Arrival and check-in

Welcome Chair: Oscar Grånäs

Local and nonlocal electron and spin dynamics at Au/Fe/MgO(001) heterostructures

• Uwe Bowensiepen (Universität Duisburg-Essen)

Spin fluctuation induced anomalous-Hall effect

• Ola Forslund (University of Zurich)

Intriguing magnetic phenomena in 2D Fe5GeTe2 high temperature magnet with Co and Ni doping

• Biplab Sanyal (Uppsala University)

Information on discussion sessions

XAS of tailored nanoscale transition metal oxides

• Carolin Schmitz-Antoniak (Technische Hochschule Wildau)

Chair: Danny Thonig

Many-body quantum sign structures

• Andrey Bagrov (Radboud University)

Ab-initio approach for laser-induced domain wall dynamics

• Mohamed Elhanoty (Uppsala University)

Topological magnetism in B20 multilayers from first principles

• Vladislav Borisov (Uppsala University)

Phase-Space methods for Fermi-Hubbard model

• François Rousse (Uppsala University)

Fun wildlife presentation

• Biplab Sanyal (Uppsala University)

Magnetic textures and spin dynamics in low-dimensional materials

• Anna Delin (KTH Royal Institute of Technology)

Chair: Hugo Strand

Structure-driven topological phase transition in a quasi-1D ferromagnetic Weyl semi-metal

• Chin Shen Ong (Uppsala University)

Dynamical correlations and order in twisted bilayer graphene

• Gautam Rai (University of Hamburg)

Superconductivity in the pressurized nickelate La3Ni2O7 in the vicinity of a BEC-BCS crossover

• Henning Schloemer (University of Munich)

Abstract: Ever since the discovery of high-temperature superconductivity in cuprates, gaining microscopic insights into the nature of pairing in strongly correlated, repulsively interacting fermionic systems has remained one of the greatest challenges in modern condensed matter physics. Following recent experiments reporting superconductivity in the bilayer nickelate La3Ni2O7 (LNO) with remarkably high critical temperatures of Tc = 80 K, it has been argued that the low-energy physics of LNO can be described by a strongly correlated, bilayer t-J model. In this talk, I present our recent investigations of this bilayer system, where we utilize density matrix renormalization group techniques to establish a thorough understanding of the model and the magnetically induced pairing through comparison to the perturbative limit of dominating inter-layer spin couplings. In particular, this allows us to explain appearing finite-size effects, firmly establishing the existence of long-range pairing order in the thermodynamic limit. As the effective model in the perturbative limit is known to show linear resistivity above the superconducting transition temperature, we propose a pair-based interpretation of the extended strange metal phase observed in LNO. By analyzing binding energies, we predict a BEC-BCS crossover as a function of the Hamiltonian parameters, whereas LNO is anticipated to lie on the BCS side in vicinity of the transition. Lastly, I discuss how binding energies in the system are of the order of the inter-layer coupling, which suggest strikingly high critical temperatures of the Berezinskii-Kosterlitz-Thouless transition and raise the question whether nickelate superconductors possibly facilitate critical temperatures above room temperature.

Plasmons in spatially inhomogeneous 2d media: semiclassical results and perspectives

• Koen Reijnders (Radboud University)

MAX IV, opportunities for strongly correlated materials

• Aymeric Robert (MAX IV Laboratory)

Chair: Andrey Bagrov

Effect of magnetic excitations on electron dynamics in the vicinity of the Mott transition

• Evgeny Stepanov (Ecole Polytechnique)

Non-local spin and lattice damping from first principles

• Danny Thonig (Örebro University)

Charge-density waves in transition metal dichalcogenides

• Erik van Loon (Lund University)

Photoelectron microscopy and spectroscopy using femto- and attosecond lasers.

• Anders Mikkelsen (Lund University)

Chair: Heike Herper

Analyzing electronic correlations and electron-phonon interaction during non-equilibrium with femtosecond time-resolved x-ray spectroscopy

• Andrea Eschenlohr (University Duisburg-Essen)

Screening induced crossover between phonon and plasmon-mediated pairing in layered superconductors

• Yann in 't Veld (Radboud University)

Experimental ultrafast magnetization dynamics

• Ronny Knut (Uppsala University)

Coupled atomistic spin-lattice simulations of ultrafast demagnetization in 3d ferromagnets

• Maryna Pankratova (Uppsala University)

Theory of X-ray absorption spectroscopy for ferrites

• Felix Sorgenfrei (Uppsala University)

Chair: Andrey Bagrov

Heat and work in quantum thermodynamics: a cybernetic approach

• William Rupush (Uppsala University)

Mottism and Magnetism in Frustrated Cluster Magnets Nb3X8 (X=Cl, Br, and I)

• Sergii Grytsiuk (Radboud University)

Magnetism of lead-free halide double perovskites

• Sergei Simak (Linköping University)

Final words

Check-out and departure