Year: 2024
Type: article
Abstract: 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 Sr2RuO4. We then constrain a low energy model of the VHS of the surface layer of Sr2RuO4against 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.
Source: Nature Communications
Language: English
Subfield: Materials Chemistry
Field: Materials Science
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $6,790
Awards: Strain-Tuning of Emergent states of Matter, G1583565185, G2103920996, G3397507812, EPCC Tier 2 HPC Service, Strain-tuning electronic structure and quantum many-body interactions, Controlling Emergent Orders in Quantum Materials, G4707744943, G4733123206, G6089097373, G6804969230, Designing and exploring new quantum materials based on Fermi surface topological transitions, G695304645, G8946172392
OpenAlex ID: W4404020409