Ultrafast band-structure variations induced by fast Au ions in BeO
| Autor: | K. Czerski, Pedro Luis Grande, F. Staufenbiel, V. Koteski, Gregor Schiwietz |
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| Rok vydání: | 2011 |
| Předmět: |
Nuclear and High Energy Physics
Band gap 02 engineering and technology Electron Electron hole Wide-gap insulator 01 natural sciences 7. Clean energy Spectral line Ion Ion-track formation 0103 physical sciences Band-structure variation 010306 general physics Electronic band structure Instrumentation High electronic excitation density Auger electron spectroscopy Chemistry Melting 021001 nanoscience & nanotechnology Auger-electron emission Short-time electron dynamics Atomic physics 0210 nano-technology Excitation |
| Zdroj: | Nuclear Instruments and Methods in Physics Research. Section B: Beam Interactions with Materials and Atoms |
| ISSN: | 0168-583X |
| DOI: | 10.1016/j.nimb.2010.11.085 |
| Popis: | Auger-electron spectra associated with Be atoms in the pure metal lattice and in an oxide have been investigated for 1.8 MeV/u Au-129(41+) ions and 2.7 keV primary electrons. The excitation and local energy transfer by such fast primary particles in solids is dominated by electronic processes. The electron-induced spectrum is compared to calculated band-structure results and it is relatively well understood. For the heavy-ion case, however, we observe a significant variation of the Auger electron spectrum, related to a variation of the electronic band structure. This spectrum points to a formation of a metal-like meta-stable electronic density of states. (c) 2010 Elsevier B.V. All rights reserved. |
| Databáze: | OpenAIRE |
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