在磁性晶体的Spin-Seebeck效应中，多自由度耦合的非平衡动力学过程起着非常重要的作用，但计算非平衡电子、声子和磁振子的分布是一个非常困难的任务，主要问题在于非平衡概念和非平衡统计的基础性问题尚没有一般的解决方案。本项目拟通过引入温态统计方法对磁性晶格的Spin-Seebeck效应中的多自由度耦合的非平衡动力学进行研究，以揭示该效应的动力学和统计力学机制。项目通过Spin-Seebeck效应中磁振子-声子，磁振子-电子耦合的唯象模型和磁振子系统、声子系统和正常金属电子及其耦合作用的微观模型，对声子和磁振子在磁性晶格中的热流和自旋流的进行系统研究，从而揭示磁性晶格对正常金属的“自旋注入”自旋流的物理机制。本研究将为微纳尺度下的非平衡自旋电子学提供有益的理论探索，为加深非平衡动力学和非平衡统计的物理理解提供思路，也可对相关器件的设计提供理论指导。

It is very important that the non-equilibrium dynamical process with Muti-Degree-of-Freedom in the Spin-Seebeck effect of magnetic crystals. Nevertheless, it is very difficult that the study of the distributions of non-equilibrium electrons, phonons and magnons. To the author's knowledge, there are no general solutions for the basic problems of non-equilibrium concept and statistics, at least for now. The aim of this project is to study the non-equilibrium dynamics and statistics of the Spin-Seebeck effect with the temperature spectrum-statistic method. The project will be studied with two technical routes: One is to consider the couplings with phenomenological models; the other technical route is to consider the couplings with microscopic models. The Hamiltonian of the couplings of the phonons and magnons, the magnons and metal electrons, the phonons and electrons are to be studied. The density of states modified by the redistribution of temperatures and the energy current between various subsystems are to be studied with the current conservation equation. Finally, the spin current of the magnetic lattice and the spin “injection” from the magnetic lattice to the normal metal are to be studied. This study may reveal the rules and mechanisms of the magnon-phonon coupling on the Spin-Seebeck effect, and may provide non-equilibrium theorems on micro-nano-scales for Spintronics. At last but not least, may provide a theoretical guidance for the design of Spintronic devices.