{"paper":{"title":"Flat Topological Nodal Lines in Heavy-Fermion Compound CeCoGe$_3$","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"Correlations, spin-orbit coupling and I4mm symmetry stabilize flat topological nodal lines within 10 meV of the Fermi level in CeCoGe₃.","cross_cats":[],"primary_cat":"cond-mat.str-el","authors_text":"JianZhou Zhao, Weikang Wu, Yuting Wang","submitted_at":"2026-03-07T00:59:40Z","abstract_excerpt":"The interplay between strong electronic correlations, unconventional superconductivity, and symmetry-protected topology provides a fertile ground for discovering exotic quantum states. In this work, we investigate the correlated electronic structure and topological properties of the heavy fermion material CeCoGe$_3$ using density functional theory combined with dynamical mean-field theory calculations. Our results reveal a crossover from high temperature incoherent states to low temperature coherent heavy quasiparticles, accompanied by a mass enhancement of $m^*/m_{\\text{DFT}}\\sim 52.6$ at $T="},"claims":{"count":4,"items":[{"kind":"strongest_claim","text":"The interplay between electronic correlation, spin-orbit coupling and the noncentrosymmetric I4mm crystal symmetry stabilize flat topological nodal lines within 10 meV of the Fermi level, which could contribute a significant density of states.","source":"verdict.strongest_claim","status":"machine_extracted","claim_id":"C1","attestation":"unclaimed"},{"kind":"weakest_assumption","text":"That the DFT+DMFT calculations faithfully reproduce the topological character and flatness of the nodal lines without significant artifacts from the chosen interaction parameters or the single-site DMFT approximation.","source":"verdict.weakest_assumption","status":"machine_extracted","claim_id":"C2","attestation":"unclaimed"},{"kind":"one_line_summary","text":"CeCoGe3 is a topological nodal line Kondo semimetal in which correlations and spin-orbit coupling stabilize flat nodal lines near the Fermi level that may mediate pressure-induced superconductivity.","source":"verdict.one_line_summary","status":"machine_extracted","claim_id":"C3","attestation":"unclaimed"},{"kind":"headline","text":"Correlations, spin-orbit coupling and I4mm symmetry stabilize flat topological nodal lines within 10 meV of the Fermi level in CeCoGe₃.","source":"verdict.pith_extraction.headline","status":"machine_extracted","claim_id":"C4","attestation":"unclaimed"}],"snapshot_sha256":"35b377baa968b5efa80898620772ac6a2dedf56c9966c6c2273f74bccf3de7c3"},"source":{"id":"2603.06966","kind":"arxiv","version":1},"verdict":{"id":"11999dd1-0fab-4d6e-9d20-abcaf4a50694","model_set":{"reader":"grok-4.3"},"created_at":"2026-05-15T15:46:27.278177Z","strongest_claim":"The interplay between electronic correlation, spin-orbit coupling and the noncentrosymmetric I4mm crystal symmetry stabilize flat topological nodal lines within 10 meV of the Fermi level, which could contribute a significant density of states.","one_line_summary":"CeCoGe3 is a topological nodal line Kondo semimetal in which correlations and spin-orbit coupling stabilize flat nodal lines near the Fermi level that may mediate pressure-induced superconductivity.","pipeline_version":"pith-pipeline@v0.9.0","weakest_assumption":"That the DFT+DMFT calculations faithfully reproduce the topological character and flatness of the nodal lines without significant artifacts from the chosen interaction parameters or the single-site DMFT approximation.","pith_extraction_headline":"Correlations, spin-orbit coupling and I4mm symmetry stabilize flat topological nodal lines within 10 meV of the Fermi level in CeCoGe₃."},"references":{"count":73,"sample":[{"doi":"","year":2018,"title":"N. Armitage, E. Mele, and A. Vishwanath, Weyl and Dirac semimetals in three-dimensional solids, Reviews of Modern Physics90, 015001 (2018)","work_id":"ad805d97-7a64-447f-93d8-0a9c7c90d2b9","ref_index":1,"cited_arxiv_id":"","is_internal_anchor":false},{"doi":"","year":2012,"title":"C. Fang, M. J. Gilbert, X. Dai, and B. A. Bernevig, Multi- Weyl Topological Semimetals Stabilized by Point Group Symmetry, Physical Review Letters108, 266802 (2012)","work_id":"b66a83de-4e82-4dc3-a41d-eb13489eba6b","ref_index":2,"cited_arxiv_id":"","is_internal_anchor":false},{"doi":"","year":2016,"title":"B. Bradlyn, J. Cano, Z. Wang, M. G. Vergniory, C. Felser, R. J. Cava, and B. A. Bernevig, Beyond Dirac and Weyl fermions: Unconventional quasiparticles in conventional crystals, Science353, aaf5037 (2","work_id":"d5d13576-61ca-4130-a7e1-a160a1971da6","ref_index":3,"cited_arxiv_id":"","is_internal_anchor":false},{"doi":"","year":2016,"title":"Z. Zhu, G. W. Winkler, Q. Wu, J. Li, and A. A. Soluyanov, Triple Point Topological Metals, Physical Review X6, 031003 (2016)","work_id":"8f453a09-7141-4e0d-8cc8-f226ac01cce4","ref_index":4,"cited_arxiv_id":"","is_internal_anchor":false},{"doi":"","year":2022,"title":"Z.-M. Yu, Z. Zhang, G.-B. Liu, W. Wu, X.-P. Li, R.-W. Zhang, S. A. Yang, and Y. Yao, Encyclopedia of emergent particles in three-dimensional crystals, Science Bulletin 67, 375 (2022)","work_id":"599fc61a-f856-4cc2-a4a0-02e4127377cc","ref_index":5,"cited_arxiv_id":"","is_internal_anchor":false}],"resolved_work":73,"snapshot_sha256":"a77cb90e5605923e17fc93b923aaafe5f96a50e2cf523e632d69fd85da39b97a","internal_anchors":1},"formal_canon":{"evidence_count":2,"snapshot_sha256":"5ccff8730a9593e95d910cbdd495b5f4ef1d952efe08390e93049a6b27b6b83e"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"}