{"paper":{"title":"Visible-NIR-Frequency Hyperbolic Response in Nodal-Line Semimetal PbTaSe$_2$","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"PbTaSe₂ exhibits robust hyperbolic optical behavior in the visible to near-infrared range from its intrinsic anisotropic structure.","cross_cats":["cond-mat.mtrl-sci"],"primary_cat":"physics.optics","authors_text":"Carolina Orona-Navar, Morgan G. Blevins, Simo Pajovic, Svetlana V. Boriskina, Vivian J. Santamaria-Garcia","submitted_at":"2026-05-12T18:02:45Z","abstract_excerpt":"Natural hyperbolic materials offer a powerful platform for light-matter interactions by supporting highly anisotropic electromagnetic modes without the need for artificial patterning. In this work, we experimentally demonstrate that the nodal-line semimetal PbTaSe$_2$ exhibits robust hyperbolic optical behavior in the visible to near-infrared spectral range, which arises intrinsically from its anisotropic electronic structure and layered crystal symmetry. By combining first-principles calculations, ellipsometry, Drude-Lorentz modeling, and reflectance measurements, we establish a consistent ex"},"claims":{"count":4,"items":[{"kind":"strongest_claim","text":"we experimentally demonstrate that the nodal-line semimetal PbTaSe₂ exhibits robust hyperbolic optical behavior in the visible to near-infrared spectral range, which arises intrinsically from its anisotropic electronic structure and layered crystal symmetry","source":"verdict.strongest_claim","status":"machine_extracted","claim_id":"C1","attestation":"unclaimed"},{"kind":"weakest_assumption","text":"The ellipsometry and reflectance data reflect true bulk hyperbolic response rather than surface contamination, defects, or thin-film effects, and the Drude-Lorentz fit accurately separates the plasmonic contribution without post-hoc parameter adjustments.","source":"verdict.weakest_assumption","status":"machine_extracted","claim_id":"C2","attestation":"unclaimed"},{"kind":"one_line_summary","text":"PbTaSe₂ exhibits intrinsic plasmonic hyperbolic response in the visible-NIR range with anisotropy parameter |R| ≈ 231 and quality factor Q_max ≈ 2.8 at 0.78 eV.","source":"verdict.one_line_summary","status":"machine_extracted","claim_id":"C3","attestation":"unclaimed"},{"kind":"headline","text":"PbTaSe₂ exhibits robust hyperbolic optical behavior in the visible to near-infrared range from its intrinsic anisotropic structure.","source":"verdict.pith_extraction.headline","status":"machine_extracted","claim_id":"C4","attestation":"unclaimed"}],"snapshot_sha256":"69bf1ab6c92040d1cd1d4dc64aa93070d8fbf8a63a9cf9a080ce935fc6d2d33b"},"source":{"id":"2605.12611","kind":"arxiv","version":1},"verdict":{"id":"48c8a024-fc37-49ed-b09f-3082d95e2d21","model_set":{"reader":"grok-4.3"},"created_at":"2026-05-14T20:26:01.765087Z","strongest_claim":"we experimentally demonstrate that the nodal-line semimetal PbTaSe₂ exhibits robust hyperbolic optical behavior in the visible to near-infrared spectral range, which arises intrinsically from its anisotropic electronic structure and layered crystal symmetry","one_line_summary":"PbTaSe₂ exhibits intrinsic plasmonic hyperbolic response in the visible-NIR range with anisotropy parameter |R| ≈ 231 and quality factor Q_max ≈ 2.8 at 0.78 eV.","pipeline_version":"pith-pipeline@v0.9.0","weakest_assumption":"The ellipsometry and reflectance data reflect true bulk hyperbolic response rather than surface contamination, defects, or thin-film effects, and the Drude-Lorentz fit accurately separates the plasmonic contribution without post-hoc parameter adjustments.","pith_extraction_headline":"PbTaSe₂ exhibits robust hyperbolic optical behavior in the visible to near-infrared range from its intrinsic anisotropic structure."},"references":{"count":291,"sample":[{"doi":"","year":null,"title":"Nonreciprocal and Exotic Radiative Transfer in Type-I Magnetic Weyl Semimetals , rights=","work_id":"fc30a619-2308-4c55-bed8-4b92a7b247ff","ref_index":1,"cited_arxiv_id":"","is_internal_anchor":false},{"doi":"10.1126/sciadv.add6169","year":null,"title":"and Kim, Brian S","work_id":"7efd8b9d-9b7c-4cc4-a16a-cd157b1cce62","ref_index":2,"cited_arxiv_id":"","is_internal_anchor":false},{"doi":"10.1021/acsanm.2c04340","year":null,"title":"and Bansil, Arun and Galdi, Vincenzo and Agarwal, Amit and Politano, Antonio and Cupolillo, Anna , year=","work_id":"9bb79b05-32e8-4ae1-b987-97b05001b9ac","ref_index":3,"cited_arxiv_id":"","is_internal_anchor":false},{"doi":"10.1103/physrevmaterials.4.085202","year":null,"title":"Physical Review Materials , publisher=","work_id":"d2c7605b-9dad-4206-b3b3-ef4eb01df3c5","ref_index":4,"cited_arxiv_id":"","is_internal_anchor":false},{"doi":"","year":null,"title":"Rodríguez and Gonçalves, P","work_id":"df33e747-be21-4a4f-8ace-25c36bf0d94c","ref_index":5,"cited_arxiv_id":"","is_internal_anchor":false}],"resolved_work":291,"snapshot_sha256":"a0e47f5b1bf311bb007811e32cd9fabc8ba5de079c3370ed11071b3be4189600","internal_anchors":1},"formal_canon":{"evidence_count":2,"snapshot_sha256":"a0e2efeaafbbbe7c173d873ddb31cde99f1056421f227718da7fe6e68e468821"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"}