Broadening and sharpening of the Drude peak through antiferromagnetic fluctuations

@article{Worm2021BroadeningAS,
  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},
  year={2021}
}
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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