{"paper":{"title":"Cavity-Induced Excitonic Insulation and Non-Fermi-Liquid Behavior in Dirac Materials","license":"http://creativecommons.org/licenses/by/4.0/","headline":"Cavity-mediated long-range interactions turn two-dimensional Dirac fermions into an excitonic insulator below a critical flavor number or a non-Fermi liquid above it.","cross_cats":[],"primary_cat":"cond-mat.str-el","authors_text":"Yuto Ashida, Yuxuan Guo","submitted_at":"2026-05-11T14:37:12Z","abstract_excerpt":"We investigate two-dimensional Dirac fermions embedded in a deep-subwavelength cavity formed by high-impedance metasurfaces. We point out that, unlike conventional metallic boundaries, these metasurfaces support quasielectrostatic transverse-magnetic modes that mediate a long-range interaction between two-dimensional electrons. Combining static electronic screening with a Dyson-Schwinger analysis, we show that this engineered interaction can qualitatively alter the ground-state properties of Dirac materials. For a fermion flavor number $N_{f}$ below a critical value $N_{c}=16/\\pi$, the interac"},"claims":{"count":4,"items":[{"kind":"strongest_claim","text":"For a fermion flavor number N_f below a critical value N_c=16/π, the interaction drives an excitonic insulating phase through an infinite-order quantum phase transition and spontaneously generates a mass gap. At N_f > N_c the system remains gapless but enters a non-Fermi-liquid critical regime.","source":"verdict.strongest_claim","status":"machine_extracted","claim_id":"C1","attestation":"unclaimed"},{"kind":"weakest_assumption","text":"The combination of static electronic screening with a Dyson-Schwinger analysis accurately captures the cavity-induced interaction in the deep-subwavelength limit without significant dynamic screening or higher-order vertex corrections.","source":"verdict.weakest_assumption","status":"machine_extracted","claim_id":"C2","attestation":"unclaimed"},{"kind":"one_line_summary","text":"Cavity-mediated long-range interactions in Dirac materials induce an excitonic insulating phase below N_f = 16/π or a non-Fermi-liquid state with vanishing quasiparticle residue above it.","source":"verdict.one_line_summary","status":"machine_extracted","claim_id":"C3","attestation":"unclaimed"},{"kind":"headline","text":"Cavity-mediated long-range interactions turn two-dimensional Dirac fermions into an excitonic insulator below a critical flavor number or a non-Fermi liquid above it.","source":"verdict.pith_extraction.headline","status":"machine_extracted","claim_id":"C4","attestation":"unclaimed"}],"snapshot_sha256":"1487529fa5dabd960895309b174fc6ddb51b5902232f2c7bec2d7bd05554f086"},"source":{"id":"2605.10652","kind":"arxiv","version":2},"verdict":{"id":"0c8ca51b-1861-43d1-91e9-731b7c53f7b2","model_set":{"reader":"grok-4.3"},"created_at":"2026-05-12T04:28:04.211859Z","strongest_claim":"For a fermion flavor number N_f below a critical value N_c=16/π, the interaction drives an excitonic insulating phase through an infinite-order quantum phase transition and spontaneously generates a mass gap. At N_f > N_c the system remains gapless but enters a non-Fermi-liquid critical regime.","one_line_summary":"Cavity-mediated long-range interactions in Dirac materials induce an excitonic insulating phase below N_f = 16/π or a non-Fermi-liquid state with vanishing quasiparticle residue above it.","pipeline_version":"pith-pipeline@v0.9.0","weakest_assumption":"The combination of static electronic screening with a Dyson-Schwinger analysis accurately captures the cavity-induced interaction in the deep-subwavelength limit without significant dynamic screening or higher-order vertex corrections.","pith_extraction_headline":"Cavity-mediated long-range interactions turn two-dimensional Dirac fermions into an excitonic insulator below a critical flavor number or a non-Fermi liquid above it."},"integrity":{"clean":false,"summary":{"advisory":1,"critical":0,"by_detector":{"doi_compliance":{"total":1,"advisory":1,"critical":0,"informational":0}},"informational":0},"endpoint":"/pith/2605.10652/integrity.json","findings":[{"note":"DOI in the printed bibliography is fragmented by whitespace or line breaks. A longer candidate (10.1142/8964(2020) was visible in the surrounding text but could not be confirmed against doi.org as printed.","detector":"doi_compliance","severity":"advisory","ref_index":2,"audited_at":"2026-05-19T09:05:04.186775Z","detected_doi":"10.1142/8964(2020","finding_type":"recoverable_identifier","verdict_class":"incontrovertible","detected_arxiv_id":null}],"available":true,"detectors_run":[{"name":"claim_evidence","ran_at":"2026-05-20T05:42:00.715761Z","status":"completed","version":"1.0.0","findings_count":0},{"name":"ai_meta_artifact","ran_at":"2026-05-19T14:39:17.997038Z","status":"completed","version":"1.0.0","findings_count":0},{"name":"doi_title_agreement","ran_at":"2026-05-19T11:01:17.305233Z","status":"completed","version":"1.0.0","findings_count":0},{"name":"doi_compliance","ran_at":"2026-05-19T09:05:04.186775Z","status":"completed","version":"1.0.0","findings_count":1}],"snapshot_sha256":"c97dce8f6d7c9591ad46e2ff13d7714acb6e07be5ac46ef8522910ec12e550f1"},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":3,"snapshot_sha256":"908929524b1fdfa4ce3daeead9fc9ed38344ce97b2aa07d1b38efd0f7ac51e6f"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"}