论文标题
在多效Cu-Cl硼酸岩中解放域内的奴隶模式
Liberation of slave modes inside domain walls in multiferroic Cu-Cl boracite
论文作者
论文摘要
域壁（DWS）是对称性等效铁域之间的二维边界，由于其对新型逻辑和记忆设备的承诺而被积极研究。此外，由于其高迁移率和较大的电导率，它们可以很容易地以低能成本而以低能成本进行创建，擦除和重塑。到目前为止，大多数工作都集中在适当的铁电基因中的DW上，其中主要参数，铁电偏振，域中值之间的插值来通过还原为零（在ISING-type type dw）或旋转（Bloch Type DW）。在这里，我们提出了一个新的DW家族成员，在墙壁内具有从属阶参数的复杂内部纹理，其中主要阶参数将其降低到零。我们的第一原理衍生的模型预测了单极和环形极化模式的存在。结果使硼砂中复杂域模式的大规模相位场模拟能够激发基于不当铁电的域壁的新型设备。
Domain walls (DWs), the two-dimensional boundaries between symmetry equivalent ferroic domains, are actively investigated due to their promise for novel logic and memory devices. Moreover, they can be easily created, erased and reshaped at a low energy cost due to their high mobility and large electrical conductivity. Most work so far has been focused on DWs in proper ferroelectrics, where the primary order parameter, ferroelectric polarization, interpolates between the values in the domains by either reducing to zero (in Ising-type DW) or rotating (Bloch type DW). Here we present a new member of DW family with a complex inner texture of slave order parameters inside the wall where the primary order parameter reduces to zero. Our first-principles-derived model predicts the existence of monopolar and toroidal polarization patterns. The results enable large-scale phase field simulations of complex domain patterns in boracites and could inspire novel devices based on domain walls in improper ferroelectrics.
