{
  "abstract": "The design of quantum materials to manipulate dimensionality and electronic correlations is a central focus in the exploration of emergent phenomena. We propose a new correlated quantum material platform for realizing a layer- and orbital-selective Mott transition (LOSMT) in a nickelate heterostructure by combining bilayer and monolayer LaNiO$_3$ separated by a monolayer LaAlO$_3$ spacer under compressive strain from the LaAlO$_3$ substrate. The LOSMT emerges from the layer-dependent dimensional confinement of the apical Ni($d$)-$z^2$ orbital and strain-induced lifting of the orbital degeneracy. The monolayer LaNiO$_3$ exhibits an orbital-selective Mott insulating phase with a Mott gap in the Ni($d$)-$z^2$ orbital, whereas the bilayer LaNiO$_3$ exhibits a multi-orbital metallic phase, triggering the orbital-selective Mott transition upon cooling $via$ inter-layer hybridization of the Ni($d$)-$z^2$ orbitals. Calculations within the density functional theory plus dynamical mean-field theory (DFT+DMFT) framework reveal that the LOSMT drives a dimensional crossover by enabling out-of-plane electronic transport through the metallization of the localized apical Ni($d$)-$z^2$ orbital, while the planar Ni($d$)-$x^2-y^2$ orbital remains itinerant across the transition. The emergence of the LOSMT provides a new pathway for engineering correlated quantum materials toward unconventional superconductivity and Mott-transistor functionalities.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2609.13723",
  "author_total": 3,
  "authors": [
    {
      "name": "Minjae Kim"
    },
    {
      "name": "Byungmin Sohn"
    },
    {
      "name": "Sangjae Lee"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/6rfgvcdf1mahw.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2609.13723",
  "fulltext_url": null,
  "id": "6rfgvcdf1mahw",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2609.13723",
  "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"
    ],
    [
      "openalex",
      "2505|Electronic and Structural Properties of Oxides"
    ]
  ],
  "openalex": "W7213254120",
  "pdf_url": "https://arxiv.org/pdf/2609.13723",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-12",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/6rfgvcdf1mahw.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:21:25Z",
      "native_id": "2609.13723",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2609.13723"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:cond-mat.str-el",
      "subfield": "condensed-matter"
    }
  ],
  "title": "Layer- and Orbital-Selective Mott Physics Driving Dimensional Crossover in Nickelate Superlattices",
  "title_text": "Layer- and Orbital-Selective Mott Physics Driving Dimensional Crossover in Nickelate Superlattices",
  "type": "preprint",
  "updated_at": "2026-10-30T12:21:25Z",
  "url": "https://research.draconitic.com/paper/6rfgvcdf1mahw",
  "venue": "arXiv",
  "versions": []
}