Nonlinear optical response in Mott insulators
Nonlinear optical response in Mott insulators
复制标题
莫特绝缘体中的非线性光学响应
DOI：
10.1016/s0022-2313(01)00357-x
复制
发表时间：
2001
影响因子：
3.6
通讯作者：
S. Maekawa
中科院分区：
文献类型：
--
作者：
T. Tohyama;S. Maekawa
本文从理论上研究了一维Mott绝缘体的非线性光学响应和光激发态。我们发现，自旋-电荷分离和大的在位库仑相互作用在获得简并偶极允许态和偶极禁戒态的光激发态中起着至关重要的作用。基于这个结果，我们提出了一个holon-doublon模型。计算的非线性光学极化率再现实验数据非常好的一维绝缘铜氧化物。
We theoretically study nonlinear optical response and photoexcited states of the Mott insulators in one dimension (1D). We find that the spin-charge separation and large on-site Coulomb interaction play a crucial role in obtaining degenerate dipole-allowed and dipole-forbidden states in the photoexcited states. Based on this result, we propose a holon–doublon model. The calculated nonlinear optical susceptibilities reproduce experimental data very well for 1D insulating cuprates.