On the engineering of higher-order Van Hove singularities in two dimensions
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 disti...
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| Format: | Article |
| Language: | English |
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Nature Portfolio
2024-11-01
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| Series: | Nature Communications |
| Online Access: | https://doi.org/10.1038/s41467-024-53650-2 |
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| author | Anirudh Chandrasekaran Luke C. Rhodes Edgar Abarca Morales Carolina A. Marques Phil D. C. King Peter Wahl Joseph J. Betouras |
| author_facet | Anirudh Chandrasekaran Luke C. Rhodes Edgar Abarca Morales Carolina A. Marques Phil D. C. King Peter Wahl Joseph J. Betouras |
| author_sort | Anirudh Chandrasekaran |
| collection | DOAJ |
| description | 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 Sr2RuO4 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. |
| format | Article |
| id | doaj-art-ff991cb7cfdb44e49455ba2fb6dcf44f |
| institution | Kabale University |
| issn | 2041-1723 |
| language | English |
| publishDate | 2024-11-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Nature Communications |
| spelling | doaj-art-ff991cb7cfdb44e49455ba2fb6dcf44f2024-11-10T12:34:24ZengNature PortfolioNature Communications2041-17232024-11-011511910.1038/s41467-024-53650-2On the engineering of higher-order Van Hove singularities in two dimensionsAnirudh Chandrasekaran0Luke C. Rhodes1Edgar Abarca Morales2Carolina A. Marques3Phil D. C. King4Peter Wahl5Joseph J. Betouras6Department of Physics and Centre for the Science of Materials, Loughborough UniversitySUPA, School of Physics and Astronomy, University of St AndrewsSUPA, School of Physics and Astronomy, University of St AndrewsSUPA, School of Physics and Astronomy, University of St AndrewsSUPA, School of Physics and Astronomy, University of St AndrewsSUPA, School of Physics and Astronomy, University of St AndrewsDepartment of Physics and Centre for the Science of Materials, Loughborough UniversityAbstract 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 Sr2RuO4 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.https://doi.org/10.1038/s41467-024-53650-2 |
| spellingShingle | Anirudh Chandrasekaran Luke C. Rhodes Edgar Abarca Morales Carolina A. Marques Phil D. C. King Peter Wahl Joseph J. Betouras On the engineering of higher-order Van Hove singularities in two dimensions Nature Communications |
| title | On the engineering of higher-order Van Hove singularities in two dimensions |
| title_full | On the engineering of higher-order Van Hove singularities in two dimensions |
| title_fullStr | On the engineering of higher-order Van Hove singularities in two dimensions |
| title_full_unstemmed | On the engineering of higher-order Van Hove singularities in two dimensions |
| title_short | On the engineering of higher-order Van Hove singularities in two dimensions |
| title_sort | on the engineering of higher order van hove singularities in two dimensions |
| url | https://doi.org/10.1038/s41467-024-53650-2 |
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