Interfacial proximity and interplay between Kondo and short-range magnetic correlations in heterostructures
arxiv(2024)
摘要
In this work, we investigate the influence of interlayer distance in a
heterostructure containing both Kondo effects and short-range magnetic
correlations. Our proposed heterostructure comprises three coupled square
lattice layers. The first layer is governed by the Kondo-Heisenberg lattice
model involving f- and d-electrons, which interact via Kondo and Heisenberg
couplings, J_K and J_H, respectively. The other two layers consist of
non-interacting itinerant electrons, where coupling with the first layer is
determined by two perpendicular hopping parameters. We find that varying the
interlayer couplings induces electronic dynamics at the interface, altering the
behavior of mean-field parameters describing the Kondo effect and short-range
magnetic correlations. The system's temperature - interlayer hopping parameter
phase diagram exhibits a sequence of discontinuous and continuous transitions.
In the cases, |J_K|<|J_H| and |J_K|>|J_H| rich phase diagrams are
found which include Kondo, ferromagnetic and antiferromagnetic correlations.
Our work provides insights into hosting Kondo correlations in heterostructures.
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