Broadening and sharpening of the Drude peak through antiferromagnetic fluctuations

  title={Broadening and sharpening of the Drude peak through antiferromagnetic fluctuations},
  author={Paul Worm and Clemens Watzenb{\"o}ck and Matthias Pickem and Anna Kauch and Karsten Held},
  journal={Physical Review B},
Antiferromagnetic or charge density wave fluctuations couple with light through the recently discovered {\pi}-ton contribution to the optical conductivity, and quite generically constitute the dominant vertex corrections in low-dimensional correlated electron systems. Here we study the arguably simplest version of these {\pi}-tons based on the semi-analytical random phase approximation (RPA) ladder in the transversal particle-hole channel. The vertex corrections to the optical conductivity are… 
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The ”Linear Response Transport Centre” (LinReTraCe), a package for the simulation of transport properties of solids, captures quantum (in)coherence effects beyond semi-classical Boltzmann techniques, while incurring similar numerical costs.


Theory of spin and charge fluctuations in the Hubbard model.
A self-consistent theory of both spin and charge fluctuations in the Hubbard model is presented. It is in quantitative agreement with Monte Carlo data at least up to intermediate coupling ([ital
Fate of the false Mott-Hubbard transition in two dimensions
We have studied the impact of non-local electronic correlations at all length scales on the Mott-Hubbard metal-insulator transition in the unfrustrated two-dimensional Hubbard model. Combining
Generic Optical Excitations of Correlated Systems: π-tons.
It is proposed to call the derived polaritons π-tons, which yield the leading vertex correction to the optical conductivity in all correlated models studied: the Hubbard, the extended Hubbard model, the Falicov-Kimball, and the Pariser-Parr-Pople model.
Conductivity in the Square Lattice Hubbard Model at High Temperatures: Importance of Vertex Corrections.
It is found that, at relevant (high) temperatures, the self-energy is practically local, yet the vertex corrections remain rather important, contrary to expectations.
Optical and dc conductivity of the two-dimensional Hubbard model in the pseudogap regime and across the antiferromagnetic quantum critical point including vertex corrections
The conductivity of the two-dimensional Hubbard model is particularly relevant for high-temperature superconductors. Vertex corrections are expected to be important because of strongly momentum
Particle-hole bound states in Mott-Hubbard insulators.
  • Clarke
  • Physics
    Physical review. B, Condensed matter
  • 1993
It is argued that in the insulating parent compounds of the high-temperature superconducting cuprates these correlation effects are of the same order of magnitude as particle-hole attraction due to longer-range Coulomb interactions.
Optical conductivity from cluster dynamical mean-field theory: Formalism and application to high-temperature superconductors
The optical conductivity of the one-band Hubbard model is calculated using the 'Dynamical Cluster Approximation' implementation of dynamical mean field theory for parameters appropriate to high
Hall effect and resistivity in high-T c superconductors: The conserving approximation
The Hall coefficient (R_H) of high-Tc cuprates in the normal state shows the striking non-Fermi liquid behavior: R_H follows a Curie-Weiss type temperature dependence, and |R_H|>>1/|ne| at low
Dynamical vertex approximation in its parquet implementation: Application to Hubbard nanorings
We have implemented the dynamical vertex approximation (DA) in its full parquet-based version to include spatial correlations on all length scales and in all scattering channels. The algorithm is
Excitons in one-dimensional Mott insulators
We employ dynamical density-matrix renormalization-group (DDMRG) and field-theory methods to determine the frequency-dependent optical conductivity in one-dimensional extended, half-filled Hubbard