[phys4phys] DMFT-QE Online Symposium - 2 November 2026 - Giovanni Sordi and Jakša Vučičević

[Nenad Vukmirovic]

Dear colleagues,

We are pleased to inform you about the DMFT-QE Online Symposium, which 
will take place on November 2, 2026, from 9:30 to 11:00 a.m. ET 
(15:30–17:00 Central European Time / Serbian time).

The featured talks will be presented by:
• Giovanni Sordi (Royal Holloway University of London)
• Jakša Vučičević (Institute of Physics Belgrade)

The abstracts of the talks and the Zoom access details are provided below.

Best regards,
Nenad Vukmirović

--
Dr Nenad Vukmirović
Research Professor
Institute of Physics Belgrade
Pregrevica 118, 11080 Belgrade, Serbia
URL: http://www.scl.rs/nenad


Zoom Meeting parameters:
https://simonsfoundation.zoom.us/j/95280116170?pwd=ajSRJj5FsBoDDQbWiAdBJGKxp2LOw0.1#success
ID: 952 8011 6170
Password: 365088


/Optimisation of the superconducting critical temperature in the Emery 
model/

*Giovanni Sordi*, Royal Holloway University of London

Investigating the superconducting critical temperature trends in 
cuprates is crucial for deciphering the underlying mechanism of 
high-temperature superconductivity. I will discuss this problem in the 
canonical model of the copper-oxygen plane, the Emery model, with 
cellular dynamical mean-field theory at finite temperature. Using the 
Zaanen-Sawatzky-Allen diagram as a guiding framework, I will discuss 
three conditions that optimise Tcmax in the Emery model: upon doping a 
charge-transfer insulator, close to the charge-transfer insulator to 
metal boundary, and, unexpectedly, deep into the charge-transfer regime, 
as this region displays large oxygen hole content. While the first two 
conditions were previously established, identifying the third condition 
is the key contribution of our work [1,2]. This finding opens up 
unexplored paths for optimising Tcmax, captures observed trends in 
hole-doped cuprates, and offers predictions for recent proposals to 
realise the Emery model with ultracold atoms.



/Lattice model approach for cuprates: importance of effective 
interactions for superconducting Tc/

*Jakša Vučičević*,Institute of Physics Belgrade

In this talk, I will present our recent results on modeling cuprate 
superconductors. We investigate the foundations of the lattice model 
approach, and introduce a rigorous formal procedure to perform 
downfolding. In this formalism, lattice models can be understood as 
truncations of the exact downfolded action, and the standard methods to 
parametrize the models can be understood diagrammatically [1]. We apply 
the standard downfolding procedure to a large number of cuprate 
compounds, and obtain a dataset of density functional theory (DFT) 
bandstructures and parameters for the Hubbard and Emery models. We 
analyze statistical correlations of experimentally observed Tc with 
model parameters, as well as with features of the crystal structure and 
the DFT bandstructure. Our data suggests that interactions on the oxygen 
orbitals and effective interaction retardation play a role in 
determining the magnitude of Tc [2]. Finally, we study ways to extract 
the effective coupling constant by comparing DMFT theory with 
experimental results and cross-check our parametrization [3].

[1] J. Profe et al., Phys. Rev. Research 8, 023091 (2026)
[2] J. Vučičević et al., arXiv:2606.21323 (2026)
[3] J. Vučičević and R. Žitko, arXiv:2604.08085 (2026)


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