低维原子/分子晶体材料的可控生长、物性调控和原理性应用  

Construction, physical properties and applications of low-dimensional atomic/molecular crystals

作　　者：黄立[1,2] 李更 张余洋 鲍丽宏 郇庆[1,2] 林晓[2,1] 王业亮 郭海明[1,2] 申承民 杜世萱 高鸿钧[1,2] Huang Li;Li Geng;Zhang Yu-Yang;Bao Li-Hong;Huan Qing;Lin Xiao;Wang Ye-Liang;Guo Hai-Ming;Shen Cheng-Min;Du Shi-Xuan;Gao Hong-Jun(Nanoscale Physics and Devices Laboratory, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;（School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China)

机构地区：[1]中国科学院物理研究所纳米物理与器件实验室,北京100190 [2]中国科学院大学物理科学学院,北京100049

出　　处：《物理学报》2018年第12期94-118,共25页Acta Physica Sinica

摘　　要：本文介绍了高鸿钧课题组在物理所20年来的部分代表性工作.研究的主要方向为低维纳米功能材料的分子束外延可控制备、生长机制、物性调控及其在未来信息技术中的原理性应用.从材料的可控制备入手,结合第一性原理的理论计算,阐明材料生长机制和结构与物性的关系,进而实现物性调控和原理性应用.主要内容有:1)纳米尺度"海马"分形结构的形成及其生长机制;2)STM分辨率的提高及最高分辨Si(111)-7×7原子图像的获得;3)固体表面上功能分子的吸附、组装及其机制;4)稳定、重复、可逆的纳米尺度电导转变与超高密度信息存储;5)固体表面上单分子自旋态的量子调控及其原理性应用;6)原子尺度上朗德g因子的空间分辨及其空间分布不均匀性的发现;7)晶圆尺寸、高质量、单晶石墨烯的制备及原位硅插层绝缘化;8)几种新型二维原子晶体材料的可控构筑及其物性调控;9)"自然图案化"的新型二维原子晶体材料及其功能化.这些工作为低维量子结构的构造、物性调控及其原理性应用奠定了基础.In this article, we review the representative work that has been done by Hong-Jun decades in Institute of Physics, Chinese Academy of Sciences. The work focuses on the Gao＇s group in the past two construction, properties and applications of low-dimensional atomic/molecular crystals, covering the following 3 aspects 1） Construction and growth mechanisms of low-dimensional quantum structures. Firstly, we demonstrate the fab- rication and growth mechanism of a seahorse shaped fractal pattern in C60-TCNQ multilayer thin films by using the ionized-cluster-beam method. Secondly, by modifying the tip of the scanning tunneling microscope （STM）, we clearly resolve the six rest atoms and twelve adatoms on a Si（111）-7 × 7 unit cell, showing the ＂highest-resolution＂ STM images of the Si（111）-7 × 7 surface. According to this work, we investigate the adsorption and bonding of Ge atoms on Si（111）-7 × 7 at low coverages. The configurations and growth behaviors of iron phthalocyanine molecules on Au（111） surface from sub-monolayer to bilayer are also reviewed. Furthermore, we demonstrate that organic molecules bond preferentially to different facets of the Ag（775） substrate under different deposition sequences, molecular lengths, terrace widths, and step heights. This can contribute to the design of non-templated selective functionalization of nanocrystals 2） Reversible conductance transition and spin on-off in low-dimensional quantum structures and applications in ultrahigh-density information storage. Firstly, we implement reversible, erasable, and rewritable nano-recordings on molecular thin films as a result of conductance transition. Then we demonstrate that the Kondo resonance of iron ph- thalocyanine molecules on an Au（111） substrate depends strongly on adsorption configuration, and the Kondo resonance of manganese phthalocyanine molecules can reversibly switch ON and OFF via attachment and detachment of single hydrogen atom to the molecule. Moreover, we achieve the site-dependent g

关 键 词：低维纳米结构 二维原子晶体材料 功能分子 扫描隧道显微学 

分 类 号：O78[理学—晶体学]