TY  - JOUR
AU  - Raczkowski, Marcin
AU  - Assaad, Fakher F.
TI  - Emergent Coherent Lattice Behavior in Kondo Nanosystems
JO  - Physical review letters
VL  - 122
IS  - 9
SN  - 1079-7114
CY  - College Park, Md.
PB  - APS
M1  - FZJ-2020-03852
SP  - 097203
PY  - 2019
AB  - 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.
LB  - PUB:(DE-HGF)16
DO  - DOI:10.1103/PhysRevLett.122.097203
UR  - https://juser.fz-juelich.de/record/885469
ER  -