Vorträge und Posterpräsentationen (ohne Tagungsband-Eintrag):
A. Kauch, F. Hörbinger, G. Li, K. Held:
"Interplay between superconducting and magnetic fluctuations in the overdoped 2D Hubbard model";
Vortrag: NGSCES 2018, San Sebastian / Donostia, Spain,
San Sebastian / Donostia, Spain;
03.09.2018
- 07.09.2018.
Kurzfassung englisch:
The importance of antiferromagnetism for $d_{x^2-y^2}$-wave type superconductivity has already been established within various theoretical methods~\cite{scalapino_rmp}. In this work we focus on the overdoped regime, where the magnetic fluctuations become incommensurate.
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The solution of the Hubbard model by parquet equations gives us the unique opportunity to treat fluctuations in all channels on equal footing. While our results confirm that antiferromagnetic fluctuations support $d_{x^2-y^2}$-wave superconductivity at low doping, we have found~\cite{kauch} a possible pairing interaction with higher order $s$-wave symmetry ($\bar{s}$-wave, shown in Fig.~1.) supported by magnetic fluctuations with an incommensurate ordering vector $\bf{Q}=(\pi, \pi-\delta)$ at dopings over $\sim$20\%.
Erstellt aus der Publikationsdatenbank der Technischen Universität Wien.