{
  "abstract": "It has been well established that the orbital magnetization of interacting electrons can be simply evaluated by applying the single-particle formula to self-consistent HF bands. However, we show that such procedure fails qualitatively for orbital magnetic susceptibility, especially in topological systems: in a Chern-insulating phase of twisted MoTe$_2$, the interaction-induced correction reverses the sign of the susceptibility. This result follows from an algebraic framework that solves the HF problem at finite magnetic field, where noncommuting canonical momenta obstruct a direct calculation: a \\emph{reverse Peierls substitution} maps every magnetic-translation-invariant operator to a unique bivariate function, converting the finite-field self-consistency into a function equation that can be expanded systematically in $B$. At first order, this yields a linear equation for the field-induced change $δX$ of the Fock potential, leading to an intrinsically interaction-induced susceptibility in addition to a single-particle-like one. The framework reproduces the Středa formula for insulators, and an auxiliary-Hilbert-space construction carries it to periodic and moiré systems. Finite-field HF calculations in a gapped Dirac model and in the twisted-MoTe$_2$ Chern insulator confirm the theory quantitatively.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": "Journal reference: Physical Review Letters (2026)",
  "arxiv": "2607.27112",
  "author_total": 2,
  "authors": [
    {
      "name": "Ke Huang"
    },
    {
      "name": "Xiao Li"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/dbvw8880m5xv8.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2607.27112",
  "fulltext_url": null,
  "id": "dbvw8880m5xv8",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2607.27112",
  "language": null,
  "licence": "LicenseRef-arXiv-nonexclusive-1.0",
  "licence_label": "arXiv licence",
  "licence_source": "article",
  "licence_url": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
  "metadata_licence": "CC0-1.0",
  "native_subjects": [
    [
      "arxiv",
      "cond-mat.str-el"
    ]
  ],
  "openalex": null,
  "pdf_url": "https://arxiv.org/pdf/2607.27112",
  "pmcid": null,
  "pmid": null,
  "published": "2026-08-09",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/dbvw8880m5xv8.ris",
  "sources": [
    {
      "first_seen": "2026-11-03T12:20:58Z",
      "native_id": "2607.27112",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2607.27112"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:cond-mat.str-el",
      "subfield": "condensed-matter"
    }
  ],
  "title": "Interaction-induced sign reversal of the orbital magnetic susceptibility in Chern insulators",
  "title_text": "Interaction-induced sign reversal of the orbital magnetic susceptibility in Chern insulators",
  "type": "preprint",
  "updated_at": "2026-11-05T15:20:17Z",
  "url": "https://research.draconitic.com/paper/dbvw8880m5xv8",
  "venue": "arXiv",
  "versions": [
    {
      "doi": "10.1103/4v66-y755",
      "pid": null,
      "relation": "published-as",
      "title": null,
      "venue": null
    }
  ]
}