Abstract
X-ray diffraction and inelastic x-ray scattering measurements of liquid Ba8Ga16Sn30 have been carried out to investigate local structure and atomic dynamics in the liquid. The pair distribution function shows shorter and longer interatomic distances in the first coordination shell. The dynamic structure factor exhibits the inelastic excitations on both sides of the quasielastic central peak. The inelastic excitations disperse with increasing the momentum transfer, suggesting the longitudinal acoustic mode. We found a low energy excitation in addition to the longitudinal acoustic excitation in the dynamic structure factor and it reminds us a strong relationship with a rattling motion of a guest (Ba) atom in the solid state. The temperature dependence of the pair distribution function and the longitudinal acoustic excitation energy is very weak in a range from 600 to 900 °C. The result suggests that Ba and other atoms in the melt are located around minimum positions of the effective pair potential approximated as a harmonic one.
| Original language | English |
|---|---|
| Article number | 455101 |
| Journal | Journal of Physics Condensed Matter |
| Volume | 30 |
| Issue number | 45 |
| DOIs | |
| Publication status | Published - Oct 18 2018 |
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All Science Journal Classification (ASJC) codes
- Materials Science(all)
- Condensed Matter Physics
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Static and dynamic structures of liquid Ba8Ga16Sn30 : A melt of the thermoelectric clathrate compounds. / Inui, M.; Suekuni, K.; Kajihara, Y.; Hosokawa, S.; Takabatake, T.; Nakajima, Y.; Matsuda, K.; Ohara, K.; Uchiyama, H.; Tsutsui, S.
In: Journal of Physics Condensed Matter, Vol. 30, No. 45, 455101, 18.10.2018.Research output: Contribution to journal › Article
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TY - JOUR
T1 - Static and dynamic structures of liquid Ba8Ga16Sn30
T2 - A melt of the thermoelectric clathrate compounds
AU - Inui, M.
AU - Suekuni, K.
AU - Kajihara, Y.
AU - Hosokawa, S.
AU - Takabatake, T.
AU - Nakajima, Y.
AU - Matsuda, K.
AU - Ohara, K.
AU - Uchiyama, H.
AU - Tsutsui, S.
PY - 2018/10/18
Y1 - 2018/10/18
N2 - X-ray diffraction and inelastic x-ray scattering measurements of liquid Ba8Ga16Sn30 have been carried out to investigate local structure and atomic dynamics in the liquid. The pair distribution function shows shorter and longer interatomic distances in the first coordination shell. The dynamic structure factor exhibits the inelastic excitations on both sides of the quasielastic central peak. The inelastic excitations disperse with increasing the momentum transfer, suggesting the longitudinal acoustic mode. We found a low energy excitation in addition to the longitudinal acoustic excitation in the dynamic structure factor and it reminds us a strong relationship with a rattling motion of a guest (Ba) atom in the solid state. The temperature dependence of the pair distribution function and the longitudinal acoustic excitation energy is very weak in a range from 600 to 900 °C. The result suggests that Ba and other atoms in the melt are located around minimum positions of the effective pair potential approximated as a harmonic one.
AB - X-ray diffraction and inelastic x-ray scattering measurements of liquid Ba8Ga16Sn30 have been carried out to investigate local structure and atomic dynamics in the liquid. The pair distribution function shows shorter and longer interatomic distances in the first coordination shell. The dynamic structure factor exhibits the inelastic excitations on both sides of the quasielastic central peak. The inelastic excitations disperse with increasing the momentum transfer, suggesting the longitudinal acoustic mode. We found a low energy excitation in addition to the longitudinal acoustic excitation in the dynamic structure factor and it reminds us a strong relationship with a rattling motion of a guest (Ba) atom in the solid state. The temperature dependence of the pair distribution function and the longitudinal acoustic excitation energy is very weak in a range from 600 to 900 °C. The result suggests that Ba and other atoms in the melt are located around minimum positions of the effective pair potential approximated as a harmonic one.
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U2 - 10.1088/1361-648X/aae3f3
DO - 10.1088/1361-648X/aae3f3
M3 - Article
C2 - 30251705
AN - SCOPUS:85055605218
VL - 30
JO - Journal of Physics Condensed Matter
JF - Journal of Physics Condensed Matter
SN - 0953-8984
IS - 45
M1 - 455101
ER -