Quantum Engineered Kondo Lattices

Abstract

Recent advances in atomic manipulation techniques have provided a novel bottom-up approach to investigating the unconventional properties and complex phases of strongly correlated electron materials. By engineering artificial condensed matter systems containing tens to thousands of atoms with tailored electronic or magnetic properties, it has become possible to explore how quantum many-body effects---whose existence lies at the heart of strongly correlated materials---emerge as the size of a system is increased from the nanoscale to the mesoscale. Here we investigate both theoretically and experimentally the quantum engineering of nanoscopic Kondo lattices -- Kondo droplets -- that exemplify nanoscopic replicas of heavy-fermion materials. We demonstrate that by changing a droplet's real space geometry, it is possible to not only create coherently coupled Kondo droplets whose properties asymptotically approach those of a quantum-coherent Kondo lattice, but also to markedly increase or decrease the droplet's Kondo temperature. Furthermore we report on the discovery of a new quantum phenomenon -- the Kondo echo -- a signature of droplets containing Kondo holes functioning as direct probes of spatially extended, quantum-coherent Kondo cloud correlations.

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Cited by in corpus (11)

• Designer quantum states of matter created atom-by-atom
• Engineering interfacial quantum states and electronic landscapes by molecular nanoarchitectures
• The fate of the Kondo cloud in a superconductor
• Zooming in on heavy fermions in Kondo lattice models
• Visualizing the atomic-scale origin of metallic behavior in Kondo insulators
• Phase diagram and dynamics of the SU($\mathbf{N}$) symmetric Kondo lattice model
• Band gap formation in commensurate twisted bilayer graphene/hBN moiré lattices
• Structural and electrical characterization of the monolayer Kondo-lattice compound CePt${}_6$/Pt(111)
• Tuning spinaron and Kondo resonances via quantum confinement
• SU($\mathbf{N}$) Kondo-Heisenberg chain: Phase diagram, Ising criticality, and the coexistence of heavy quasiparticles and valence bond solid order
• Probing nonlocal correlations in magnetic rare-earth clusters