@article{oai:kumadai.repo.nii.ac.jp:00030170, author = {乾, 雅祝 and 梶原, 行夫 and 宗尻, 修治 and Hosokawa, Shinya and 細川, 伸也 and 千葉, 文野 and Chiba, Ayano and 尾原, 幸治 and 筒井, 智嗣 and 乾, 雅祝 and Inui, Masanori and Kajihara, Yukio and 宗尻, 修治 and Munejiri, Shuji and Hosokawa, Shinya and 千葉, 文野 and Chiba, Ayano and Ohara, Koji and Tsutsui, Satoshi and Baron, Alfred. Q. R.}, issue = {5}, journal = {Physical Review B}, month = {Aug}, note = {application/pdf, 論文(Article), nelastic x-ray scattering measurements on liquid Bi were carried out. Prominent acoustic mode excitations were observed in the dynamic structure factor to beyond 12nm−1, which resolves previously conflicting results as to their presence beyond 6nm−1. We find the dispersion curve of the excitation energy with momentum transfer is nearly flat from 7 to 15nm−1 consistent with ab initio calculations of liquid Bi [J. Souto et al., Phys. Rev. B 81, 134201 (2010)]. Our ab initio and classical molecular dynamics simulations suggest that a long-range force is needed to reproduce the flatness of the dispersion curve, and the long-range force is correlated with a local structure consisting of shorter and longer bonds in the liquid., https://journals.aps.org/prb/abstract/10.1103/PhysRevB.92.054206}, pages = {054206-1--054206-8}, title = {Anomalous dispersion of the acoustic mode in liquid Bi}, volume = {92}, year = {2015}, yomi = {ホソカワ, シンヤ and チバ, アヤノ and イヌイ, マサノリ and ムネジリ, シュウジ and チバ, アヤノ} }