Abstract
The application of different quantum-chemical methods to the evaluation of coupling parameters of the Ising model (Jij) is treated for the TKHS family crystals. Two approaches to the Jij parameter evaluation are developed. The use of calculated Jij values for the description of some distinctive features of the TKHS-like materials is discussed. The critical hydrogen concentrations (xc) resulting in the disappearance of the low-temperature structural phase transition for isotopically mixed H-D crystals are examined.
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© 2001 Springer Science+Business Media Dordrecht
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Dolin, S.P., Levin, A.A., Mikhailova, T.Y., Solin, M.V. (2001). Quantum-Chemical Approach to Zero-Dimensional Antiferroelectrics and Quantum Paraelectrics of the K3H(SO4)2 Family. In: Kaplan, M.D., Zimmerman, G.O. (eds) Vibronic Interactions: Jahn-Teller Effect in Crystals and Molecules. NATO Science Series, vol 39. Springer, Dordrecht. https://doi.org/10.1007/978-94-010-0985-0_30
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DOI: https://doi.org/10.1007/978-94-010-0985-0_30
Publisher Name: Springer, Dordrecht
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