层状钴氧化物Bi2Sr2Co2O8纳米结构的二维输运特性研究

项目名称： 层状钴氧化物Bi2Sr2Co2O8纳米结构的二维输运特性研究

项目编号： No.11304060

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 数理科学和化学

项目作者： 王阳

作者单位： 哈尔滨工业大学

项目金额： 30万元

中文摘要： 由于石墨烯等二维体系表现出许多新奇而独特的性质，近年来二维层状材料已成为科学研究的热点。由于二维材料在半导体器件、绿色能源、生物医学等方面具有广泛的应用前景，深入研究多种二维体系的性质具有重要的意义。本项目拟利用机械剥离的方法制备不同厚度的仅包含一个或几个原子层的层状钴氧化物Bi2Sr2Co2O8纳米片，系统研究该层状体系在二维尺度下的输运特性，并确定二维Bi2Sr2Co2O8的能带结构。通过这些研究，建立起其输运行为的物理图像，理解该二维层状材料的层内层间耦合作用、微结构与输运特性之间的关联，加深对低维体系独特的输运性质的认识。本项目可以为当前电子强关联系统和低维物理现象的研究提供新的信息，并为设计具有独特性能的低维量子器件提供物理依据。

中文关键词： 二维体系；层状结构；输运特性；电子强关联；

英文摘要： Since the discovery of graphene and related two-dimensional systems that exhibit many novel and special properties, study on two-dimensional layered materials has become a scientific hot topic recently. Due to the wide prospects in semiconductor devices, clean energy, and biomedicine, in-depth investigations on various two-dimensional systems are highly important. In this project, we plan to prepare nanosheets of the layered cobalt oxide Bi2Sr2Co2O8 with different thickness including one or a few atomic layers by mechanical exfoliation, and focus on their transport characteristics in the two-dimensional scale as well as determine their electronic band structure. From this study, we can establish the physical scenario of the transport behavior, understand the correlations between the in-layer and out-of-layer interactions, microstructure and transport characteristics, deepen the understanding of the particular transport properties in low-dimensional systems. This project can provide some new information for the study of electron strongly correlated systems and low-dimensional physical phenomena, and provide theoretical support for designing new low-dimensional quantum devices with special performance.

英文关键词： two-dimensional system；layered structure；transport characteristics；electron strong correlation；