Asymmetrical bonding in liquid Bi disentangled by inelastic X-ray scattering

Masanori Inui, Yukio Kajihara, Shuji Munejiri, Shinya Hosokawa, Ayano Chiba, Koji Ohara, Satoshi Tsutsui, Alfred Q.R. Baron

Research output: Contribution to journalConference article

1 Citation (Scopus)

Abstract

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..

Original languageEnglish
Article number06001
JournalEPJ Web of Conferences
Volume151
DOIs
Publication statusPublished - 2017 Aug 21
Event16th International Conference on Liquid and Amorphous Metals, LAM 2016 - Bonn, Bad Godesberg, Germany
Duration: 2016 Sep 42016 Sep 9

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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    Inui, M., Kajihara, Y., Munejiri, S., Hosokawa, S., Chiba, A., Ohara, K., Tsutsui, S., & Baron, A. Q. R. (2017). Asymmetrical bonding in liquid Bi disentangled by inelastic X-ray scattering. EPJ Web of Conferences, 151, [06001]. https://doi.org/10.1051/epjconf/201715106001