203-223 Back Matter ....Pages 225-232