TY - JOUR
T1 - Low energy excitation in liquid Sb and liquid Bi observed in inelastic x-ray scattering spectra
AU - Inui, M.
AU - Kajihara, Y.
AU - Hosokawa, S.
AU - Chiba, A.
AU - Nakajima, Y.
AU - Matsuda, K.
AU - Stellhorn, J. R.
AU - Hagiya, T.
AU - Ishikawa, D.
AU - Uchiyama, H.
AU - Tsutsui, S.
AU - Baron, A. Q.R.
N1 - Funding Information:
The authors acknowledge the Japan Society for the Promotion of Science (JSPS) for a Grantin- Aid for Scientific Research (A) (Grant No. 20244061). The synchrotron radiation experiments were performed at the SPring-8 with the approval of the Japan Synchrotron Radiation Research Institute (JASRI) (Proposal Nos. 2017A1173 and 2011B1314).
Publisher Copyright:
© 2021 IOP Publishing Ltd.
PY - 2021/11/24
Y1 - 2021/11/24
N2 - The dynamic structure factor S(Q, E), where Q and E are momentum and energy transfer, respectively, has been measured for liquid Sb, using inelastic x-ray scattering. A modified damped harmonic oscillator model function was applied to analyse S(Q, E) of liquid Sb and also to that of liquid Bi by Inui et al (2015 Phys. Rev. B 92, 054206). The obtained excitation energy was in fairly good agreement with that predicted by ab initio molecular dynamics simulations on these liquid semi-metals. The excitation energy of the longitudinal acoustic mode in liquid Sb and liquid Bi exhibits flat-topped Q dependence whereas the lower excitation energy below the longitudinal acoustic excitation shows Q-gap behaviour. From the viscosity estimated from the Q-gap experimentally obtained, it is inferred that the lower energy excitation arises from the transverse acoustic excitation in the liquids.
AB - The dynamic structure factor S(Q, E), where Q and E are momentum and energy transfer, respectively, has been measured for liquid Sb, using inelastic x-ray scattering. A modified damped harmonic oscillator model function was applied to analyse S(Q, E) of liquid Sb and also to that of liquid Bi by Inui et al (2015 Phys. Rev. B 92, 054206). The obtained excitation energy was in fairly good agreement with that predicted by ab initio molecular dynamics simulations on these liquid semi-metals. The excitation energy of the longitudinal acoustic mode in liquid Sb and liquid Bi exhibits flat-topped Q dependence whereas the lower excitation energy below the longitudinal acoustic excitation shows Q-gap behaviour. From the viscosity estimated from the Q-gap experimentally obtained, it is inferred that the lower energy excitation arises from the transverse acoustic excitation in the liquids.
KW - atomic dynamics
KW - dynamic structure factor
KW - inelastic x-ray scattering
KW - liquid metal
KW - Peierls distortion
KW - transverse acoustic excitation
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U2 - 10.1088/1361-648X/ac216c
DO - 10.1088/1361-648X/ac216c
M3 - Article
C2 - 34438373
AN - SCOPUS:85115985871
VL - 33
JO - Journal of Physics Condensed Matter
JF - Journal of Physics Condensed Matter
SN - 0953-8984
IS - 47
M1 - 475101
ER -