Modulation of Kondo Behavior in a Two-Dimensional Epitaxial Bilayer Bi(111)/Fe<sub>3</sub>GeTe<sub>2</sub> Moiré Heterostructure.
basic_science · Level V
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- Record sourced from PubMed, PMID 39136292.
- Also identified by DOI 10.1021/acsnano.4c04271.
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Abstract
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<sub>3</sub>GeTe<sub>2</sub> 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.