Bulletin of the American Physical Society
APS March Meeting 2023
Las Vegas, Nevada (March 5-10)
Virtual (March 20-22); Time Zone: Pacific Time
Session A24: Novel Strongly Correlated d- and f-electron Systems: Experiment and Precision Many-body Theory
8:00 AM–11:00 AM,
Monday, March 6, 2023
Room: Room 237
Sponsoring Unit: DCMP
Chair: Turan Birol, University of Minnesota
Abstract: A24.00005 : Dynamical Vertex Approximation Approach in Strongly Correlated Electron Systems*
10:24 AM–11:00 AM
I will start by giving a brief synopsis of these diagrammatic extensions of DMFT, in particular the first such approach, the dynamical vertex approximation (DΓA). For the applications, I will concentrate on spin-fluctuations and how they open a pseudogap and give rise to superconductivity e.g. in nickelates [2,3]. Among others, DΓA has been used to actually predict  the phase diagram critical-temperature vs. doping of the novel nickelate superconductors - with a breathtaking accuracy. Also the critical temperature of the recently synthesized pentalayer nickelates  nicely concurs with the DΓA calculation and infinite-layer experiments.
 G. Rohringer et al., Rev. Mod. Phys. 90, 025003 (2018).
 For a first reading cf. K. Held, arXiv:2208.03174.
 K. Held et al., Frontiers in Physics 9, 810394 (2022).
 M. Kitatani et al., npj Quantum Materials 5, 59 (2020).
 P. Worm et al., Phys. Rev. Materials 6, L091801 (2022).
*This work was supported by the Austrian Science Funds (FWF) through projetcs P 32044, P 35457, and I 5398.
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