Moirésuperlattice modulations in single-unit-cell FeTe films grown on NbSe_(2)single crystals  

作　　者：Han-Bin Deng Yuan Li Zili Feng Jian-Yu Guan Xin Yu Xiong Huang Rui-Zhe Liu Chang-Jiang Zhu Limin Liu Ying-Kai Sun Xi-Liang Peng Shuai-Shuai Li Xin Du Zheng Wang Rui Wu Jia-Xin Yin You-Guo Shi Han-Qing Mao 邓翰宾;李渊;冯子力;关剑宇;于鑫;黄雄;刘睿哲;朱长江;刘立民;孙英开;彭锡亮;李帅帅;杜鑫;王铮;武睿;殷嘉鑫;石友国;毛寒青(Beijing National Laboratory for Condensed Matter Physics and Institute of Physics,Chinese Academy of Sciences,Beijing 100190,China;School of Physics,University of Chinese Academy of Sciences,Beijing 100049,China;Songshan Lake Materials Laboratory,Dongguan 523808,China;Laboratory for Topological Quantum Matter and Spectroscopy(B7),Department of Physics,Princeton University,Princeton,NJ 08544,USA;Center of Materials Science and Optoelectronics Engineering,University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]Beijing National Laboratory for Condensed Matter Physics and Institute of Physics,Chinese Academy of Sciences,Beijing 100190,China [2]School of Physics,University of Chinese Academy of Sciences,Beijing 100049,China [3]Songshan Lake Materials Laboratory,Dongguan 523808,China [4]Laboratory for Topological Quantum Matter and Spectroscopy(B7),Department of Physics,Princeton University,Princeton,NJ 08544,USA [5]Center of Materials Science and Optoelectronics Engineering,University of Chinese Academy of Sciences,Beijing 100049,China

出　　处：《Chinese Physics B》2021年第12期131-135,共5页中国物理B（英文版）

基　　金：Project supported by the National Key Research and Development Program of China(Grant Nos.2016YFA0302400,2016YFA0300602,and2017YFA0302903);the National Natural Science Foundation of China(Grant No.11227903);the Beijing Municipal Science and Technology Commission,China(Grant Nos.Z181100004218007 and Z191100007219011);the National Basic Research Program of China(Grant No.2015CB921304);the Strategic Priority Research Program of Chinese Academy of Sciences(Grant Nos.XDB07000000,XDB28000000,and XDB33000000)。

摘　　要：Interface can be a fertile ground for exotic quantum states,including topological superconductivity,Majorana mode,fractal quantum Hall effect,unconventional superconductivity,Mott insulator,etc.Here we grow single-unit-cell(1UC)FeTe film on NbSe_(2)single crystal by molecular beam epitaxy(MBE)and investigate the film in-situ with a home-made cryogenic scanning tunneling microscopy(STM)and non-contact atomic force microscopy(AFM)combined system.We find different stripe-like superlattice modulations on grown FeTe film with different misorientation angles with respect to NbSe_(2)substrate.We show that these stripe-like superlattice modulations can be understood as moirépattern forming between FeTe film and NbSe_(2)substrate.Our results indicate that the interface between Fe Te and NbSe2 is atomically sharp.By STM-AFM combined measurement,we suggest that the moirésuperlattice modulations have an electronic origin when the misorientation angle is relatively small(≤3°)and have structural relaxation when the misorientation angle is relatively large(≥10°).

关 键 词：scanning tunneling microscopy(STM) atomic force microscopy(AFM) FeTe film moirésuperlattice MISORIENTATION 

分 类 号：O469[理学—凝聚态物理]