Emergence of Kondo lattice behavior in a van der Waals itinerant ferromagnet, Fe₃GeTe₂.

ABSTRACT: Searching for heavy fermion (HF) states in non-f-electron systems becomes an interesting issue, especially in the presence of magnetism, and can help explain the physics of complex compounds. Using angle-resolved photoemission spectroscopy, scanning tunneling microscopy, physical properties measurements, and the first-principles calculations, we observe the HF state in a 3d-electron van der Waals ferromagnet, Fe₃GeTe₂. Upon entering the ferromagnetic state, a massive spectral weight transfer occurs, which results from the exchange splitting. Meanwhile, the Fermi surface volume and effective electron mass are both enhanced. When the temperature drops below a characteristic temperature T*, heavy electrons gradually emerge with further enhanced effective electron

SUBMITTER: Zhang Y 

PROVIDER: S-EPMC5770166 | biostudies-literature | 2018 Jan

REPOSITORIES: biostudies-literature