Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
TT: Fachverband Tiefe Temperaturen
TT 34: Superconductivity: Theory
TT 34.6: Vortrag
Mittwoch, 19. März 2025, 16:15–16:30, H36
Electronic structure and superconductivity in nickelates and cuprates: Insights from DMFT and DΓA — •Eric Jacob1, Mario Malcolms de Oliveira2, Thomas Schäfer2, Paul Worm1, Liang Si3,1, and Karsten Held1 — 1Institute of Solid State Physics, TU Wien, 1040 Vienna, Austria — 2Max-Planck-Institut für Festkörperforschung, 70569 Stuttgart, Germany — 3School of Physics, Northwest University, Xi’an 710127, China
The infinite-layer nickelates and cuprates represent two compelling families of materials for exploring unconventional superconductivity and correlated electronic phenomena. I will discuss recent advances in understanding the electronic structure of infinite-layer nickelates, focusing on insights from dynamical mean-field theory (DMFT) and their comparison with experimental findings ([1]) from angle-resolved photoemission spectroscopy (ARPES). This helps [2] constrain possible scenarios for their electronic states. In particular, there is only one Ni orbital crossing the Fermi surface. Additionally, I will present ongoing investigations into superconductivity in both nickelates and cuprates, based on the dynamical vertex approximation (DΓ A [3], [4]).
Funding through the FWF project I5398 is gratefully acknowledged.
[1] W. Sun et al., arXiv:2403.07344 (2024).
[2] L. Si et al., Phys. Rev. Res. 6, 043104 (2024).
[3] G. Rohringer et al., Rev. Mod. Phys. 90, 025003 (2018).
[4] M. Kitatani et al., J. Phys. Mater. 5, 034005 (2022).
Keywords: Extension of dynamical mean-field theory; Dynamical vertex approximation; Nickelates and cuprates; Hubbard Model; Emery Model