Experimental determination of valence band offset at PbTe/CdTe(111) heterojunction interface by x-ray photoelectron spectroscopy

Jianxiao Si; Shuqiang Jin; Hanjie Zhang; Ping Zhu; Dongjiang Qiu; Huizhen Wu
November 2008
Applied Physics Letters;11/17/2008, Vol. 93 Issue 20, p202101
Academic Journal
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 ΔEV=0.135±0.05 eV and a conduction band offset of ΔEC=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.


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