1-3 September 2025, Modena, Italy

⚠️ Warning:

Beware of Fake Accommodation Emails

We have been informed that some participants are receiving fraudulent emails from unauthorized third parties claiming to offer accommodation for the 2D Excitonic Insulators Workshop. These emails are not from the official conference organizers and should be ignored.

Please note:

• The conference does not work with any third-party booking agents.
• If you are unsure about the legitimacy of an email, do not click on any links or provide personal information.
• We have some accommodation suggestions on the conference website, but we do not take care of any accommodation arrangements.

If you have received a suspicious email, feel free to forward it to us at massimo.rontani@nano.cnr.it or claudia.cardoso@nano.cnr.it.

Your safety and privacy are important to us. Thank you for staying vigilant!

The focus of this new edition will be the frantic hunt for macroscopic quantum coherence, the search of new candidate materials and the prediction of experimental fingerprints of the condensed excitonic phase, the understanding of the relation between excitonic and other unconventional phases.

Following the three previous workshops that took place in 2018, 2021 and 2023, we are now organising the fourth edition of the Two-dimensional excitonic insulators  Workshop.

Building on the discussion of common themes and novel challenges, both theoretical and computational, this Workshop will progress our understanding of interacting systems in low dimensions.

The organisers are Hope Bretscher (MPI, Germany), Elisa Molinari (UniMoRe, Italy) and Massimo Rontani (Cnr-Nano, Italy)

Invited Speakers:

More details about the workshop HERE

The excitonic insulator – EI – is the heretical paradigm of condensed matter theory, a macroscopic quantum coherent state made of excitons, electron-hole pairs bound by Coulomb attraction, which spontaneously form and condense at thermodynamic equilibrium. Since excitons collectively enforce a many-body gap by sharing the same wave function, akin to Cooper pairs in the superconductor, the EI phase might display new, intriguing forms of macroscopic quantum coherence. So far, strong evidence was reported in bilayer systems only, as the spatial separation of electrons and holes simplifies the detection of the EI phase.

Here at Cnr-Nano Modena we hunt for the bulk excitonic insulator phase and its unique properties by investigating theoretically novel systems that sustain long-range electron-hole attraction. We focus on layered materials that exhibit huge excitonic effects, as a consequence of both reduced dimensionality and ineffective screening, and may host topological as well as other kinds of order. We work to build a self-contained, comprehensive theoretical framework of the EI that relies on the organic combination of state-of-the-art model and first-principles calculations.  Our research team includes main developers of the Yambo code and operates within the larger framework of MAX – MAterials design at the eXascale, a European Centre of Excellence which enables materials modelling and simulations at the frontiers of High Performance Computing.