THEORY OF AUGER-ELECTRON AND APPEARANCE-POTENTIAL SPECTROSCOPY FROM SOLIDS WITH PARTIALLY FILLED VALENCE BANDS - EFFECTS OF VALENCE-BAND CORE INTERACTION

DC FieldValueLanguage
dc.contributor.authorPOTTHOFF, M
dc.contributor.authorBRAUN, J
dc.contributor.authorBORSTEL, G
dc.contributor.authorNOLTING, W
dc.date.accessioned2021-12-23T16:10:02Z-
dc.date.available2021-12-23T16:10:02Z-
dc.date.issued1993
dc.identifier.issn01631829
dc.identifier.urihttps://osnascholar.ub.uni-osnabrueck.de/handle/unios/9116-
dc.description.abstractCVV Auger electron and appearance-potential spectra of solids are well known to exhibit strong satellite features depending on the ratio of on-site Coulomb interaction among the valence-band electrons U and the width of the free Bloch band W. We present a theory that additionally includes the effects of the Coulomb interaction between the valence-band electrons and the core electrons U(c). The spectra are influenced by the screening of the core hole in the initial state for Auger electron spectroscopy (AES), the sudden response of the valence-band electrons after the destruction of the core hole and, for appearance-potential spectroscopy (APS), by the scattering at the core hole in the final state. These effects become important especially for systems with partially filled energy bands. For APS, however, the U(c) interaction already yields nontrivial effects for the limiting case of a completely empty valence band. The localized core hole implies a breakdown of translational symmetry in the distribution of the valence-band electrons, which renders the calculation more difficult. But, extending the theory to finite temperatures, we will show that the translational symmetry may be reestablished in a formal way. Both the AES and APS intensities are directly related to a proper three-particle spectral density that exactly reflects the crystal periodicity. Within the framework of the single-band Hubbard model, which is extended to include the U(c) interaction, we calculate the three-particle spectral density in a generalized ladder approximation. The U(c) interaction is treated by means of perturbation theory. We develop the theory for the zeroth- and first-order contributions and look at the interesting limiting cases of a completely filled and empty valence band.
dc.language.isoen
dc.publisherAMERICAN PHYSICAL SOC
dc.relation.ispartofPHYSICAL REVIEW B
dc.subjectCOPPER
dc.subjectCU
dc.subjectHUBBARD-MODEL
dc.subjectL2,3VV
dc.subjectLINE-SHAPES
dc.subjectMaterials Science
dc.subjectMaterials Science, Multidisciplinary
dc.subjectNI
dc.subjectPHOTOEMISSION
dc.subjectPhysics
dc.subjectPhysics, Applied
dc.subjectPhysics, Condensed Matter
dc.subjectSILVER
dc.subjectSPECTRA
dc.subjectTRANSITION-METALS
dc.titleTHEORY OF AUGER-ELECTRON AND APPEARANCE-POTENTIAL SPECTROSCOPY FROM SOLIDS WITH PARTIALLY FILLED VALENCE BANDS - EFFECTS OF VALENCE-BAND CORE INTERACTION
dc.typejournal article
dc.identifier.doi10.1103/PhysRevB.47.12480
dc.identifier.isiISI:A1993LE96600011
dc.description.volume47
dc.description.issue19
dc.description.startpage12480
dc.description.endpage12497
dc.publisher.placeONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
dcterms.isPartOf.abbreviationPhys. Rev. B
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