SCREENING OF THE PHOTON FIELD IN SURFACE PHOTOEMISSION FROM SIMPLE METALS

S. Natschläger, J. Alberich, N. Barberán, J. Bausells, R. Ruppin and C. Simó
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S. Natschläger: Institut für Theoretische Physik, Johannes Kepler Universität, A-4040 Linz, Austria
J. Alberich: Departament d'Estructura i Constituents de la Matèria, Facultat de Física, Universitat de Barcelona, E-08028 Barcelona, Spain
N. Barberán: Departament d'Estructura i Constituents de la Matèria, Facultat de Física, Universitat de Barcelona, E-08028 Barcelona, Spain
J. Bausells: Centro Nacional de Microelectrónica-CSIC, E-08193 Bellaterra (Barcelona), Spain
R. Ruppin: SOREQ NRC, Yavne 81800, Israel
C. Simó: Departament de Matemàtica Aplicada i Analisi, Universitat de Barcelona, E-08007 Barcelona, Spain

Surface Review and Letters (SRL), 2000, vol. 07, issue 03, 243-255

Abstract: A previous two-step hydrodynamic model calculation of angle-resolved photoemission has been improved by modeling the surface with a soft analytic function. The same ground state potential is used to screen the photon field and to calculate the electronic wave functions. The implemented code can be used for arbitrary ground state densities along the perpendicular direction. Mathematical and physical aspects of the model are discussed extensively. The behavior of the main peak of the spectrum in response to the variation of some parameters leads us to the conclusion that the peak cannot be interpreted as the direct excitation of multipole modes. This conclusion was suggested in the previous two-step model calculation.

Keywords: 73.20.Mf; 73.50.Pz (search for similar items in EconPapers)
Date: 2000
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DOI: 10.1142/S0218625X00000385

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