Journal Article

FZJ-2020-03852

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Emergent Coherent Lattice Behavior in Kondo Nanosystems

Raczkowski, M. ; Assaad, F. F.

2019
APS College Park, Md.

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Please use a persistent id in citations: doi:10.1103/PhysRevLett.122.097203

Abstract: How many magnetic moments periodically arranged on a metallic surface are needed to generate a coherent Kondo lattice behavior? We investigate this fundamental issue within the particle-hole symmetric Kondo lattice model using quantum Monte Carlo simulations. Extra magnetic atoms forming closed shells around the initial impurity induce a fast splitting of the Kondo resonance at the inner shells, which signals the formation of composite heavy-fermion bands. The onset of the hybridization gap matches well the enhancement of antiferromagnetic spin correlations in the plane perpendicular to the applied magnetic field, a genuine feature of the coherent Kondo lattice. In contrast, the outermost shell remains dominated by a local Kondo physics with spectral features resembling the single-impurity behavior.

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Research Program(s):

1. 899 - ohne Topic (POF4-899) (POF4-899)
2. Numerical simulations of strongly correlated electron systems. (hwb03_20190501) (hwb03_20190501)

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