【112】A strong-coupling mechanism for the pseudogap from spin fluctuations

5 Sept 2023, 17:15
15m
Aula 033

Aula 033

Talk Condensed Matter Physics (KOND) Condensed Matter Physics (KOND)

Speaker

Friedrich Krien

Description

The mechanism of the pseudogap observed in hole-doped cuprates remains one of the central puzzles in condensed matter physics. We analyze this phenomenon via a Feynman-diagrammatic inspection of the Hubbard model. Our approach captures the pivotal interplay between Mott localization and Fermi surface topology beyond weak-coupling spin fluctuations. Our analysis naturally explains puzzling features of the pseudogap observed in experiments, such as Fermi arcs being cut off at the antiferromagnetic zone boundary and the subordinate role of hot spots.

Theoretical Work Theory

Author

Friedrich Krien

Co-authors

Prof. Alessandro Toschi (TU Wien) Prof. Karsten Held (TU Wien) Dr Patrick Chalupa-Gantner (TU Wien) Paul Worm

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