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 stu...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.展开更多
Study of two-dimensional(2D)magnetic materials is important for both fundamental research and application.Here we report molecular beam epitaxy growth of iodides,candidates for exhibiting 2D magnetism.Decomposition of...Study of two-dimensional(2D)magnetic materials is important for both fundamental research and application.Here we report molecular beam epitaxy growth of iodides,candidates for exhibiting 2D magnetism.Decomposition of CrI_(3)is utilized to produce stable gaseous I_(2)flux.Growth of MnI_(2),GdI_(3),and CrI_(2)down to monolayer is successful achieved by co-depositing I2 and corresponding metal atoms.The thin films of the three materials are characterized by scanning tunneling microscope and found to be insulators with bandgaps of 4.4 e V,0.6 e V,and 3.0 e V,respectively.The film growth paves the way for further study of magnetic properties at the 2 D limit.展开更多
基金Supported by the National Natural Science Foundation of China(Grant Nos.11934001 and 11874233)the Science Challenge Project(Grant No.TZ2016004).
文摘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.
基金Project supported by the Science Challenge Project(Grant No.TZ2016004)。
文摘Study of two-dimensional(2D)magnetic materials is important for both fundamental research and application.Here we report molecular beam epitaxy growth of iodides,candidates for exhibiting 2D magnetism.Decomposition of CrI_(3)is utilized to produce stable gaseous I_(2)flux.Growth of MnI_(2),GdI_(3),and CrI_(2)down to monolayer is successful achieved by co-depositing I2 and corresponding metal atoms.The thin films of the three materials are characterized by scanning tunneling microscope and found to be insulators with bandgaps of 4.4 e V,0.6 e V,and 3.0 e V,respectively.The film growth paves the way for further study of magnetic properties at the 2 D limit.
