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°).
作者
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
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(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)
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)。