On the engineering of higher-order Van Hove singularities in two dimensions
The properties of correlated electron materials are often intricately linked to Van Hove singularities (VHS) in the vicinity of the Fermi energy. The class of these VHS is of great importance, with higher-order ones-with power-law divergence in the density of states-leaving frequently distinct signatures in physical properties. We use a new theoretical method to detect and analyse higher-order VHS (HOVHS) in two-dimensional materials and apply it to the electronic structure of the surface layer of Sr<sub>2</sub>RuO<sub>4</sub>. We then constrain a low energy model of the VHS of the surface layer of Sr<sub>2</sub>RuO<sub>4</sub> against angle-resolved photoemission spectroscopy and quasiparticle interference data to analyse the VHS near the Fermi level. We show how these VHS can be engineered into HOVHS.
Authors
- Edgar Abarca Morales (ORCID: https://orcid.org/0000-0002-7714-8228)
- P. D. C. King (ORCID: https://orcid.org/0000-0002-6523-9034)
- Joseph J. Betouras (ORCID: https://orcid.org/0000-0003-0574-4685)
- Anirudh Chandrasekaran (ORCID: https://orcid.org/0000-0002-2041-2884)
- Carolina A. Marques (ORCID: https://orcid.org/0000-0002-3804-096X)
- Peter Wahl (ORCID: https://orcid.org/0000-0002-8635-1519)
- Luke C. Rhodes (ORCID: https://orcid.org/0000-0003-2468-4059)
Institutions
- University of Bonn (DE)
- Loughborough University (GB)
- University of St Andrews (GB)
- University of Zurich (CH)
- Max Planck Institute for Chemical Physics of Solids (DE)
Publication Details
- Journal
- Nature Communications
- Published
- 2024-11-04
- DOI
- https://doi.org/10.1038/s41467-024-53650-2
- Citations
- 13
- Primary Topic
- Advanced Condensed Matter Physics
- Type
- article
- Field-Weighted Citation Impact
- 4.04
Funders
- Leverhulme Trust
- University of St Andrews
- Engineering and Physical Sciences Research Council