Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
TT: Fachverband Tiefe Temperaturen
TT 57: Poster: Superconductivity I
TT 57.17: Poster
Donnerstag, 30. März 2023, 15:00–18:00, P2/OG2
Analytical parquet renormalization group for multipocket systems — •Nora Taufertshöfer, Matteo Dürrnagel, and Ronny Thomale — Theoretische Physik I, Universität Würzburg
Materials with multi-pocket fermiology may exhibit unconventional superconductivity which arises from inter-pocket scattering. Studying this problem in the weak coupling regime by renormalization group (RG) methods requires a perturbative expansion in each flow step.
As electronically driven instabilities are predominantly governed by states close to the Fermi surface, the RG analysis can be restricted to a few distinct momentum channels between the Fermi pockets.
The parquet RG [1] embeds the truncation of the flow equations
into a rigorous analytical scheme to investigate superconductivity and its interplay with various competing phases.
Within this framework we discuss the relevance of nematic fluctuations in a 2D model for GaAs/AlAs heterostructures, which may host the possibility for gate-tunable unconventional superconductivity [2].
[1] S. Maiti and A. V. Chubukov, Phys. Rev. B 82, 214515 (2010)
[2] A. V. Chubukov and S. A. Kivelson, Phys. Rev. B 96, 174514 (2017)