论文标题
二维抗抗抗铁缝线的外部电场的两极分化旋转，h $ _2 $ c $ _4 $ o $ _4 $
Polarization rotation by external electric field in two-dimensional antiferroelectric squaric acid, H$_2$C$_4$O$_4$
论文作者
论文摘要
开发了一种用于描述电场影响的伪单素模型，仅限于sublatice偏振平面，对二维方形酸性抗fififerroelectrics的影响。根据铁电和抗fiferroelectric Ordering的参数以及非共线性角度$θ$，这是Sublattice极化之间的角度，对系统行为进行了分析。构建了温度电场$ t-e_1 $相图。发现大多数场引起的过渡都与极化旋转有关。观察到的相分别包括分别具有分子的sublattices的近距离和垂直极化的共线铁电和非共线性铁晶。该图还包含两个区域，其中非共线性角度在名义上，0和90 $^\ circ $和90 $^\ circ $和180 $^\ circ $之间的非共线性角度不断变化。检测到$ t-e_1 $相图上的第一阶和二阶过渡线，超临界线，关键终点和关键点。
A pseudospin model for description of the influence of the electric field, confined to the plane of sublattice polarization, on the two-dimensional squaric acid antiferroelectrics is developed. The system behavior is analyzed in terms of the parameters of ferroelectric and antiferroelectric ordering, as well as the non-collinearity angle $θ$, which is the angle between sublattice polarizations. The temperature-electric field $T-E_1$ phase diagram is constructed. Most of the field-induced transitions are found to be associated with polarization rotation. The observed phases include the collinear ferroelectric and non-collinear ferrielectric with almost antiparallel and perpendicular polarizations of the sublattices, respectively. The diagram also contains two regions, where the non-collinearity angle varies continuously between, nominally, 0 and 90$^\circ$ and between 90$^\circ$ and 180$^\circ$. The first and second order transition lines, supercritical lines, critical end points, and critical points on the $T-E_1$ phase diagram are detected.
