Gaussian fluctuations of polarization in the region of phase transitions in DMAGaS-DMAAlS ferroelectrics in the framework of the four-state model von Stasyuk, I.V., Velychko, O.V.

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Two-state Bose-Hubbard model in the hard-core boson limit von Stasyuk, I.V., Velychko, O.V.

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New type phase transitions in the Mitsui model with bimodal random field von Stasyuk, I.V., Velychko, O.V.

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Bose-Einstein condensation and/or modulation of "displacements" in the two-state Bose-Hubbard model von Stasyuk, I.V., Velychko, O.V.

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Phonon-like excitations in the two-state Bose-Hubbard model von Stasyuk, I.V., Velychko, O.V., Vorobyov, O.

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Thermodynamics and dielectric anomalies of DMAAS and DMAGaS crystals in the region of phase transitions (Landau theory approach) von Stasyuk, I.V., Velychko, O.V., Czapla, Z., Czukwinski, R.

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