J. Phys. IV France 04 (1994) C9-209-C9-212
Core level photoemission from (111)-type InAs surfacesC.B.M. Andersson1, L.Ö. Olsson2, M.C. Håkansson3, L. Ilver2, U.O. Karlsson1 and J. Kanski2
1 Department of Physics, Royal Institute of Technology, 100 44 Stockholm, Sweden
2 Department of Physics, Chalmers University of Technology, 430 40 Göteborg, Sweden
3 Department of Synchrotron Radiation Research, University of Lund, 223 62 Lund, Sweden
The InAs(111)2x2 and InAs(-1-1-1)1x1 surfaces have been studied with high resolution core level spectroscopy. For the InAs(-1-1-1)1x1 surface both the In 4d and the As 3d core levels display strong surface core level shifts, while for the InAs(111)2x2 surface only the In 4d level shows a detectable surface shift. The results indicate that the InAs(-1-1-1)1x1 surface is relaxed, with atom layer displacement extending to subsurface layers. Unexpectedly, we find no surface shifted anion core level for the InAs(111)2x2 surface.
© EDP Sciences 1994