Lattice Relaxation Dynamics of Excitons and Elementary Nonlinear Processes in Photoinduced Structural Phase Transitions - Aggregation, Growth and Proliferation -
Lattice Relaxation Dynamics of Excitons and Elementary Nonlinear Processes in Photoinduced Structural Phase Transitions - Aggregation, Growth and Proliferation -
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激子的晶格弛豫动力学和光致结构相变中的基本非线性过程 - 聚集、生长和增殖 -
DOI：
10.1143/jpsj.69.1543
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发表时间：
2000
影响因子：
1.7
通讯作者：
K. Nasu
中科院分区：
文献类型：
--
作者：
H. Mizouchi;K. Nasu
从理论上讲，我们研究了光生成单激子的晶格弛豫动力学，该动态最终导致宏观结构域在绝缘固体中。尤其是，我们专注于该领域形成的三个基本非线性过程，我们称之为聚集，生长和增殖。该域形成现象通常称为“光诱导的结构相变”（PSPT）。在这三个基本过程中，激子不留在单个绝热的潜在表面内，而是在不同潜在的势能之间脱节。因此，全量子机械处理是必不可少的。作为这种类型相变的模型之一，我们考虑了许多激烈的激子 - Einstein声子系统。这是我们的相关系统。我们还假设该系统与均匀和奇数储层模式以及光子进行交互。偶数模式与爱因斯坦的声子线性耦合并消散其能量，而奇数模式将线性与激子和非...进行线性融合。
We theoretically study the lattice relaxation dynamics of a photogenerated single exciton which finally results in a macroscopic domain in insulating solids. Especially, we focus on three elementary nonlinear processes of this domain formation, which we call aggregation, growth and proliferation. This domain formation phenomenon is usually called `photoinduced structural phase transition' (PSPT). In these three elementary processes, the exciton does not stay within a single adiabatic potential surface but transits diabatically between the different potential ones. Hence, the full-quantum-mechanical treatment is indispensable. As one of the models for this type of phase transition, we consider a strongly coupled many exciton-Einstein phonon system. This is our relevant system. We also assume this system to interact with even and odd reservoir modes as well as photons. The even modes couple linearly with Einstein phonons and dissipate their energies, while the odd modes couple linearly with excitons and non...