R. Yevych

activity

20102024

most citedSound behavior near the Lifshitz point in proper ferroelectrics

35 citations · 136 across the 12 of their papers we have counts for

collaborators

12 papers

cond-mat.soft2024

Description of CuInP $_{2}$ S $_{6}$ ferrielectrics in a mixed Ising model

R. Yevych, V. Liubachko, V. Hryts +3

The appearance of spontaneous polarization in CuInP $_{2}$ S $_{6}$ ferrielectrics is related to the second order Jahn-Teller effect for copper cations located in a double-well local…

cond-mat.mtrl-sci2023★ 3 cited

Ordering/displacive ferrielectricity in 2D CuInP $_{2}$ S $_{6}$

Yulian Vysochanskii, Vitalii Liubachko, Konstantin Glukhov +5

Using DFT-based molecular dynamics simulation of Cu $^{+}$ cations flipping and In $^{3 +}$ cations displacive dynamics, we clarify the dipole ordering of CuInP $_{2}$ S $_{6}$ ferrielectrics…

cond-mat.mtrl-sci2021

Phonon Spectra and Phase Transitions in van der Waals Ferroics MM $^{'}$ P $_{2}$ X $_{6}$

A. Kohutych, V. Liubachko, V. Hryts +6

For CuInP $_{2}$ S $_{6}$ layered ferrielectric crystal, that is most investigated among wide family of van der Waals ferroics MM $^{'}$ P $_{2}$ X $_{6}$ (M - Cu, Ag; M $^{'}$ - In, Bi, Cr, $\dots$ ; X -…

cond-mat.mtrl-sci2020★ 10 cited

Quantum paraelectric state and critical behavior in Sn(Pb) $_{2}$ P $_{2}$ S(Se) $_{6}$ ferroelectrics

I. Zamaraite, V. Liubachko, R. Yevych +5

The dipole ordering in Sn(Pb) $_{2}$ P $_{2}$ S(Se) $_{6}$ materials may be tuned by chemical substitution realizing a ferroelectric quantum phase transition and quantum glassy or relaxor typ…

cond-mat.mtrl-sci2019★ 10 cited

Phase diagram of ferroelectrics with tricritical and Lifshitz points at coupling between polar and antipolar fluctuations

V. Liubachko, A. Oleaga, A. Salazar +3

Static and dynamic critical behavior of Sn $_{2}$ P $_{2}$ S $_{6}$ type ferroelectrics and (Pb $_{y}$ Sn $_{1 - y}$ ) $_{2}$ P $_{2}$ (Se $_{x}$ S $_{1 - x}$ ) $_{6}$ mixed crystals with line of tricritical points and…

cond-mat.mtrl-sci2018★ 5 cited

Description of lattice anharmonicity observed in ferroelectrics with unusual three-well local potential

R. Yevych, Yu. Vysochanskii

For Sn $_{2}$ P $_{2}$ S $_{6}$ family of uniaxial ferroelectrics, the anharmonic quantum oscillators model, based on local three-well potential for spontaneous polarization fluctuations, has…

cond-mat.mtrl-sci2018★ 17 cited

Nonlinear dynamics of ferroelectrics with three-well local potential

R. Yevych, M. Medulych, Yu. Vysochanskii

For Sn $_{2}$ P $_{2}$ S $_{6}$ ferroelectrics, the appearance of spontaneous polarization is related to stereoactivity of tin cations and valence fluctuations of phosphorous cations. Here, t…

cond-mat.mtrl-sci2018★ 16 cited

Double hysteresis loops in proper uniaxial ferroelectrics

I. Zamaraite, R. Yevych, A. Dziaugys +4

For the first time in a bulk proper uniaxial ferroelectrics, double antiferroelectric-like hysteresis loops have been observed in the case of Sn $_{2}$ P $_{2}$ S $_{6}$ crystal. The quantum…

cond-mat.mtrl-sci2016★ 24 cited

Valence fluctuations in Sn(Pb) $_{2}$ P $_{2}$ S $_{6}$ ferroelectrics

R. Yevych, V. Haborets, M. Medulych +5

The valence fluctuations which are related to the charge disproportionation of phosphorous ions $P^{4 +} + P^{4 +} \to P^{3 +} + P^{5 +}$ are the origin of ferroelectric and qua…

cond-mat.mtrl-sci2014

Ferroelectricity in (Pb $_{y}$ Sn $_{1 - y}$ ) $_{2}$ P $_{2}$ S $_{6}$ mixed crystals and random field BEG model

K. Z. Rushchanskii, R. M. Bilanych, A. A. Molnar +6

For Sn $_{2}$ P $_{2}$ S $_{6}$ ferroelectrics the second order phase transitions line is observed until reaching the tricritical point at transition temperature lowering to 250 K by compress…

cond-mat.mtrl-sci2014★ 16 cited

Observation of Kibble-Zurek behavior near the Lifshitz point in ferroelectrics with incommensurate phase

K. Z. Rushchanskii, A. Molnar, R. Bilanych +5

We have investigated non-equilibrium properties of proper uniaxial Sn $_{2}$ P $_{2}$ (Se $_{x}$ S $_{1 - x}$ ) $_{6}$ ferroelectrics with the Type II incommensurate phase above Lifshitz point $x_{\r…

cond-mat.mtrl-sci2010★ 35 cited

Sound behavior near the Lifshitz point in proper ferroelectrics

A. Kohutych, R. Yevych, S. Perechinskii +3

The interaction between soft optic and acoustic phonons was investigated for Sn2P2(Se0.28S0.72)6 proper uniaxial ferroelectrics by Brillouin scattering and ultrasonic pulse-echo te…

Description of CuInP2​S6​ ferrielectrics in a mixed Ising model

Ordering/displacive ferrielectricity in 2D CuInP2​S6​

Phonon Spectra and Phase Transitions in van der Waals Ferroics MM′P2​X6​

Quantum paraelectric state and critical behavior in Sn(Pb)2​P2​S(Se)6​ ferroelectrics