On the engineering of higher-order Van Hove singularities in two dimensions
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arXiv
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| Autores principales: | , , , , , , |
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| Formato: | Preprint |
| Publicado: |
2023
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| _version_ | 1866916567673995264 |
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| author | Chandrasekaran, Anirudh Rhodes, Luke C. Morales, Edgar Abarca Marques, Carolina A. King, Phil D. C. Wahl, Peter Betouras, Joseph J. |
| author_facet | Chandrasekaran, Anirudh Rhodes, Luke C. Morales, Edgar Abarca Marques, Carolina A. King, Phil D. C. Wahl, Peter Betouras, Joseph J. |
| contents | 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$_2$RuO$_4$. We then constrain a low energy model of the VHS of the surface layer of Sr$_2$RuO$_4$ 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 | Preprint |
| id |
arxiv_https___arxiv_org_abs_2310_15331 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | On the engineering of higher-order Van Hove singularities in two dimensions Chandrasekaran, Anirudh Rhodes, Luke C. Morales, Edgar Abarca Marques, Carolina A. King, Phil D. C. Wahl, Peter Betouras, Joseph J. Strongly Correlated Electrons Materials Science Superconductivity 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$_2$RuO$_4$. We then constrain a low energy model of the VHS of the surface layer of Sr$_2$RuO$_4$ 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. |
| title | On the engineering of higher-order Van Hove singularities in two dimensions |
| topic | Strongly Correlated Electrons Materials Science Superconductivity |
| url | https://arxiv.org/abs/2310.15331 |