Lattice dynamics of cryocrystals at high pressure

Classical Cryocrystals

Автор(и)

  • E.E. Horbenko Donetsk A.A. Galkin Institute of Physics and Technology of the National Academy of Sciences of Ukraine, 72 R. Luxemburg Str., Donetsk 83114, Ukraine
  • E.P. Troitskaya Donetsk A.A. Galkin Institute of Physics and Technology of the National Academy of Sciences of Ukraine, 72 R. Luxemburg Str., Donetsk 83114, Ukraine
  • Val.V. Chabanenko Donetsk A.A. Galkin Institute of Physics and Technology of the National Academy of Sciences of Ukraine, 72 R. Luxemburg Str., Donetsk 83114, Ukraine

DOI (Low Temperature Physics):


https://doi.org/10.1063/1.2755181

Ключові слова:

rare-gas solids, phonon spectrum, electron–phonon interaction, high pressure.

Анотація

The lattice dynamics of cryocrystals is investigated from first principles in the framework of the Tolpygo model over a wide range of pressures. The phonon frequencies in rare-gas solids are calculated in terms of models that go beyond the scope of adiabatic approximation. At high pressure the phonon spectrum along the D and ∑ directions is distorted and the longitudinal L- and transverse T2-modes soften as a result of the electron–phonon interaction, with the relative contribution decreasing in the sequence Ar, Kr, Xe. The calculated phonon frequencies are in good agreement with the experimental data for argon crystals of a pressure 3.1 GPa.

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Опубліковано

2007-05-30

Як цитувати

(1)
E.E. Horbenko, E.P. Troitskaya, and Val.V. Chabanenko, Lattice dynamics of cryocrystals at high pressure: Classical Cryocrystals, Low Temp. Phys. 33, (2007) [Fiz. Nizk. Temp. 33, 752-757, (2007)] DOI: https://doi.org/10.1063/1.2755181.

Номер

Том 33 № 6-7 (2007)

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