Orbital correlations in bilayer nickelates: roles of doping and interlayer coupling
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arXiv
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| Autores principales: | , , |
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| Formato: | Preprint |
| Publicado: |
2025
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| _version_ | 1866912265390784512 |
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| author | Goyal, Garima Jain, Aastha Singh, Dheeraj Kumar |
| author_facet | Goyal, Garima Jain, Aastha Singh, Dheeraj Kumar |
| contents | We study the nature of orbital correlations present in the bilayer nickelate within a minimal two-orbital tight-binding model to gain insights into their possible role in stabilizing the less-known weakly-insulating state. The latter has been observed experimentally at ambient pressure. In order to achieve this objective, we examine the static orbital susceptibilities within the random-phase approximation. Our study highlights the sensitivity of orbital correlations to various factors including the interlayer coupling, carrier concentration, band-structure details such as the orbital contents, the number of bands contributing at the Fermi level etc. We relate this sensitiveness to the modification of the Fermi surfaces as well as their orbital contents dependent on aforementioned factors. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2502_00701 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Orbital correlations in bilayer nickelates: roles of doping and interlayer coupling Goyal, Garima Jain, Aastha Singh, Dheeraj Kumar Strongly Correlated Electrons Superconductivity We study the nature of orbital correlations present in the bilayer nickelate within a minimal two-orbital tight-binding model to gain insights into their possible role in stabilizing the less-known weakly-insulating state. The latter has been observed experimentally at ambient pressure. In order to achieve this objective, we examine the static orbital susceptibilities within the random-phase approximation. Our study highlights the sensitivity of orbital correlations to various factors including the interlayer coupling, carrier concentration, band-structure details such as the orbital contents, the number of bands contributing at the Fermi level etc. We relate this sensitiveness to the modification of the Fermi surfaces as well as their orbital contents dependent on aforementioned factors. |
| title | Orbital correlations in bilayer nickelates: roles of doping and interlayer coupling |
| topic | Strongly Correlated Electrons Superconductivity |
| url | https://arxiv.org/abs/2502.00701 |