{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2009:XVZODDHJAQAZ6DLSL5AQU5SXCW","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"1a1a0fe25f0b9b19f61f81b31268aa6353efa29356594b18d660ba44c87ad178","cross_cats_sorted":["cond-mat.supr-con"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2009-10-06T09:38:16Z","title_canon_sha256":"a8ef2b10f0011d5a6e33e905279e925655b2b2cb6a0cec1cc45391d2374f5993"},"schema_version":"1.0","source":{"id":"0910.0956","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0910.0956","created_at":"2026-05-18T02:11:26Z"},{"alias_kind":"arxiv_version","alias_value":"0910.0956v1","created_at":"2026-05-18T02:11:26Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0910.0956","created_at":"2026-05-18T02:11:26Z"},{"alias_kind":"pith_short_12","alias_value":"XVZODDHJAQAZ","created_at":"2026-05-18T12:26:02Z"},{"alias_kind":"pith_short_16","alias_value":"XVZODDHJAQAZ6DLS","created_at":"2026-05-18T12:26:02Z"},{"alias_kind":"pith_short_8","alias_value":"XVZODDHJ","created_at":"2026-05-18T12:26:02Z"}],"graph_snapshots":[{"event_id":"sha256:fd190649e54b353c7f279c4b144c8a5a023c4ab32a84a985d0d6fa14abf70e54","target":"graph","created_at":"2026-05-18T02:11:26Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"paper":{"abstract_excerpt":"We investigate the charge density wave (CDW) instability in single and double layers, as well as in the bulk 2H-NbSe$_{2}$. We demonstrate that the density functional theory correctly describes the metallic CDW state in the bulk 2H-NbSe$_{2}$. We predict that both mono- and bilayer NbSe$_{2}$ undergo a CDW instability. However, while in the bulk the instability occurs at a momentum $\\mathbf{q}_{CDW}\\approx{2/3}\\mathbf{\\Gamma M}$, in free-standing layers it occurs at $\\mathbf{q}_{CDW}\\approx{1/2}\\mathbf{\\Gamma M}$. Furthermore, while in the bulk the CDW leads to a metallic state, in a monolayer","authors_text":"Francesco Mauri, I. I. Mazin, Matteo Calandra","cross_cats":["cond-mat.supr-con"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2009-10-06T09:38:16Z","title":"Effect of dimensionality on the charge-density-wave in few-layers 2H-NbSe$_2$"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0910.0956","kind":"arxiv","version":1},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:81b2de4c7b687fc7aac2fb934e047def7a04067194eb5e01ad29db78cd9232d8","target":"record","created_at":"2026-05-18T02:11:26Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"1a1a0fe25f0b9b19f61f81b31268aa6353efa29356594b18d660ba44c87ad178","cross_cats_sorted":["cond-mat.supr-con"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2009-10-06T09:38:16Z","title_canon_sha256":"a8ef2b10f0011d5a6e33e905279e925655b2b2cb6a0cec1cc45391d2374f5993"},"schema_version":"1.0","source":{"id":"0910.0956","kind":"arxiv","version":1}},"canonical_sha256":"bd72e18ce904019f0d725f410a765715ab93ddeec939fa1f175428430f9edb19","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"bd72e18ce904019f0d725f410a765715ab93ddeec939fa1f175428430f9edb19","first_computed_at":"2026-05-18T02:11:26.359493Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:11:26.359493Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"IKDj0sMlb29eHqSm1cDqX9DUwPoOdRgp3wUJNx2gHqDxUTFZWg8cRuyYgggkaZjrF48TYqHga/kv6H9swvI7BQ==","signature_status":"signed_v1","signed_at":"2026-05-18T02:11:26.360530Z","signed_message":"canonical_sha256_bytes"},"source_id":"0910.0956","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:81b2de4c7b687fc7aac2fb934e047def7a04067194eb5e01ad29db78cd9232d8","sha256:fd190649e54b353c7f279c4b144c8a5a023c4ab32a84a985d0d6fa14abf70e54"],"state_sha256":"7cc6f1033393e743f8563ba94a57eb5d90fadc888d595c87c63791e5d8902a56"}