Molecular Beam Epitaxy Growth and Electronic Structures of Monolayer GdTe$_{3}$
Zhilin Xu1, Shuai-Hua Ji1,2, Lin Tang1, Jian Wu1,2, Na Li3*, Xinqiang Cai1*, and Xi Chen1,2
1State Key Laboratory of Low Dimensional Quantum Physics and Department of Physics, Tsinghua University, Beijing 100084, China 2Frontier Science Center for Quantum Information, Beijing 100084, China 3Key Laboratory for the Physics and Chemistry of Nanodevices, Department of Electronics, Peking University, Beijing 100871, China
Abstract：GdTe$_{3}$ is a layered antiferromagnetic (AFM) metal with charge density wave (CDW). We grew monolayer (ML) GdTe$_{3}$ on graphene/6H-SiC(0001) substrates by molecular beam epitaxy. The electronic and magnetic structures are studied by scanning tunneling microscopy/spectroscopy, quasi-particle interference (QPI) and first-principles calculations. Strong evidence of CDW persisting at the two-dimensional (2D) limit is found. Band dispersions and partially gapped energy bands near the Fermi surface are revealed by the QPI patterns. By density functional theory $+ U$ calculations, AFM order with stripe pattern is found to be the magnetic ground state for ML GdTe$_{3}$. These results provide fundamental understanding and pave the way for further investigation of GdTe$_{3}$ at the 2D limit.
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2021, Vol. 38 
