A New Model of Ferroelectric Phase Transition with Neglectable Tunneling Effect*

Yin, Hongfeng; Heng-Wei, Zhou; Huang, Yineng

doi:10.1088/0256-307x/36/7/070501

Cited by 4 publications

(4 citation statements)

References 41 publications

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“…These values are comparable to the traditional ferroelectric materials such as PbTiO 3 (∼200 meV) [36,37] and the 2D ferroelectric In 2 Se 3 (66 meV), [5] indicating that an applied gate field can be readily to switch monolayer CuMoP 2 S 6 from the antiferroelectric ground state to two ferroelectric states (with ±𝑃 ).…”

mentioning

confidence: 52%

Strong Coupled Magnetic and Electric Ordering in Monolayer of Metal Thio(seleno)phosphates

Hua

Bai

Zheng

et al. 2021

Chinese Phys. Lett.

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The coupling between electric ordering and magnetic ordering in two-dimensional (2D) materials is important for both fundamental research of 2D multiferroics and future development of magnetism-based information storage and operation. Here, we introduce a scheme for realizing a magnetic phase transition through the transition of electric ordering. We take CuMoP2S6 monolayer as an example, which is a member of the large 2D transition-metal chalcogen-phosphates family. Based on first-principles calculations, we find that it is a multiferroic with unprecedented characters, namely, it exhibits two different phases: an antiferroelectric-antiferromagnetic phase and a ferroelectric-ferromagnetic phase, in which the electric and magnetic orderings are strongly coupled. Importantly, the electric polarization is out-of-plane, so the magnetism can be readily switched by using the gate electric field. Our finding reveals a series of 2D multiferroics with special magnetoelectric coupling, which hold great promise for experimental realization and practical applications.

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mentioning

confidence: 52%

Strong Coupled Magnetic and Electric Ordering in Monolayer of Metal Thio(seleno)phosphates

Hua

Bai

Zheng

et al. 2021

Chinese Phys. Lett.

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“…While the second stage (approximately 1954 to now) mainly focuses on the macroscopic crystalline materials of component heterogeneous distribution, specifically the random distribution of some kinds of elements on the crystal lattice (no symmetry of space translation), also known as the crystals of component random distribution, such as lead magnesium niobate [7][8][9][10] and barium zirconate titanate [11,12] of ferroelectrics (including relaxorferroelectrics and dipole glasses), as well as gold iron, [13] bismuth manganese scandate [14,15] of ferromagnets (including relaxor-ferromagnets and spin glasses), etc. [16][17][18][19][20] After the first stage of researches, a gradually mature theoretical system for ferroelectric and ferromagnetic phase transitions in the crystals of uniformly distributed components has been established, including the phenomenological theories (Weiss molecular field theory, [21,22] Landau theory, [23] Devonshire theory, [24][25][26] etc. ), and the microscopic models (Ising model, [27] Heisenberg model, [28] etc.)…”

Section: Introductionmentioning

confidence: 99%

“…), and the microscopic models (Ising model, [27] Heisenberg model, [28] etc.) as well as the corresponding solution methods (Weiss mean field, [22] Bethe mean field, [29] matrix transformation, [30,31] Wilson momentum space renormalization group theory, [32] and Kadanoff position space renormalization group theory [33] ).…”

Section: Introductionmentioning

confidence: 99%

Comparative study on phase transition behaviors of fractional molecular field theory and random-site Ising model

Liu 刘,

Zhao 赵,

Wang 王

et al. 2024

Chinese Phys. B

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Fractional molecular field theory (FMFT) is a phenomenological theory that describes phase transitions in crystals with randomly distributed components, such as the relaxor-ferroelectrics and spin glasses. In order to verify the feasibility of this theory, this paper fits it to the Monte Carlo simulations of specific heat and susceptibility vs temperature of two-dimensional random-site Ising model (2D-RSIM). The results indicate that FMFT deviates from 2D-RSIM significantly. The main reason for the deviation is that 2D-RSIM is a typical system of component random distribution, where the real order parameter is spatially heterogeneous and has no symmetry of space translation, but the basic assumption of FMFT means that the parameter is spatially uniform and has symmetry of space translation.

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“…However, for large-scale contact, when the roughness is small, the relationship between the real contact area and the normal load is nonlinear. [21,22] Rubinstein et al [5] believed that for the contact of the surface with small roughness (RMS < 0.1 µm), the nonlinear phenomenon might be related to the evanescent wave, and the measurement error of contact area would be caused by the tunneling effect [27] of light when the real contact area was measured based on the total reflection method. Different from the analysis of Rubinstein et al, Matsuda et al [24,25] compared the effects of vacuum, dry and wet environment on real contact area, and found that the relationship between real contact area and normal load would be related to the existence of fluid between contact interface.…”

Section: Introductionmentioning

confidence: 99%

Experimental analysis of interface contact behavior using a novel image processing method*

Han¹,

Luo²,

Zhang³

et al. 2021

Chinese Phys. B

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The spatial and temporal evolution of real contact area of contact interface with loads is a challenge. It is generally believed that there is a positive linear correlation between real contact area and normal load. However, with the development of measuring instruments and methods, some scholars have found that the growth rate of real contact area will slow down with the increase of normal load under certain conditions, such as large-scale interface contact with small roughness surface, which is called the nonlinear phenomenon of real contact area. At present, there is no unified conclusion on the explanation of this phenomenon. We set up an experimental apparatus based on the total reflection principle to verify this phenomenon and analyze its mechanism. An image processing method is proposed, which can be used to quantitative analysis micro contact behaviors on macro contact phenomenon. The weighted superposition method is used to identify micro contact spots, to calculate the real contact area, and the color superimposed image is used to identify micro contact behaviors. Based on this method, the spatiotemporal evolution mechanism of real contact area nonlinear phenomena is quantitatively analyzed. Furthermore, the influence of nonlinear phenomenon of real contact area on the whole loading and unloading process is analyzed experimentally. It is found that the effects of fluid between contact interface, normal load amplitude and initial contact state on contact behavior cannot be ignored in large-scale interface contact with small roughness surface.

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A New Model of Ferroelectric Phase Transition with Neglectable Tunneling Effect*

Cited by 4 publications

References 41 publications

Strong Coupled Magnetic and Electric Ordering in Monolayer of Metal Thio(seleno)phosphates

Strong Coupled Magnetic and Electric Ordering in Monolayer of Metal Thio(seleno)phosphates

Comparative study on phase transition behaviors of fractional molecular field theory and random-site Ising model

Experimental analysis of interface contact behavior using a novel image processing method*

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