{
  "abstract": "The orbital character of the so-called $A$-pocket in infinite-layer nickelates remains under debate. We investigate bulk NdNiO$_2$ using density-functional theory combined with dynamical mean-field theory and identify the $A$-pocket as a strongly hybridized state with substantial interstitial-$s$, Nd-$d_{xy}$ and Ni-d_${xz/yz}$ contributions. Our angle-resolved photoemission spectroscopy simulations reproduce the main polarization-dependent features measured experimentally. Removing the interstitial-$s$ matrix element leads to a clear disagreement with the measured Fermi surface maps, even though the interstitial-$s$ contribution is not dominant. Suppressing instead the Nd-d$_{xy}$ or Ni-$_{dxz/yz}$ matrix elements leaves the maps almost unchanged, because these are small at the zone corner. More generally, our results demonstrate that assigning the microscopic origin of spectral features in infinite-layer nickelates requires treating orbital hybridizations and photoemission matrix elements together.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2609.21665",
  "author_total": 4,
  "authors": [
    {
      "name": "Leonard M. Verhoff"
    },
    {
      "name": "Michael Seidl"
    },
    {
      "name": "Liang Si"
    },
    {
      "name": "Karsten Held"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/cr3nxtxc29ms2.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2609.21665",
  "fulltext_url": null,
  "id": "cr3nxtxc29ms2",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2609.21665",
  "language": null,
  "licence": "CC-BY-4.0",
  "licence_label": "CC BY 4.0",
  "licence_source": "article",
  "licence_url": "http://creativecommons.org/licenses/by/4.0/",
  "metadata_licence": "CC0-1.0",
  "native_subjects": [
    [
      "arxiv",
      "cond-mat.str-el"
    ],
    [
      "arxiv",
      "cond-mat.supr-con"
    ],
    [
      "openalex",
      "3104|Physics of Superconductivity and Magnetism"
    ]
  ],
  "openalex": "W7213955035",
  "pdf_url": "https://arxiv.org/pdf/2609.21665",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-18",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/cr3nxtxc29ms2.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:23:03Z",
      "native_id": "2609.21665",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2609.21665"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:cond-mat.str-el",
      "subfield": "condensed-matter"
    }
  ],
  "title": "Orbital character and photoemission signatures of the A-pocket in infinite-layer nickelates",
  "title_text": "Orbital character and photoemission signatures of the A-pocket in infinite-layer nickelates",
  "type": "preprint",
  "updated_at": "2026-10-30T12:23:03Z",
  "url": "https://research.draconitic.com/paper/cr3nxtxc29ms2",
  "venue": "arXiv",
  "versions": []
}