Van Hove tuning of Fermi surface instabilities through compensated metallicity
Van-Hove (vH) singularities in the vicinity of the Fermi level facilitate the emergence of electronically mediated Fermi surface instabilities. This is because they provide a momentum-localized enhancement of density of states promoting selective electronic scattering channels. High-temperature topological superconductivity has been argued for in graphene at vH filling which, however, has so far proven inaccessible due to the demanded large doping from pristine half filling. We propose compensated metallicity as a path to unlock vH-driven pairing close to half filling in an electronic honeycomb lattice model. Enabled by an emergent multipocket fermiology, charge compensation is realized by strong breaking of chiral symmetry from intrasublattice hybridization, while retaining vH dominated physics at the Fermi level. We conclude by proposing tangible realizations through quantum material design.
Authors
- Tilman Schwemmer (ORCID: https://orcid.org/0000-0002-6683-0045)
- Stefan Enzner (ORCID: https://orcid.org/0000-0002-7683-4461)
- Giorgio Sangiovanni (ORCID: https://orcid.org/0000-0003-2218-2901)
- Matteo Dürrnagel (ORCID: https://orcid.org/0000-0001-5799-4008)
- Stephan Rachel (ORCID: https://orcid.org/0000-0002-3455-2802)
- Matthew Bunney (ORCID: https://orcid.org/0000-0002-4847-5799)
- Hendrik Hohmann (ORCID: https://orcid.org/0000-0002-2547-9500)
- Titus Neupert (ORCID: https://orcid.org/0000-0003-0604-041X)
- Ronny Thomale (ORCID: https://orcid.org/0000-0002-3979-8836)
Institutions
- The University of Melbourne (AU)
- University of Zurich (CH)
- University of Würzburg (DE)
- ETH Zurich (CH)
- Complexity, Topology and Dynamics in Quantum Matter (DE)
- RWTH Aachen University (DE)
Publication Details
- Journal
- Physical review. B./Physical review. B
- Published
- 2025-03-18
- DOI
- https://doi.org/10.1103/physrevb.111.l121105
- Primary Topic
- Physics of Superconductivity and Magnetism
- Type
- article
- Field-Weighted Citation Impact
- 0.00
Funders
- Friedrich-Alexander-Universität Erlangen-Nürnberg
- Deutsche Forschungsgemeinschaft
- European Research Council
- Australian Research Council