| Issue |
EPJ Web of Conferences
Volume 41, 2013
XVIIIth International Conference on Ultrafast Phenomena
|
|
|---|---|---|
| Article Number | 03008 | |
| Number of page(s) | 3 | |
| Section | Correlated Electron Systems, Magnetization, and Spin Dynamics | |
| DOI | https://doi.org/10.1051/epjconf/20134103008 | |
| Published online | 13 March 2013 | |
https://doi.org/10.1051/epjconf/20134103008
Dynamics of optical phonons in Bi2Se3 crystal studied using femtosecond time-resolved reflection measurement
1 Materials and Structures Laboratory, Tokyo Institute of Technology, R3-10, 4259 Nagatsuta, Yokohama 226-8503, Japan
2 2CREST, Japan Science and Technology Agency, Kawaguchi 332-0012, Japan
The dynamics of coherent optical phonons (A1g1, A1g2 and Eg2) in Bi2Se3 single crystal have been observed by using femtosecond time-resolved reflection measurement. The phonons with the higher frequency have the faster damping rate (decay faster). The A1g2 phonons show cosine-like oscillation, while the A1g1 and Eg2 phonons show cosine-like oscillation. The difference in the initial phase suggests that the potential energy surface may shift significantly along the A1g2 eigenvector and little along the A1g1 and Eg2 eigenvectors in the excited state.
© Owned by the authors, published by EDP Sciences, 2013
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 2.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.