Epitaxial growth of antimony nanofilms on HOPG and thermal desorption to control the film thickness  

作　　者：Shuya Xing Le Lei Haoyu Dong Jianfeng Guo Feiyue Cao Shangzhi Gu Sabir Hussain Fei Pang Wei Ji Rui Xu Zhihai Cheng 邢淑雅;雷乐;董皓宇;郭剑峰;曹飞跃;顾尚志;Sabir Hussain;庞斐;季威;许瑞;程志海(Beijing Key Laboratory of Optoelectronic Functional Materials&Micro-nano Devices,Department of Physics,Renmin University of China,Beijing 100872,China;CAS Key Laboratory of Standardization and Measurement for Nanotechnology,CAS Center for Excellence in Nanoscience,National Center for Nanoscience and Technology,Beijing 100190,China;University of Chinese Academy of Sciences,Beijing 100039,China)

机构地区：[1]Beijing Key Laboratory of Optoelectronic Functional Materials&Micro-nano Devices,Department of Physics,Renmin University of China,Beijing 100872,China [2]CAS Key Laboratory of Standardization and Measurement for Nanotechnology,CAS Center for Excellence in Nanoscience,National Center for Nanoscience and Technology,Beijing 100190,China [3]University of Chinese Academy of Sciences,Beijing 100039,China

出　　处：《Chinese Physics B》2020年第9期164-171,共8页中国物理B（英文版）

基　　金：Project supported by the National Natural Science Foundation of China(Grant Nos.21622304,61674045,11604063,and 61911540074);the National Key Research and Development Program of China(Grant No.2016YFA0200700);the Strategic Priority Research Program and Key Research Program of Frontier Sciences and Instrument Developing Project(Chinese Academy of Sciences,CAS)(Grant Nos.XDB30000000,QYZDB-SSW-SYS031,and YZ201418);Z.H.Cheng was supported by Distinguished Technical Talents Project and Youth Innovation Promotion Association CAS,the Fundamental Research Funds for the Central Universities,China;the Research Funds of Renmin University of China(Grant No.18XNLG01).

摘　　要：Group-V elemental nanofilms were predicted to exhibit interesting physical properties such as nontrivial topological properties due to their strong spin-orbit coupling,the quantum confinement,and surface effect.It was reported that the ultrathin Sb nanofilms can undergo a series of topological transitions as a function of the film thickness h:from a topological semimetal(h>7.8 nm)to a topological insulator(7.8 nm>h>2.7 nm),then a quantum spin Hall(QSH)phase(2.7 nm>h>1.0 nm)and a topological trivial semiconductor(h<1.0 nm).Here,we report a comprehensive investigation on the epitaxial growth of Sb nanofilms on highly oriented pyrolytic graphite(HOPG)substrate and the controllable thermal desorption to achieve their specific thickness.The morphology,thickness,atomic structure,and thermal-strain effect of the Sb nanofilms were characterized by a combination study of scanning electron microscopy(SEM),atomic force microscopy(AFM),and scanning tunneling microscopy(STM).The realization of Sb nanofilms with specific thickness paves the way for the further exploring their thickness-dependent topological phase transitions and exotic physical properties.

关 键 词：epitaxial growth antimony films scanning tunneling microscope(STM) thermal desorption 

分 类 号：TB383.1[一般工业技术—材料科学与工程]