Nature of the band discontinuities at semiconductor heterojunction interfaces |
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Authors: | G Margaritondo AD Katnani NG Stoffel RR Daniels Te-Xiu Zhao |
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Institution: | Department of Physics, University of Wisconsin, Madison, Wis. 53706, USA |
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Abstract: | A clear correlation was found between experimental heterojunction valence-band discontinuities locally measured by photoemission spectroscopy and the LCAO results of the Harrison model. In particular, we found that the theoretical discontinuities are accurate within 0.1–0.15 eV for lattice-matched interfaces. Empirical corrections for the bond-length difference in lattice-mismatched interfaces generally improve the agreement between theory and experiment. |
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