Interplay between Kondo effect and Ruderman-Kittel-Kasuya-Yosida interaction

Abstract

The interplay between the Ruderman-Kittel-Kasuya-Yosida (RKKY) interaction and the Kondo effect is expected to provide the driving force for the emergence of many phenomena in strongly correlated electron materials. Two magnetic impurities in a metal are the smallest possible system containing all these ingredients and define a bottom up approach towards a long term understanding of concentrated / dense systems. Here we report on the experimental and theoretical investigation of iron dimers buried below a Cu(100) surface by means of low temperature scanning tunnelling spectroscopy (STS) combined with density functional theory (DFT) and numerical renormalization group (NRG) calculations. The Kondo effect, in particular the width of the Abrikosov-Suhl resonance, is strongly altered or even suppressed due to magnetic coupling between the impurities. It oscillates as function of dimer separation revealing that it is related to the RKKY interaction mediated by the conduction electrons. Simulations based on density functional theory support this concept showing the same oscillation period and trends in the coupling strength as found in the experiment.

References in corpus (25)

• Kondo Physics in a Single Electron Transistor
• A Tunable Kondo Effect in Quantum Dots
• The numerical renormalization group method for quantum impurity systems
• Quantum Criticality in Heavy Fermion Metals
• Mechanical Control of Spin States in Spin-1 Molecules and the Underscreened Kondo Effect
• The role of magnetic anisotropy in the Kondo effect
• Tunable Non-local Spin Control in a Coupled Quantum Dot System
• Theory of the Fano Resonance in the STM Tunneling Density of States due to a Single Kondo Impurity
• Energy resolution and discretization artefacts in the numerical renormalization group
• Manipulating Kondo Temperature via Single Molecule Switching
• Exchange interaction between single magnetic adatoms
• Temperature and magnetic field dependence of a Kondo system in the weak coupling regime
• Control of single-spin magnetic anisotropy by exchange coupling
• Long-range Kondo signature of a single magnetic impurity
• A Tunable Two-impurity Kondo system in an atomic point contact
• Hund's coupling and the metal-insulator transition in the two-band Hubbard model
• Kondo resonance narrowing in d- and f-electron systems
• Two-Site Kondo Effect in Atomic Chains
• Theory of real space imaging of Fermi surfaces
• Mapping Itinerant Electrons around Kondo Impurities
• Kondo resonance line-shape of magnetic adatoms on decoupling layers
• Spectral properties of the two-impurity Anderson model with varying distance and various interactions
• Signature of Fermi surface anisotropy in point contact conductance in the presence of defects
• Conductance of a tunnel point-contact of noble metals in the presence of a single defect
• The signature of subsurface Kondo impurities in the local tunnel current

Cited by in corpus (34)

• Probing Magnetic Excitations and Correlations in Single and Coupled Spin Systems with Scanning Tunneling Spectroscopy
• Exploring the phase diagram of the two-impurity Kondo problem
• Observation of spin-spin fermion-mediated interactions between ultracold bosons
• Upper and Lower Critical Decay Exponents of Ising Ferromagnets with Long-range Interaction
• Kondo versus indirect exchange: the role of the lattice and the actual range of RKKY interactions in real materials
• Quantum well states and amplified spin-dependent Friedel oscillations in thin films
• Kondo Destruction in RKKY-Coupled Kondo Lattice and Multi-Impurity Systems
• Natural Orbitals Renormalization Group Approach to the Two-Impurity Kondo Critical Point
• Multiple-scattering approach for multi-spin chiral magnetic interactions: Application to the one- and two-dimensional Rashba electron gas
• RKKY interaction in Rashba altermagnets
• Emergent Coherent Lattice Behavior in Kondo Nanosystems
• Chiral magnetism of magnetic adatoms generated by Rashba electrons
• Strong correlation effects in theoretical STM studies of magnetic adatoms
• Tuning a two-impurity Kondo system by a moiré superstructure
• ARPES signature of the competition between magnetic order and Kondo effect in CeCoGe3
• Nonlocal Andreev Reflections as a Source of Spin Exchange and Kondo Screening
• Friedel oscillations induced by magnetic skyrmions: from scattering properties to all-electrical detection
• First-principles investigation of spin wave dispersions in surface-reconstructed Co thin films on W(110)
• Effects of Interatomic Coupling on Magnetic Anisotropy and Order of Spins on Metallic Surfaces
• Doped Mott phase and charge correlations in monolayer 1T-NbSe${}_2$
• RKKY-like contributions to the magnetic anisotropy energy: 3d adatoms on Pt(111) surface
• Engineering the Kondo impurity problem with alkaline-earth atom arrays
• Selective generation and amplification of RKKY interactions by P-N interface
• Spin-1 two-impurity Kondo problem on a lattice
• Nonlocal orbital magnetism of 3d adatoms deposited on the Pt(111) surface
• Single-Co Kondo effect in atomic Cu wires on Cu(111)
• Asymmetry effects on the phases of RKKY-coupled two-impurity Kondo systems
• Signatures of electronic correlations and spin-susceptibility anisotropy in nuclear magnetic resonance
• Oscillation and suppression of Kondo temperature by RKKY coupling in two-site Kondo systems
• RKKY interaction in graphene at finite temperature
• Metallic layered materials with magnetic frustration: An ARPES view of the SmAuAl${}_4$Ge${}_2$ and TbAuAl${}_4$Ge${}_2$
• Scanning Tunneling Spectroscopy of Subsurface Ag and Ge Impurities in Copper
• The Role of the Magnetic Anisotropy in Atomic-Spin Sensing of 1D Molecular Chains
• On-chip quantum sensing of Kondo spins in a high-mobility quasi-one-dimensional nanoconstriction