Proposed experiment to find the Sordi transition in doped κ-BEDT systems

ORAL

Abstract

Doping a Mott insulator triggers fascinating physics, such as the Sordi transition, a first-order transition between a pseudogap and a correlated Fermi liquid [1]. Although it is said that this transition could explain some of the most interesting features of cuprates, its origin remains unclear, and it has yet to be observed experimentally in 2D correlated systems. Recent work has dispelled the idea that the transition is an artifact of the specific numerical techniques used, as well as the fact that it is linked to magnetic transitions [2], but experimental confirmation is required to verify the existence of the Sordi transition. Because the Mott transition is inaccessible in cuprates, it’s necessary to search for it in other such as layered organic superconductors. Based upon results from dynamical cluster approximation on the triangular lattice Hubbard model, we propose a variety of experimental measurements for Hg-doped κ-BEDT layered organic superconductors to identify signatures of this elusive transition.



References

[1]. G. Sordi et al. Phys. Rev. B, 84 :075161, 2011.

[2]. P.-O. Downey et al. arXiv:2307.11190, 2023.

[3]. H. Oike et al. Nat. Comm. 8, 756, 2017.



*The computational resources for this work were provided by Compute Canada and Calcul Québec. We acknowledge support by the Natural Sciences and Engineering Council of Canada through RGPIN-2019-05312 and by the Canada First Research Excellence Fund. The Flatiron Institute is a division of the Simons Foundation.

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Publication: P.-O. Downey, O. Gingras, J. Fournier, C.-D. Hébert, M. Charlebois, and A.-M. S. Tremblay, Mott transition, Widom line,
and pseudogap in the half-filled triangular lattice Hubbard model, Physical Review B 107, 125159 (2023).

P. O. Downey, O. Gingras, C. D. Hébert, M. Charlebois, and A. M. S. Tremblay, Filling-induced mott transition and
pseudogap physics in the triangular lattice hubbard model, ArXiv (2023), arXiv:2307.11190

Presenters

  • Pierre-Olivier Downey

    • Universite de Sherbrooke

Authors

  • Pierre-Olivier Downey

    • Universite de Sherbrooke

  • Olivier Gingras

    • Center for Computational Quantum Physics, Flatiron Institute

  • Jerome Fournier

    • Université de Sherbrooke

  • Charles-David Hebert

    • Université de Sherbrooke

  • Maxime Charlebois

    • Université du Québec à Trois-Rivières

  • André-Marie S Tremblay

    • Université de Sherbrooke