铅量子薄膜中量子通道、界面结构和超导的原位电子输运研究

项目名称： 铅量子薄膜中量子通道、界面结构和超导的原位电子输运研究

项目编号： No.11474261

项目类型： 面上项目

立项/批准年度： 2015

项目学科： 数理科学和化学

项目作者： 秦胜勇

作者单位： 中国科学技术大学

项目金额： 90万元

中文摘要： 低维量子体系的研究和应用在过去几十年间取得了巨大的发展并且对基于电子学和自旋电子学等技术的发展起了重要的作用。其中铅量子薄膜材料由于其展示出多种新奇的量子效应引起人们广泛的兴趣。然而，电子输运方面尤其是原位电子输运方面的研究却非常缺乏，导致该材料体系的一些科学问题得不到圆满解决，甚至一些基本物理现象还存在争议。本研究将围绕原位电子输运测量进行，同时结合扫描隧道显微镜和扫描隧道谱，主要研究不同量子通道、衬底界面、表面电导和原子台阶边界对电子输运的影响；以及二维超导体中局部电子对和超导的长程有序性间的内在关联。希望对二维量子材料中的电子输运有更进一步的认识，并发现其一般规律，推动在现有材料基础上进一步发展新功能和应用。

中文关键词： 电子输运；量子尺寸效应；薄膜；超导

英文摘要： The research and application of low-dimensional quantum systems have made tremendous advancement in the last few decades and it has since played important roles in the development of electronics and spintronics technologies. Among those, Pb quantum thin films have displayed many novel quantum phenomena and attracted huge attentions. However, the in-situ electron transport study is still lacking, which has limited the understanding of this quantum system, and some physical phenomena remained controversial and awaiting to be resolved. This proposal will be focusing on the in-situ electron transport studies, combining scanning tunneling microscopy/spectroscopy measurements, and try to understand the effects of different quantum channels, substrate interfaces, surface conductance, and atomic steps on the electron transport; as well as the correlations between local electron paring and long range ordering in the two-dimensional superconductivity. Try to improve the understanding of the electron transport of the two-dimensional quantum materials and discover the underlying principles, and develop the new functions and applications based on current materials.

英文关键词： Electron Transport;Quantum Size Effect;Thin Film;Superconductivity