Anomalous detection‐energy dependence of coherent phonon in bismuth thin films
| Autor: | Kohji Mizoguchi, Ryosuke Morishita, Goro Oohata |
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| Rok vydání: | 2010 |
| Předmět: |
Materials science
Condensed matter physics Phonon chemistry.chemical_element Condensed Matter::Mesoscopic Systems and Quantum Hall Effect Condensed Matter Physics Semimetal Symmetry (physics) Pulsed laser deposition Intensity (physics) Bismuth Condensed Matter::Materials Science chemistry Condensed Matter::Superconductivity Condensed Matter::Strongly Correlated Electrons Thin film Energy (signal processing) |
| Zdroj: | physica status solidi c. 8:169-172 |
| ISSN: | 1610-1642 1862-6351 |
| DOI: | 10.1002/pssc.201000652 |
| Popis: | Coherent phonons in semimetal Bi thin films have been studied by using a spectrally-resolved pump-probe technique. It is found that the intensity of the coherent phonon with A1g symmetry in the Bi thin film changes with the detection energy. The detection-energy dependence of the coherent phonon intensity indicates that the phonon intensity has two peaks at the energies shifted by about twice the phonon energy from the central energy of the pulse laser. We discuss the origin of the detection-energy dependence of the phonon intensity from the viewpoint of the generation mechanism of the coherent phonon. (© 2011 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim) |
| Databáze: | OpenAIRE |
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