Van-Hove tuning of Fermi surface instabilities through compensated metallicity
Fuente:
arXiv
Guardado en:
| Autores principales: | , , , , , , , , |
|---|---|
| Formato: | Preprint |
| Publicado: |
2023
|
| Materias: | |
| Acceso en línea: | |
| Etiquetas: |
Agregar Etiqueta
Sin Etiquetas, Sea el primero en etiquetar este registro!
|
| _version_ | 1866912741339430912 |
|---|---|
| author | Hohmann, Hendrik Dürrnagel, Matteo Bunney, Matthew Enzner, Stefan Schwemmer, Tilman Neupert, Titus Sangiovanni, Giorgio Rachel, Stephan Thomale, Ronny |
| author_facet | Hohmann, Hendrik Dürrnagel, Matteo Bunney, Matthew Enzner, Stefan Schwemmer, Tilman Neupert, Titus Sangiovanni, Giorgio Rachel, Stephan Thomale, Ronny |
| contents | 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 multi-pocket fermiology, charge compensation is realized by strong breaking of chiral symmetry from intra-sublattice hybridization, while retaining vH dominated physics at the Fermi level. We conclude by proposing tangible realizations through quantum material design. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2312_07653 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Van-Hove tuning of Fermi surface instabilities through compensated metallicity Hohmann, Hendrik Dürrnagel, Matteo Bunney, Matthew Enzner, Stefan Schwemmer, Tilman Neupert, Titus Sangiovanni, Giorgio Rachel, Stephan Thomale, Ronny Strongly Correlated Electrons Materials Science Superconductivity 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 multi-pocket fermiology, charge compensation is realized by strong breaking of chiral symmetry from intra-sublattice hybridization, while retaining vH dominated physics at the Fermi level. We conclude by proposing tangible realizations through quantum material design. |
| title | Van-Hove tuning of Fermi surface instabilities through compensated metallicity |
| topic | Strongly Correlated Electrons Materials Science Superconductivity |
| url | https://arxiv.org/abs/2312.07653 |