{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2018:KNG3PMYHXDACQK3U25ARLEHW4O","short_pith_number":"pith:KNG3PMYH","schema_version":"1.0","canonical_sha256":"534db7b307b8c0282b74d7411590f6e3aa8f249d6d127bc99198870b0947487a","source":{"kind":"arxiv","id":"1806.08063","version":1},"attestation_state":"computed","paper":{"title":"Monolayer Mg$_{2}$C: Negative Poisson's ratio and unconventional 2D emergent fermions","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mes-hall","authors_text":"Liyan Zhu, Shan Guan, Shan-Shan Wang, Shengyuan A. Yang, Xian-Lei Sheng, Ying Liu, Zhi-Ming Yu","submitted_at":"2018-06-21T04:36:24Z","abstract_excerpt":"Novel two-dimensional (2D) emergent fermions and negative Poisson's ratio in 2D materials are fascinating subjects of research. Here, based on first-principles calculations and theoretical analysis, we predict that the hexacoordinated Mg$_{2}$C monolayer hosts both exotic properties. We analyze its phonon spectrum, reveal the Raman active modes, and show that it has small in-plane stiffness constants. Particularly, under the tensile strain in the zigzag direction, the Mg$_{2}$C monolayer shows an intrinsic negative Poisson's ratio $\\sim -0.023$, stemming from its unique puckered hinge structur"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"1806.08063","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2018-06-21T04:36:24Z","cross_cats_sorted":[],"title_canon_sha256":"d83903112c89aa7f0f4cb38bf6764f06c056a8ae73688a1e409f1c885004cc34","abstract_canon_sha256":"944fe9234281b4b6139eb99662558db9f57677fe822db2d2841c7eb3d9efb4f5"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:02:34.142970Z","signature_b64":"F3oRhWgV4u1UNxFFjQWvhYoHodb+/Hxp8ZbfqUHvrAOtgZQOtM8ePLIMHArLiq8GP33brqkZ5EOQxntwk4bFDA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"534db7b307b8c0282b74d7411590f6e3aa8f249d6d127bc99198870b0947487a","last_reissued_at":"2026-05-18T00:02:34.142326Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:02:34.142326Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Monolayer Mg$_{2}$C: Negative Poisson's ratio and unconventional 2D emergent fermions","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mes-hall","authors_text":"Liyan Zhu, Shan Guan, Shan-Shan Wang, Shengyuan A. Yang, Xian-Lei Sheng, Ying Liu, Zhi-Ming Yu","submitted_at":"2018-06-21T04:36:24Z","abstract_excerpt":"Novel two-dimensional (2D) emergent fermions and negative Poisson's ratio in 2D materials are fascinating subjects of research. Here, based on first-principles calculations and theoretical analysis, we predict that the hexacoordinated Mg$_{2}$C monolayer hosts both exotic properties. We analyze its phonon spectrum, reveal the Raman active modes, and show that it has small in-plane stiffness constants. Particularly, under the tensile strain in the zigzag direction, the Mg$_{2}$C monolayer shows an intrinsic negative Poisson's ratio $\\sim -0.023$, stemming from its unique puckered hinge structur"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1806.08063","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"aliases":[{"alias_kind":"arxiv","alias_value":"1806.08063","created_at":"2026-05-18T00:02:34.142420+00:00"},{"alias_kind":"arxiv_version","alias_value":"1806.08063v1","created_at":"2026-05-18T00:02:34.142420+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1806.08063","created_at":"2026-05-18T00:02:34.142420+00:00"},{"alias_kind":"pith_short_12","alias_value":"KNG3PMYHXDAC","created_at":"2026-05-18T12:32:33.847187+00:00"},{"alias_kind":"pith_short_16","alias_value":"KNG3PMYHXDACQK3U","created_at":"2026-05-18T12:32:33.847187+00:00"},{"alias_kind":"pith_short_8","alias_value":"KNG3PMYH","created_at":"2026-05-18T12:32:33.847187+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/KNG3PMYHXDACQK3U25ARLEHW4O","json":"https://pith.science/pith/KNG3PMYHXDACQK3U25ARLEHW4O.json","graph_json":"https://pith.science/api/pith-number/KNG3PMYHXDACQK3U25ARLEHW4O/graph.json","events_json":"https://pith.science/api/pith-number/KNG3PMYHXDACQK3U25ARLEHW4O/events.json","paper":"https://pith.science/paper/KNG3PMYH"},"agent_actions":{"view_html":"https://pith.science/pith/KNG3PMYHXDACQK3U25ARLEHW4O","download_json":"https://pith.science/pith/KNG3PMYHXDACQK3U25ARLEHW4O.json","view_paper":"https://pith.science/paper/KNG3PMYH","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1806.08063&json=true","fetch_graph":"https://pith.science/api/pith-number/KNG3PMYHXDACQK3U25ARLEHW4O/graph.json","fetch_events":"https://pith.science/api/pith-number/KNG3PMYHXDACQK3U25ARLEHW4O/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/KNG3PMYHXDACQK3U25ARLEHW4O/action/timestamp_anchor","attest_storage":"https://pith.science/pith/KNG3PMYHXDACQK3U25ARLEHW4O/action/storage_attestation","attest_author":"https://pith.science/pith/KNG3PMYHXDACQK3U25ARLEHW4O/action/author_attestation","sign_citation":"https://pith.science/pith/KNG3PMYHXDACQK3U25ARLEHW4O/action/citation_signature","submit_replication":"https://pith.science/pith/KNG3PMYHXDACQK3U25ARLEHW4O/action/replication_record"}},"created_at":"2026-05-18T00:02:34.142420+00:00","updated_at":"2026-05-18T00:02:34.142420+00:00"}