Characteristic Timescales of the Local Moment Dynamics in Hund's Metals.

@article{Watzenbck2020CharacteristicTO,
  title={Characteristic Timescales of the Local Moment Dynamics in Hund's Metals.},
  author={Clemens Watzenb{\"o}ck and Martin Dr. Edelmann and D. Springer and Giorgio Sangiovanni and Alessandro Toschi},
  journal={Physical review letters},
  year={2020},
  volume={125 8},
  pages={
          086402
        }
}
We study the characteristic timescales of the fluctuating local moments in Hund's metal systems for different degrees of correlation. By analyzing the dynamical spin susceptibility in the real-time domain, we determine the timescales controlling oscillation and damping of on-site fluctuations-a crucial factor for the detection of local moments with different experimental probes. We apply this procedure to different families of iron pnictides or chalcogenides, explaining the material trend in… 
View on PubMed
arxiv.org
13 Citations
Background Citations
6
Methods Citations
1

Figures and Tables from this paper

13 Citations

Resistivity Exponents in 3D Dirac Semimetals From Electron-Electron Interaction.

This work studies the resistivity of three-dimensional semimetals with linear dispersion in the presence of on-site electron-electron interaction to yield a natural explanation for the hitherto not understood large exponents characterizing the temperature dependence of transport experiments on various topological semimetal.

Osmates on the Verge of a Hund's-Mott Transition: The Different Fates of NaOsO_{3} and LiOsO_{3}.

It is shown that the cooperative action of intraorbital repulsion and Hund's exchange becomes the dominant physical mechanism in these materials if their t_{2g} shell is half filled.

How to read between the lines of electronic spectra: the diagnostics of fluctuations in strongly correlated electron systems

  • T. SchäferA. Toschi
  • Physics
    Journal of physics. Condensed matter : an Institute of Physics journal
  • 2021
A comprehensive overview of the different approaches which have been recently developed and applied to identify the dominant two-particle scattering processes controlling the shape of the one-particles spectral functions and, in some cases, of the physical response of the system.

Emergent moments in a Hund's impurity

Victor Drouin-Touchette, Elio J. König, 2 Yashar Komijani, 3 and Piers Coleman 4 Center for Materials Theory, Rutgers University, Piscataway, New Jersey 08854, USA Max-Planck Institute for Solid…

Quantitative functional renormalization group description of the two-dimensional Hubbard model

Using a leading algorithmic implementation of the functional renormalization group (fRG) for interacting fermions on two-dimensional lattices, we provide a detailed analysis of its quantitative…

Spin dynamics in NaFeAs and NaFe0.53Cu0.47As probed by resonant inelastic x-ray scattering

The parent compounds of iron-based superconductors are magnetically ordered bad metals, with superconductivity appearing near a putative magnetic quantum critical point. The presence of both Hubbard…

Long-term memory magnetic correlations in the Hubbard model: A dynamical mean-field theory analysis

We investigate the onset of a not-decaying asymptotic behavior of temporal magnetic correlations in the Hubbard model in infinite dimensions. This long-term memory feature of dynamical spin…

Fe 3 GeTe 2 : A site-differentiated Hund metal

Magnetism in two-dimensional (2D) van der Waals (vdW) materials has lately attracted considerable attention from the point of view of both fundamental science and device applications. Obviously,…

Fe3GeTe2: a site-differentiated Hund metal

Magnetism in two-dimensional (2D) van der Waals (vdW) materials has lately attracted considerable attention from the point of view of both fundamental science and device applications. Obviously,…

Fulfillment of sum rules and Ward identities in the multiloop functional renormalization group solution of the Anderson impurity model

We investigate several fundamental characteristics of the multiloop functional renormalization group (mfRG) flow by hands of its application to a prototypical many-electron system: the Anderson…

References

SHOWING 1-10 OF 66 REFERENCES

Quantum dynamical screening of the local magnetic moment in Fe-based superconductors

We have calculated the local magnetic susceptibility of one of the prototypical Fe-based superconductors (LaFeAsO) by means of the local density approximation + dynamical mean field theory as a…

Dichotomy between large local and small ordered magnetic moments in iron-based superconductors.

We study a four-band model for iron-based superconductors within the local density approximation combined with dynamical mean-field theory (LDA+DMFT). This successfully reproduces the results of…

Spin freezing transition and non-Fermi-liquid self-energy in a three-orbital model.

A single-site dynamical mean-field study of a three band model with the rotationally invariant interactions appropriate to the t_(2g) levels of a transition metal oxide reveals a quantum phase…

Itinerancy-enhanced quantum fluctuation of magnetic moments in iron-based superconductors.

Interestingly, the underlying mechanism is shown to be an intrapocket nesting-associated long-range coupling rather than the previously believed ferromagnetic double-exchange effect, which challenges the validity of ferromagnetically compensated first-neighbor coupling reported from short-range fitting to the experimental dispersion.

Janus-faced influence of Hund's rule coupling in strongly correlated materials.

A concise classification of 3d and 4d transition-metal oxides is proposed within which the ubiquitous occurrence of strong correlations in Ru- and Cr-based oxides, as well as the recently measured high Néel temperatures in Tc-based perovskites are naturally explained.

J Freezing and Hund's Rules in Spin-Orbit-Coupled Multiorbital Hubbard Models.

We investigate the phase diagram of the spin-orbit-coupled three orbital Hubbard model at arbitrary filling by means of dynamical mean-field theory combined with the continuous-time quantum Monte…

Finite-temperature magnetism of transition metals: an ab initio dynamical mean-field theory.

An ab initio quantum theory of the finite-temperature magnetism of iron and nickel is presented and the many-body features of the one electron spectra and the observed magnetic moments below and above the Curie temperature are described.

Coherence–incoherence crossover in the normal state of iron oxypnictides and importance of Hund's rule coupling

A new class of high-temperature superconductors based on iron and arsenic was recently discovered (Kamihara et al 2008 J. Am. Chem. Soc. 130 3296), with the superconducting transition temperature as…

Inertia effects in the real-time dynamics of a quantum spin coupled to a Fermi sea

Spin dynamics in the Kondo impurity model, initiated by suddenly switching the direction of a local magnetic field, is studied by means of the time-dependent density-matrix renormalization group.…

Spin dynamics and relaxation in the classical-spin Kondo-impurity model beyond the Landau–Lifschitz–Gilbert equation

The real-time dynamics of a classical spin in an external magnetic field and local exchange coupled to an extended one-dimensional system of non-interacting conduction electrons is studied…
...