You are cordially invited to the SCL seminar of the Center for the Study of Complex Systems, which will be held on Thursday, 18 September 2025 at 14:00 in the "Zvonko Marić" lecture hall of the Institute of Physics Belgrade. The talk entitled

Models and methods in the study of high-temperature superconductivity

will be given by Dr Jakša Vučičević (SCL, Institute of Physics Belgrade). The abstract of the talk:

We will cover several lines of ongoing work aimed at improving our understanding of the cuprate superconductors. We focus on the mechanisms that determine the normal-phase transport properties and the magnitude of the superconducting critical temperature. The main difficulty in the theoretical description of the cuprates is that it requires a many-body treatment of an effectively strong interaction between the electrons; in addition, the details of the crystal structure also play a role, and one cannot account for material-specific properties by solving the simplest models. We will discuss the possible low-energy models and the ways to extract the corresponding model-parameters from ab initio results [1,2]. Then, we will discuss recent advancements in methodology, in particular related to computing the dynamical response functions in interacting lattice models. Our results are pertinent to the hypothesis that the cuprate strange-metal regime is linked with quantum criticality [3,4].

[1] J. Vučičević and M. Ferrero, Phys. Rev. B 109, L081115 (2024)
[2] J. B. Profe, J. Vučičević, P. P. Stavropoulos, M. Rösner, R. Valentí, L. Klebl, arXiv:2507.16916 (2025)
[3] J. Vučičević, S. Predin and M. Ferrero, Phys. Rev. B 107, 155140 (2023)
[4] J. Kovačević, M. Ferrero, and J. Vučičević, Phys. Rev. Lett. 135, 016502 (2025)