Regensburg 2025 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 35: Topology: Poster

TT 35.5: Poster

Mittwoch, 19. März 2025, 15:00–18:00, P3

Instabilities driven by electron-electron interactions — •Eva López Rojo, Julia Link, and Carsten Timm — TU Dresen, Germany

We develop a formalism to study the effect of strong electron-electron interactions in a Weyl semimetal. In this poster, we present the findings for the case of two doped Weyl cones with opposite chirality. For this purpose, we employ a path integral formalism to study different instabilities that could take place. Instead of the charge density wave proposed in the literature, the leading instability for strong inter-valley interactions is found to be a spin density wave, which still has the potential to host axion physics.

Keywords: Weyl semimetals; Axionic insulators