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pro vyhledávání: '"Freiman, Yu."'
The thermal expansion at constant pressure of solid CD$_4$ III is calculated for the low temperature region where only the rotational tunneling modes are essential and the effect of phonons and librons can be neglected. It is found that in mK region
Externí odkaz:
http://arxiv.org/abs/2009.00472
The effect of pressure on the thermal expansion of solid CH$_4$ is calculated for the low temperature region where the contributions from phonons and librons can be neglected and only the rotational tunnelling modes are essential. The effect of press
Externí odkaz:
http://arxiv.org/abs/1911.12655
Publikováno v:
Phys. Rev. Lett. 122, 199601 (2019)
X.-D. Liu et al. [Phys. Rev. Lett. 119, 065301 (2017)] report on the existence of a new unique solid phase of D2, which makes the high-pressure low-temperature behavior distinct from H2. Here, based on the analysis of their Raman data and phase trans
Externí odkaz:
http://arxiv.org/abs/1901.05286
Autor:
Freiman, Yu. A., Grechnev, Alexei, Tretyak, S. M., Goncharov, Alexander F., Gregoryanz, Eugene
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-pr
Externí odkaz:
http://arxiv.org/abs/1505.02949
The elastic moduli, elastic anisotropy coefficients, sound velocities and Poisson's ratio of hcp solid helium have been calculated using density functional theory in generalized gradient approximation (up to $30$ TPa), and pair+triple semi-empirical
Externí odkaz:
http://arxiv.org/abs/1505.00927
Autor:
Freiman, Yu. A., Tretyak, S. M., Grechnev, Alexei, Goncharov, Alexander F., Hemley, Russell J.
The lattice distortion parameter (the deviation of the c/a ratio from the ideal value 1.633), orientational order parameter, and crystal-field parameter in hexagonal close-packed (hcp) lattice of p-H2, o-D2 and n-H2 are calculated using the semi-empi
Externí odkaz:
http://arxiv.org/abs/1401.5928
Autor:
Freiman, Yu. A., Grechnev, Alexei, Tretyak, S. M., Goncharov, A. F., Zha, C. -s., Hemley, R. J.
Bulk, shear, and compressional aggregate sound velocities of hydrogen and helium in the close- packed hexagonal structure are calculated over a wide pressure range using two complementary approaches: semi-empirical lattice dynamics based on the many-
Externí odkaz:
http://arxiv.org/abs/1308.0913
Autor:
Freiman, Yu. A., Grechnev, Alexei, Tretyak, S. M., Goncharov, Alexander F., Hemley, Russell J.
We present results of lattice dynamics calculations of the $P-V$ equation of state and the pressure dependence of the Raman-active $E_{2g}$ lattice phonon for $p-$H$_2$ and $o-$D$_2$ in a wide pressure range up to $\sim$2 Mbar using our recently deve
Externí odkaz:
http://arxiv.org/abs/1203.0672
The lattice distortion parameter $\delta \equiv c/a-\sqrt{8/3}$ has been calculated as a function of molar volume for the hcp phases of He, Ar, Kr and Xe. Results from both semi-empirical potentials and density functional theory are presented. Our st
Externí odkaz:
http://arxiv.org/abs/0911.5600
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