论文标题
手性晶体中的旋转和电场响应以及绝对对映选择
Rotation and electric-field responses and absolute enantioselection in chiral crystals
论文作者
论文摘要
研究了手性的微观起源以及可能的电场诱导的旋转和旋转场诱导的电化极化。通过在对称性辅助基础上构建元素TE晶体的逼真的紧密结合模型，我们确定了具有相同时间反向特性的极性和轴向向量之间手性的显微镜和必需耦合。基于这个微观模型，我们定量地阐明了由最近的邻二旋转依赖性虚构跳跃驱动的带间过程是电场诱导的旋转及其反响应的关键因素。从对称的角度来看，这些耦合是任何手性材料常见的特征，导致可能通过同时应用电场和旋转场，磁场和电流等实现实验方法，以实现绝对的对映射，等等。
Microscopic origin of chirality and possible electric-field induced rotation and rotation-field induced electric polarization are investigated. By building up a realistic tight-binding model for elemental Te crystal in terms of symmetry-adopted basis, we identify the microscopic origin of the chirality and essential couplings among polar and axial vectors with the same time-reversal properties. Based on this microscopic model, we elucidate quantitatively that the inter-band process, driven by the nearest-neighbor spin-dependent imaginary hopping, is the key factor in the electric-field induced rotation and its inverse response. From the symmetry point of view, these couplings are characteristic common to any chiral material, leading to a possible experimental approach to achieve absolute enantioselection by simultaneously applied electric and rotation fields, or magnetic field and electric current, and so on, as a conjugate field of the chirality.
