Regensburg 2025 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 39: Twisted Materials / Systems (joint session TT/HL)

TT 39.4: Vortrag

Mittwoch, 19. März 2025, 17:45–18:00, H31

Ab-initio fRG study on tWSe₂ — •Hannes Braun — Max Planck Institut für Festkörperforschung — Technische Universität München

The recent experimental reports on superconductivity in twisted WSe₂ have served to justify the already considerable interest in twisted TMD systems. From a theoretical standpoint, there have been numerous attempts to describe these systems. To study the phase diagram and analyse the governing physics, we employ the functional renormalisation group method. This approach allows us to gain an unbiased understanding of the interplay between fluctuations leading to symmetry-broken phases. To develop a model capable of describing the material, we integrate ab-initio results as initial conditions. In this talk, we present method developments for a more efficient momentum integration and results on the interplay between magnet and pairing instabilities.

Keywords: functional Renormalization Group; Superconductivity; Instabilities; WSe2