Co/PbTe(111)界面X光电子能谱研究  

X-ray Photoelectron Spectroscopy Study of Co/Pbte(111)Interface

作　　者：姚育鹏 唐曙锋 潘媛媛 郑双羽 李培泽 王舒凯 蔡梦婷 牛逸潇 吴海飞[1] YAO Yupeng;TANG Shufeng;PAN Yuanyuan;ZHENG Shuangyu;LI Peize;WANG Shukai;CAI Mengting;NIU Yixiao;WU Haifei(Department of Physics,Shaoxing University,Shaoxing,Zhejiang 312000)

机构地区：[1]绍兴文理学院数理信息学院,浙江绍兴312000

出　　处：《绍兴文理学院学报》2020年第8期73-77,共5页Journal of Shaoxing University

基　　金：国家级大学生创新创业训练计划项目“基于Sn缓冲层的高质量SnSe薄膜制备及其热电性质研究”(201910349015)。

摘　　要：磁性材料可在无磁场条件下实现对非磁性半导体的自旋注入,实现电子学、光子学和磁学三者的最终融合,从而提升现有器件的功能.首先利用分子束外延技术在新鲜解离的BaF 2(111)表面制备高质量的以Pb为截止面的PbTe(111)薄膜,在此基础上,进行磁性金属Co的沉积,结果表明Co在PbTe(111)薄膜表面沉积的初始阶段(θ≤0.35 ML),Co原子向PbTe(111)薄膜内部发生扩散,以间隙位的方式形成PbCoTe合金;当Co沉积厚度θ>0.35 ML时,Co原子在PbTe(111)薄膜表面以金属Co团簇的方式成核生长.Magnetic materials can realize the spin injection of non-magnetic semiconductors in the absence of magnetic field,and lead to the final integration of electronics,photonics and magnetism,thereby enhancing the function of existing devices.In this paper,the high quality Pb-terminated PbTe(111)films were prepared on the freshly dissociated BaF 2(111)substrate by molecular beam epitaxy(MBE),and then,the deposition of magnetic metal Co was carried out.The results show that at the initial deposition of Co on the surface of PbTe(111)film(θ≤0.35 ML),Co atoms diffuse into the PbTe(111)film at the interstitial sites,forming PbCoTe alloys;when the Co deposition is more than 0.35 ML,Co atoms nucleate on the surface of PbTe(111)film as metallic Co clusters.

关 键 词：Co/PbTe 异质结 分子束外延 X光电子能谱 

分 类 号：O484.1[理学—固体物理] O484.5[理学—物理]