The band structure of BeTe - a combined experimental and theoretical study
| Autor: | Andrzej Fleszar, Hans-Peter Steinrück, Werner Hanke, Th. Litz, M. Nagelstraßer, Andreas Waag, H. Dröge, F. Fischer, G. Landwehr |
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| Jazyk: | angličtina |
| Rok vydání: | 1997 |
| Předmět: |
Physics
Free electron model Valence (chemistry) Photoemission spectroscopy Inverse photoemission spectroscopy Soft Condensed Matter (cond-mat.soft) FOS: Physical sciences Angle-resolved photoemission spectroscopy Condensed Matter::Strongly Correlated Electrons Atomic physics Condensed Matter - Soft Condensed Matter Electronic band structure Spectral line |
| Popis: | Using angle-resolved synchrotron-radiation photoemission spectroscopy we have determined the dispersion of the valence bands of BeTe(100) along $\Gamma X$, i.e. the [100] direction. The measurements are analyzed with the aid of a first-principles calculation of the BeTe bulk band structure as well as of the photoemission peaks as given by the momentum conserving bulk transitions. Taking the calculated unoccupied bands as final states of the photoemission process, we obtain an excellent agreement between experimental and calculated spectra and a clear interpretation of almost all measured bands. In contrast, the free electron approximation for the final states fails to describe the BeTe bulk band structure along $\Gamma X$ properly. Comment: 21 pages plus 4 figures |
| Databáze: | OpenAIRE |
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