Poisson’s ratio in cryocrystals under pressure

Автор(и)

  • Yu.A. Freiman B. Verkin Institute for Low Temperature Physics and Engineering of the National Academy of Sciences of Ukraine 47 Lenin Ave., Kharkov 61103, Ukraine
  • Alexei Grechnev B. Verkin Institute for Low Temperature Physics and Engineering of the National Academy of Sciences of Ukraine 47 Lenin Ave., Kharkov 61103, Ukraine
  • S.M. Tretyak B. Verkin Institute for Low Temperature Physics and Engineering of the National Academy of Sciences of Ukraine 47 Lenin Ave., Kharkov 61103, Ukraine
  • Alexander F. Goncharov Geophysical Laboratory, Carnegie Institution of Washington, 5251 Broad Branch Road NW, Washington DC 20015, USA
  • Eugene Gregoryanz Center for Energy Matter in Extreme Environments and Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences, 350 Shushanghu Road, Hefei, Anhui 230031, China

DOI:

https://doi.org/10.1063/1.4922095%20

Ключові слова:

Poisson’s ratio, rare gas solids, solid hydrogen, intermolecular potential.

Анотація

We present results of lattice dynamics calculations of Poisson’s ratio (PR) for solid hydrogen and rare gas solids (He, Ne, Ar, Kr and Xe) under pressure. Using two complementary approaches — the semi-empirical many-body calculations and the first-principle density-functional theory calculations we found three different types of pressure dependencies of PR. While for solid helium PR monotonically decreases with rising pressure, for Ar, Kr, and Xe it monotonically increases with pressure. For solid hydrogen and Ne the pressure dependencies of PR are nonmonotonic displaying rather deep minimums. The role of the intermolecular potentials in this diversity of patterns is discussed.

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Опубліковано

2015-04-17

Як цитувати

(1)
Freiman, Y.; Grechnev, A.; Tretyak, S.; Goncharov, A. F.; Gregoryanz, E. Poisson’s Ratio in Cryocrystals under Pressure. Fiz. Nizk. Temp. 2015, 41, 571-575.

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