Experimental Determination Of Valence Band Offset At Pbte/cdte(111) Heterojunction Interface By X-ray Photoelectron Spectroscopy

摘要

Lattice-matched PbTe/CdTe(111) heterojunction interfaces were studied using x-ray photoelectron spectroscopy. A type-Ⅰ band alignment with a valence band offset of △E_v= 0.135 ±0.05 eV and a conduction band offset of △E_c= 1.145 ±0.05 eV is concluded. Within experimental error the determined valence band offset is in agreement with theoretical prediction by inclusion of spin-orbit interaction.