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… 

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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
...