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Lattice distortion of quantum cryocrystals under pressure
The hcp lattice distortion parameter δ, the deviation of c/a ratio from the ideal hcp value √ 8/3 , have been calculated for solid He under pressure taking into account two- and three-body interatomic forces. The resulting lattice distortion parameter is small and negative, that is the lattice is sl...
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Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України
2006
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| Series: | Физика низких температур |
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| Online Access: | http://dspace.nbuv.gov.ua/handle/123456789/120889 |
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irk-123456789-1208892017-06-14T03:05:59Z Lattice distortion of quantum cryocrystals under pressure Tretyak, S.M. Antsygina, T.N. Freiman, Yu.A. Cryocrystals The hcp lattice distortion parameter δ, the deviation of c/a ratio from the ideal hcp value √ 8/3 , have been calculated for solid He under pressure taking into account two- and three-body interatomic forces. The resulting lattice distortion parameter is small and negative, that is the lattice is slightly flattened compared with the ideal hcp lattice. It monotonically increases in absolute value with pressure and reaches 10⁻³ for molar volume of ~ 2.5 cm³/mol. Such small distrotions are most likely outside of possibilities of x-ray or neutron experiments but can be detected by optical methods based on measurements of the birefringence. The data on δ can be used as a probe of the many-body forces. 2006 Article Lattice distortion of quantum cryocrystals under pressure / S.M. Tretyak, T.N. Antsygina, Yu.A. Freiman // Физика низких температур. — 2006. — Т. 32, № 11. — С. 1409–1413. — Бібліогр.: 18 назв. — англ. 0132-6414 PACS: 64.60.Cn, 67.80.–s, 67.90.+z, 81.40.Vw http://dspace.nbuv.gov.ua/handle/123456789/120889 en Физика низких температур Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України |
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Digital Library of Periodicals of National Academy of Sciences of Ukraine |
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DSpace DC |
| language |
English |
| topic |
Cryocrystals Cryocrystals |
| spellingShingle |
Cryocrystals Cryocrystals Tretyak, S.M. Antsygina, T.N. Freiman, Yu.A. Lattice distortion of quantum cryocrystals under pressure Физика низких температур |
| description |
The hcp lattice distortion parameter δ, the deviation of c/a ratio from the ideal hcp value √ 8/3 , have been calculated for solid He under pressure taking into account two- and three-body interatomic forces. The resulting lattice distortion parameter is small and negative, that is the lattice is slightly flattened compared with the ideal hcp lattice. It monotonically increases in absolute value with pressure and reaches 10⁻³ for molar volume of ~ 2.5 cm³/mol. Such small distrotions are most likely outside of possibilities of x-ray or neutron experiments but can be detected by optical methods based on measurements of the birefringence. The data on δ can be used as a probe of the many-body forces. |
| format |
Article |
| author |
Tretyak, S.M. Antsygina, T.N. Freiman, Yu.A. |
| author_facet |
Tretyak, S.M. Antsygina, T.N. Freiman, Yu.A. |
| author_sort |
Tretyak, S.M. |
| title |
Lattice distortion of quantum cryocrystals under pressure |
| title_short |
Lattice distortion of quantum cryocrystals under pressure |
| title_full |
Lattice distortion of quantum cryocrystals under pressure |
| title_fullStr |
Lattice distortion of quantum cryocrystals under pressure |
| title_full_unstemmed |
Lattice distortion of quantum cryocrystals under pressure |
| title_sort |
lattice distortion of quantum cryocrystals under pressure |
| publisher |
Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України |
| publishDate |
2006 |
| topic_facet |
Cryocrystals |
| url |
http://dspace.nbuv.gov.ua/handle/123456789/120889 |
| citation_txt |
Lattice distortion of quantum cryocrystals under pressure / S.M. Tretyak, T.N. Antsygina, Yu.A. Freiman // Физика низких температур. — 2006. — Т. 32, № 11. — С. 1409–1413. — Бібліогр.: 18 назв. — англ. |
| series |
Физика низких температур |
| work_keys_str_mv |
AT tretyaksm latticedistortionofquantumcryocrystalsunderpressure AT antsyginatn latticedistortionofquantumcryocrystalsunderpressure AT freimanyua latticedistortionofquantumcryocrystalsunderpressure |
| first_indexed |
2023-10-18T20:37:48Z |
| last_indexed |
2023-10-18T20:37:48Z |
| _version_ |
1796150704340992000 |