Stability of non-centrosymmetric phases in tetra-coordinated of LDTM intercalates
https://doi.org/10.32523/ejpfm.2023070406
Abstract
On the basis of comparison of temperature dependences of lattice parameters of CuCrSe2 and Cu0.5ZrSe2 in the temperature region including transition between phases with centrosymmetric and noncentrosymmetric distribution of copper on positions tetrahedrally coordinated by selenium. It is concluded that the critical factor that ensures the stability of the non- centrosymmetric copper distribution is the covalent interaction between copper and selenium sublattices. This effect is not related to the anisotropy of the elastic constants of the lattice and can be observed in other layered structures with copper tetrahedrally coordinated by chalcogen.
Keywords
Supporting agencies: Funding for this research was provided by: Russian Science Foundation (project No. 22-13-00361).
About the Authors
A. S. Shkvarin
M.N. Mikheev lnstitute of Metal Physics of Ural Branch of Russian Academy of Sciences
Russian Federation
Russian Federation
Yekaterinburg
M.S. Postnikov
M.N. Mikheev lnstitute of Metal Physics of Ural Branch of Russian Academy of Sciences
Russian Federation
Russian Federation
Yekaterinburg
S. V. Pryanichnikov
Institute of Metallurgy Ural Branch of Russian Academy of Sciences
Russian Federation
Russian Federation
Yekaterinburg
A. N. Titov
M.N. Mikheev lnstitute of Metal Physics of Ural Branch of Russian Academy of Sciences
Russian Federation
Russian Federation
Yekaterinburg
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Review
For citations:
Shkvarin A.S., Postnikov M., Pryanichnikov S.V., Titov A.N. Stability of non-centrosymmetric phases in tetra-coordinated of LDTM intercalates. Eurasian Journal of Physics and Functional Materials. 2023;7(4):256-263. https://doi.org/10.32523/ejpfm.2023070406
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