Superconductivity in interacting Weyl models: A combined auxiliary-field quantum Monte Carlo and mean-field study

ORAL

Abstract

The discovery of superconducting Weyl semimetals has sparked an intense effort to understand the connection between topology and correlations in these materials, specifically, the pairing behavior of emergent Weyl fermions. Here we study a simple 2D Weyl model with attractive interactions using a combination of numerically exact auxiliary-field quantum Monte Carlo calculations and mean-field theory [1]. We focus on the rich pairing behavior that emerges from the interplay of the spin and sublattice degrees of freedom, as well as the bond-density order. Finally, we present preliminary results on a 3D extension of the model, with direct relevance to the case of MoTe2. These high-accuracy results are an important step towards a many-body description of strongly-correlated Weyl materials and topological superconductors.

[1] Phys. Rev. B 100, 104522 (2019)

*This work was supported in part by the U.S. National High Magnetic Field Laboratory, which is funded by NSF DMR-1157490 and the State of Florida.

–

Presenters

  • Peter Rosenberg

    • Natl High Magnetic Field Lab

Authors

  • Peter Rosenberg

    • Natl High Magnetic Field Lab

  • Niraj Aryal

    • Condensed Matter Physics and Materials Science Division, Brookhaven National Laboratory
    • Brookhaven National Laboratory
    • Natl High Magnetic Field Lab
    • Florida State University

  • Efstratios Manousakis

    • Florida State University, Tallahassee, FL, USA; National High Magnetic Field Laboratory FL USA; University of Athens, Panepistimioupolis, Zografos, Athens, Greece
    • Florida State University
    • Physics, Florida State University and University of Athens
    • Natl High Magnetic Field Lab