Tuning emergent magnetism in a Hund's impurity

Abstract

The recently proposed theoretical concept of a Hund's metal is regarded as a key to explain the exotic magnetic and electronic behavior occuring in the strongly correlated electron systems of multiorbital metallic materials. However, a tuning of the abundance of parameters, that determine these systems, is experimentally challenging. Here, we investigate the smallest possible realization of a Hund's metal, a Hund's impurity, realized by a single magnetic impurity strongly hybridized to a metallic substrate. We experimentally control all relevant parameters including magnetic anisotropy and hybridization by hydrogenation with the tip of a scanning tunneling microscope and thereby tune it through a regime from emergent magnetic moments into a multi-orbital Kondo state. Our comparison of the measured temperature and magnetic field dependent spectral functions to advanced many-body theories will give relevant input for their application to non-Fermi liquid transport, complex magnetic order, or unconventional superconductivity.

References in corpus (29)

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• Continuous-time Monte Carlo methods for quantum impurity models
• High-temperature superconductivity in iron-based materials
• Correlated quantum phenomena in the strong spin-orbit regime
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• Strong electronic correlations from Hund's coupling
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• The coherence-incoherence crossover and the mass-renormalization puzzles in Sr2RuO4
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• Temperature and magnetic field dependence of a Kondo system in the weak coupling regime
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• Reversible Single Spin Control of Individual Magnetic Molecule by Hydrogen Atom Adsorption
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• Excitation of local magnetic moments by tunnelling electrons
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Cited by in corpus (41)

• Hund's rule-driven Dzyaloshinskii-Moriya interaction at 3d-5d interfaces
• Colloquium: Atomic spin chains on surfaces
• Thermoelectricity in correlated narrow-gap semiconductors
• Evidence for interfacial superconductivity in a bi-collinear antiferromagnetically ordered FeTe monolayer on a topological insulator
• Spin decoherence of magnetic atoms on surfaces
• Probing Magnetic Excitations and Correlations in Single and Coupled Spin Systems with Scanning Tunneling Spectroscopy
• Signatures of Mottness and Hundness in archetypal correlated metals
• Observation of hydrogen-induced Dzyaloshinskii-Moriya interaction and reversible switching of magnetic chirality
• Inducing skyrmions in ultrathin Fe films by hydrogen exposure
• Sub-molecular modulation of a 4f driven Kondo resonance by surface-induced asymmetry
• Kondo resonance of a Co atom exchange coupled to a ferromagnetic tip
• Design and performance of an ultra-high vacuum spin-polarized scanning tunneling microscope operating at 30 mK and in a vector magnetic field
• Quantum phase transitions driven by rhombic-type single-ion anisotropy in the S=1 Haldane chain
• Low-energy physics of three-orbital impurity model with Kanamori interaction
• A theoretical review on the single-impurity electron spin resonance on surfaces
• Quantum phase transitions in spin-1 XXZ chains with rhombic single-ion anisotropy
• Realistic theory of electronic correlations in nanoscopic systems
• $\mathrm{F}{\mathrm{e}}_3\mathrm{GeT}{\mathrm{e}}_2$: A site-differentiated Hund metal
• Long spin relaxation times in a transition metal atom in direct contact to a metal substrate
• Differentiating Hund from Mott physics in a three-band Hubbard-Hund model: Temperature dependence of spectral, transport, and thermodynamic properties
• Substrate-supported triplet superconductivity in Dirac semimetals
• Testing the topological nature of end states in antiferromagnetic atomic chains on superconductors
• Strong correlation effects in theoretical STM studies of magnetic adatoms
• Inelastic electron tunneling spectroscopy for probing strongly correlated many-body systems by scanning tunneling microscopy
• Uncovering Non-Fermi-Liquid Behavior in Hund Metals: Conformal Field Theory Analysis of an SU(2)$\times$SU(3) Spin-Orbital Kondo Model
• Spin-orbit coupling in three-orbital Kanamori impurity model and its relevance for transition-metal oxides
• Emergent moments in a Hund's impurity
• Valence fluctuations and empty-state resonance for Fe adatom on a surface
• Tuning orbital-selective phase transitions in a two-dimensional Hund's correlated system
• Temperature evolution of the Kondo peak beyond Fermi liquid theory
• Dynamical spin accumulation in large-spin magnetic molecules
• Frozen spin ratio and the detection of Hund correlations
• Probing the spin polarization of an Anderson impurity
• Optically and electrically controllable adatom spin-orbital dynamics in transition metal dichalcogenides
• Manipulation of the magnetic state of a porphyrin-based molecule on gold: From Kondo to quantum nanomagnet via the charge fluctuation regime
• Current shot noise in atomic contacts: Fe and FeH${}_2$ between Au electrodes
• Quantifying the quantum nature of high spin YSR excitations in transverse magnetic field
• Magnetic flux induced topological superconductivity in magnetic atomic rings
• Investigation of the Yu-Shiba-Rusinov states of a multi-impurity Kondo system
• Anomalous Fermi pockets on Hund's metal surface of Sr2RuO4 induced by the correlation-enhanced spin-orbit coupling
• Three-atom magnets with strong substrate coupling: a gateway towards non-collinear spin processing