Kondo Holes in the Two-Dimensional Itinerant Ising Ferromagnet Fe3GeTe2
Publication Name
Nano Letters
Abstract
Heavy Fermion (HF) states emerge in correlated quantum materials due to the intriguing interplay between localized magnetic moments and itinerant electrons but rarely appear in 3d-electron systems due to high itinerancy of d-electrons. Here, an anomalous enhancement of Kondo screening is observed at the Kondo hole of local Fe vacancies in Fe3GeTe2 which is a recently discovered 3d-HF system featuring Kondo lattice and two-dimensional itinerant ferromagnetism. An itinerant Kondo-Ising model is established to reproduce the experimental results and provides insight into the competition between Ising ferromagnetism and Kondo screening. Our work explains the microscopic origin of the d-electron HF states in Fe3GeTe2 and inspires future studies of the enriched quantum many-body effects with Kondo holes.
Open Access Status
This publication may be available as open access
Volume
21
Issue
14
First Page
6117
Last Page
6123
Funding Number
DP170101467
Funding Sponsor
National Cancer Institute