本项目计划以最近引起广泛关注的5d过渡金属氧化物为研究对象，重点研究其中电子强关联效应和自旋- - 轨道耦合的相互影响及导致的新奇物理性质。我们将在理论上研究自旋- - 轨道耦合在决定关联电子系统电子结构中的作用， 揭示5d过渡金属氧化物系统中可能出现的新奇量子相，研究各种量子相之间的竞争或共存，阐明其相变机理,以理解实验揭示出的若干5d过渡金属氧化物中的新奇物性。针对不同的母体电子态，研究相应的掺杂系统的电荷和自旋动力学性质，揭示其电荷和自旋激发特征，从理论上探索在5d材料中实现超导的可能性，并与铁基、铜基超导性质进行对比，以期加深对一类强关联超导机理的认识。

In this project, we will study the 5d transition metal oxides,which have recently attracted considerable interest. We will focus on the effects of the interplay between the strong correlation effects and the spin-orbital couplings on the physical properties of materials. To understand the novel physical properties of the 5d transition metal oxides revealed by experiments, we will theoretically study the effects of the spin-orbital couplings in determining the electonic structures of the strong correlation systems, make known about several novel quantum phases and the competiion or coexistence of them in the 5d transition metal oxides, and clarify the mechanism of the phase transitions. Then, we will study the charge and spin dynamics of the doped systems for the different parent electronic states to reveal the characteristic of the charge and spin excitations. And, based on these studies, we will theoretically research the possibility of superconductivity in 5d materials and make a comparision with iron-based and cuprate superconductors to give a depth understanding of the superconducting mechanism in some strong correlation systems.