Modulation of Kondo Behavior in a Two-Dimensional Epitaxial Bilayer Bi(111)/Fe 3 GeTe 2 Moiré Heterostructure.
Yilian XiZhijian ShiMengting ZhaoNingyan ChengKunrong DuKeren LiHang XuShengjie XuJiaqi LiuHaifeng FengYan ShiXun XuWeichang HaoShixue DouYi DuPublished in: ACS nano (2024)
Artificial two-dimensional (2D) moiré superlattices provide a platform for generating exotic quantum matter or phenomena. Here, an epitaxial heterostructure composed of bilayer Bi(111) and an Fe 3 GeTe 2 substrate with a zero-twist angle is acquired by molecular beam epitaxy. Scanning tunneling microscopy and spectroscopy studies reveal the spatially tailored Kondo resonance and interfacial magnetism within this moiré superlattice. Combined with first-principles calculations, it is found that the modulation effect of the moiré superlattice originates from the interfacial orbital hybridization between Bi and Fe atoms. Our work provides a tunable platform for strong electron correlation studies to explore 2D artificial heavy Fermion systems and interface magnetism.
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