Cd1-xFexTe Ternary Crystal Formation Studied by Resonant Photoemission

E. Guziewicz, B.J. Kowalski, Z. Gołacki, B.A. Orłowski, R.L. Johnson, J. Masek
1997 Acta Physica Polonica. A  
A resonant photoemission was used to study the ternary crystal formation, when small amount of Fe atoms was deposited (in one monolayer range of thickness) on the clean CdTe(100) surface. The constant initial state spectra taken near the Fe 3p-3d transition after Fe deposition and then again after heating process show the existence of two Fano-like resonance. The differences of the energy distribution curves taken for both resonance and antiresonance, respectively, allow us to distinguish two
more » ... o distinguish two kind of Fe 3d contributions to the valence band: one derived from the metallic Fe islands on the surface and the second -derived from the Fe atoms built into the Cd1-xFexTe crystal. PACS numbers: 79.60. 68.35.Fx In the very first stages of the metal atoms deposition on clean semiconductor surface the Shottky barrier can be formed if the deposited atoms create the islands of metal and then monolayer of it. If the deposited atoms react with the substrate the doping of semiconductor surface region appears and the ternary crystal layer can be created on the surface. The paper presents results of a unique experimental method very sensitive on surface electronic properties to distinguish between these two possible positions in a case of Fe atoms deposited on CdTe clean surface. Recently many of investigations are sacrificed to study the process of formation of semimagnetic semiconductors (SMSC) in the region near the surface, when transition metal (ΤΜ) atoms were deposited on the clean II-VI or II1-V semiconductor's surface [1-3]. (793)
doi:10.12693/aphyspola.92.793 fatcat:xgvw3s6jsncqvkgnkthby3catu