Electron structure and electron dynamics at InSb(111)2×2 semiconductor surface
| Autor: | Henrik S. Karlsson, Ulf O. Karlsson, Michael A. Grishin, Martin Månsson |
|---|---|
| Rok vydání: | 2003 |
| Předmět: |
Condensed matter physics
business.industry Chemistry Inverse photoemission spectroscopy Angle-resolved photoemission spectroscopy General Chemistry Electron Electronic structure Laser law.invention Semiconductor law Excited state General Materials Science Atomic physics Diffusion (business) business |
| Zdroj: | Applied Physics A: Materials Science & Processing. 76:299-302 |
| ISSN: | 1432-0630 0947-8396 |
| DOI: | 10.1007/s00339-002-1811-z |
| Popis: | The conduction band electronic structure and the electron dynamics of the clean InSb(111)2×2 surface have been studied by laser based pump-and-probe photoemission. The results are compared to earlier studies of the InSb(110) surface. It is found that both the energy location and the time dependence of the photoexcited structures are very similar for the two surfaces. This indicates that the dominant part of the photoemission signal in the conduction band region is due to excitations of electrons in the bulk region and that the surface electronic states play a minor role. The fast decay of the excited state, τ∼12 ps, indicates that diffusion of hot electrons into the bulk is an important mechanism. |
| Databáze: | OpenAIRE |
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