EPJ Web Conf.
Volume 151, 201716th International Conference on Liquid and Amorphous Metals (LAM-16)
|Number of page(s)||7|
|Section||Excitations in liquids|
|Published online||21 August 2017|
Asymmetrical bonding in liquid Bi disentangled by inelastic X-ray scattering
1 Graduate School of integrated Arts and Sciences, Hiroshima University, Higashi-Hiroshima, Hiroshima 739-8521, Japan
2 Department of Physics, Graduate School of Science and Technology, Kumamoto University, Kumamoto 860-8555, Japan
3 Department of Physics, Keio University, Yokohama 223-8522, Japan
4 Japan Synchrotron Radiation Research Institute, SPring-8, Sayo-gun, Hyogo 679-5198, Japan
5 Materials Dynamics Laboratory, RIKEN SPring-8 Center, Sayo-gun, Hyogo 679-5148, Japan
* e-mail: email@example.com
Published online: 21 August 2017
The structure of liquid Bi has been debated in relationship with the Peierls distortion, as crystalline Bi takes A7 structure. A recent ab initio molec- ular dynamics simulation for liquid Bi predicted a flat-topped profile of the acoustic dispersion curve. To confirm the prediction, we have carried out inelas- tic x-ray scattering (IXS) for liquid Bi. The dynamic structure factor obtained by the IXS exhibits a distinct inelastic excitation of the longitudinal acoustic mode up to 14 nm−1 and the dispersion curve of the excitation energy obtained by the memory function analysis becomes a flat-topped one. We found that a linear chain model including the interatomic interaction with the second near- est neighbors can explain the flat-topped profile. The result suggests that the anomalous dispersion curve in liquid Bi arises from local anisotropy related to the Peierls distortion in the crystalline phase. .
© The Authors, published by EDP Sciences, 2017
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, 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.