Artificial superconducting Kondo lattice in a van der Waals heterostructure.

ABSTRACT: Engineering Kondo lattice with tailored functionality is desirable for elucidating the heavy fermion physics. We realize the construction of an artificial Kondo lattice/superconductor heterojunction by growing monolayer VSe₂ on bulk 2H-NbSe₂ with molecular beam epitaxy. Spectroscopic imaging scanning tunneling microscopy measurements show the emergence of a new charge density wave (CDW) phase with 3× 3 periodicity on the monolayer VSe₂. Unexpectedly, a pronounced Kondo resonance appears around the Fermi level, and distributes uniformly over the entire film, evidencing the formation of Kondo lattice. Density functional theory calculations suggest the existence of magnetic interstitial V atoms in VSe₂/NbSe₂, which play a key role in form

SUBMITTER: Fan K 

PROVIDER: S-EPMC11470022 | biostudies-literature | 2024 Oct

REPOSITORIES: biostudies-literature