TY - JOUR
T1 - Asymmetrical bonding in liquid Bi disentangled by inelastic X-ray scattering
AU - Inui, Masanori
AU - Kajihara, Yukio
AU - Munejiri, Shuji
AU - Hosokawa, Shinya
AU - Chiba, Ayano
AU - Ohara, Koji
AU - Tsutsui, Satoshi
AU - Baron, Alfred Q.R.
N1 - Funding Information:
The authors would like to thank the Ministry of Education, Culture, Sports, Science and Technology, Japan, for a Grant-in-Aid for Scientific Research. The synchrotron radiation experiments were performed at the SPring-8 with the approval of the Japan Synchrotron Radiation Research Institute (JASRI) (Proposals No. 2011B1314, No. 2010B1173, and No. 2009B1283). M. I. would like to thank The Japan Science Society for Sasakawa Grants for Science Fellows (SGSF).
Publisher Copyright:
© The Authors, published by EDP Sciences, 2017.
PY - 2017/8/21
Y1 - 2017/8/21
N2 - 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..
AB - 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..
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U2 - 10.1051/epjconf/201715106001
DO - 10.1051/epjconf/201715106001
M3 - Conference article
AN - SCOPUS:85028874810
SN - 2101-6275
VL - 151
JO - EPJ Web of Conferences
JF - EPJ Web of Conferences
M1 - 06001
T2 - 16th International Conference on Liquid and Amorphous Metals, LAM 2016
Y2 - 4 September 2016 through 9 September 2016
ER -