锡烯生长中合金化的同步辐射光电子能谱研究  

Synchrotron radiation photoemission spectroscopy study on the phenomenon of alloying during stanene growth

作　　者：赵磊 刘晨 王晓宁 乌拉木·吐尔洪江 李金梅 赵佳丽 郭宇轩 钱海杰[1] 奎热西·依布拉欣[1] 王嘉鸥[1] ZHAO Lei;LIU Chen;WANG Xiaoning;Gholam Turghunjan;LI Jinmei;ZHAO Jiali;GUO Yuxuan;QIAN Haijie;Ibrahim Kurash;WANG Jiaou(Institute of High Energy Physics,Chinese Academy of Sciences,Beijing 100049,China;University of Chinese Academy of Sciences,Beijing 100049,China;Beijing Huaneng Xinrui Control Technology Co.,Ltd.,Beijing 100053,China;Xiamen University,Xiamen 361005,China)

机构地区：[1]中国科学院高能物理研究所,北京100049 [2]中国科学院大学,北京100049 [3]北京华能新锐控制技术有限公司,北京100053 [4]厦门大学,厦门361005

出　　处：《核技术》2020年第7期7-14,共8页Nuclear Techniques

基　　金：国家自然科学基金(No.11575227、No.11375228)资助。

摘　　要：锡烯作为新型的二维材料由于其预测的优异特性受到广泛关注,锡烯在生长过程中与衬底间的相互作用是该体系研究的重要课题。本文采用分子束外延法在平整有序的Au(111)表面沉积Sn元素制备锡烯,利用原位条件下的低能电子衍射(Low Energy Electron Diffraction,LEED)和同步辐射光电子能谱(Synchrotron Radiation Photoemission Spectroscopy,SR-PES)对不同覆盖度的样品表面进行分析,系统地研究了超高真空环境下锡烯在Au(111)表面的形成过程。结果表明:Sn原子先与Au(111)衬底发生强相互作用形成合金,随着生长厚度的增加,逐步形成锡烯并覆盖在合金表面。[Background]As a new type of two-dimensional material,stanene has received extensive attention,due to its predicted excellent properties.[Purpose]This study aims to explore interaction between stanene and substrate during its growth which is an important research topic.[Methods]First of all,stanene was successfully prepared on the Au(111)surface by molecular beam epitaxy.Then the surface states of the samples were characterized by in situ low energy electron diffraction(LEED)and synchrotron radiation photoemission spectroscopy(SR-PES)at different stages.[Results]The results of LEED measurements show that different surface reconstructions occur on the sample surface at different coverage during the growth.SR-PES results show that the Au 4f peak has 0.3 eV shift toward the higher binding energy,and the composition of stanene in the Sn 4d peak increases significantly.[Conclusions]Sn atoms strongly interact with Au(111)to form the alloy of Au2Sn,and with the increase of growth thickness,stanene gradually forms and covers the alloy surface.

关 键 词：锡烯 合金 低能电子衍射 同步辐射光电子能谱 

分 类 号：TL99[核科学技术—核技术及应用] O485[理学—固体物理]