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… 

Parametrizations of local vertex corrections from weak to strong coupling: Importance of the Hedin three-leg vertex

In the study of correlated systems, approximations based on the dynamical mean-field theory (DMFT) provide a practical way to take local vertex corrections into account, which capture, respectively,

Prototypical many-body signatures in transport properties of semiconductors

We devise a methodology for charge, heat, and entropy transport driven by carriers with finite lifetimes. Combining numerical simulations with analytical expressions for low temperatures, we

LinReTraCe: The Linear Response Transport Centre

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.

Tiling with triangles: parquet and $GW\gamma$ methods unified.

The parquet formalism and Hedin's $GW\gamma$ approach are unified into a single theory of vertex corrections, corresponding to a bosonization of the parquet equations. The method has no drawbacks



Diagrammatic study of optical excitations in correlated systems

The optical conductivity contains relevant information on the properties of correlated electron systems. In infinite dimensions, where dynamical mean field theory becomes exact, vertex corrections

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

Raman scattering from antiferromagnetic spin fluctuations

A microscopic theory for the scattering of light from spin fluctuation pair modes in the two-dimensional Hubbard model is presented. Two-spin fluctuation processes with opposite momenta near the

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

Impact of nonlocal correlations over different energy scales: A dynamical vertex approximation study

In this paper, we investigate how nonlocal correlations affect, selectively, the physics of correlated electrons over different energy scales, from the Fermi level to the band edges. This goal is

Diagrammatic routes to nonlocal correlations beyond dynamical mean field theory

Strong electronic correlations pose one of the biggest challenges to solid state theory. We review recently developed methods that address this problem by starting with the local, eminently important