{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:3QHMN272VAP4KBOO6GYRUN5DJ5","short_pith_number":"pith:3QHMN272","canonical_record":{"source":{"id":"1808.01733","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2018-08-06T05:03:18Z","cross_cats_sorted":[],"title_canon_sha256":"53a3bb76973166978bb4c7af142fa80824c93b05205dd0ee24ac6d6a9cf289f0","abstract_canon_sha256":"3dd8e0545a1123cd095e5efb4610f7254594552b351a7fad380be09348de1899"},"schema_version":"1.0"},"canonical_sha256":"dc0ec6ebfaa81fc505cef1b11a37a34f47d33b9afb2dd66f87ba5e238326a116","source":{"kind":"arxiv","id":"1808.01733","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1808.01733","created_at":"2026-05-17T23:45:37Z"},{"alias_kind":"arxiv_version","alias_value":"1808.01733v2","created_at":"2026-05-17T23:45:37Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1808.01733","created_at":"2026-05-17T23:45:37Z"},{"alias_kind":"pith_short_12","alias_value":"3QHMN272VAP4","created_at":"2026-05-18T12:32:02Z"},{"alias_kind":"pith_short_16","alias_value":"3QHMN272VAP4KBOO","created_at":"2026-05-18T12:32:02Z"},{"alias_kind":"pith_short_8","alias_value":"3QHMN272","created_at":"2026-05-18T12:32:02Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:3QHMN272VAP4KBOO6GYRUN5DJ5","target":"record","payload":{"canonical_record":{"source":{"id":"1808.01733","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2018-08-06T05:03:18Z","cross_cats_sorted":[],"title_canon_sha256":"53a3bb76973166978bb4c7af142fa80824c93b05205dd0ee24ac6d6a9cf289f0","abstract_canon_sha256":"3dd8e0545a1123cd095e5efb4610f7254594552b351a7fad380be09348de1899"},"schema_version":"1.0"},"canonical_sha256":"dc0ec6ebfaa81fc505cef1b11a37a34f47d33b9afb2dd66f87ba5e238326a116","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:45:37.244078Z","signature_b64":"DXZUBmfBmZjEntXbd+E3rc4zWqKbawhJuUoNAcEIcpM4Qg5UYFI+euQ+Qnybme9U3jZGQtPEMNXDr5DQZa9LCQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"dc0ec6ebfaa81fc505cef1b11a37a34f47d33b9afb2dd66f87ba5e238326a116","last_reissued_at":"2026-05-17T23:45:37.243299Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:45:37.243299Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1808.01733","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-17T23:45:37Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"00ADjDRjWs9WmoX5Z4aPKCvwEC40QJylUIB8qPl4tpphYVoicUcQ/vwdnFDW/X/d27Gp6ktPX01lc+00HoaoBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T02:18:46.324093Z"},"content_sha256":"864e7dd16fc51f4d3aabddeb9d7cee600c89a680bb2ec5cbd64bdaad374e5f43","schema_version":"1.0","event_id":"sha256:864e7dd16fc51f4d3aabddeb9d7cee600c89a680bb2ec5cbd64bdaad374e5f43"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:3QHMN272VAP4KBOO6GYRUN5DJ5","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Stress-sign-tunable Poisson's Ratio in Monolayer Blue Phosphorus Oxide","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mtrl-sci","authors_text":"Bowen Zeng, Jin Xiao, Mengqiu Long, Shidong Zhang, Yongli Gao, Yougen Yi, Yulan Dong","submitted_at":"2018-08-06T05:03:18Z","abstract_excerpt":"Negative Poisson's ratio (NPR) materials have attracted tremendous interest due to their unusual physical properties and potential applications. Certain two-dimensional (2D) monolayer materials have also been found to exhibit NPR and the corresponding deformation mechanism varies. In this study, we found, based on first-principles calculations, that the Poisson's ratio (PR) sign of monolayer Blue Phosphorus Oxide (BPO) can be tuned by strain: the PR is positive under uniaxial strain <= -1% but becomes negative under > 0. The deformation mechanism for BPO under strain depends on the mutual comp"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1808.01733","kind":"arxiv","version":2},"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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-17T23:45:37Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"H+T0k74YLKNm/GN+muNEVraNrlN0O1FnnQdTQxXiLlM3vzkrG+ibfi0dpsD577omX+IMGqrBRbPjGe+VUWM9Dg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T02:18:46.324453Z"},"content_sha256":"9aeed187c292817b0880d27831f90e6351a8bea7ee05a4d8b539e0ab8e14408c","schema_version":"1.0","event_id":"sha256:9aeed187c292817b0880d27831f90e6351a8bea7ee05a4d8b539e0ab8e14408c"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/3QHMN272VAP4KBOO6GYRUN5DJ5/bundle.json","state_url":"https://pith.science/pith/3QHMN272VAP4KBOO6GYRUN5DJ5/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/3QHMN272VAP4KBOO6GYRUN5DJ5/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-06-03T02:18:46Z","links":{"resolver":"https://pith.science/pith/3QHMN272VAP4KBOO6GYRUN5DJ5","bundle":"https://pith.science/pith/3QHMN272VAP4KBOO6GYRUN5DJ5/bundle.json","state":"https://pith.science/pith/3QHMN272VAP4KBOO6GYRUN5DJ5/state.json","well_known_bundle":"https://pith.science/.well-known/pith/3QHMN272VAP4KBOO6GYRUN5DJ5/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:3QHMN272VAP4KBOO6GYRUN5DJ5","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":"3dd8e0545a1123cd095e5efb4610f7254594552b351a7fad380be09348de1899","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2018-08-06T05:03:18Z","title_canon_sha256":"53a3bb76973166978bb4c7af142fa80824c93b05205dd0ee24ac6d6a9cf289f0"},"schema_version":"1.0","source":{"id":"1808.01733","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1808.01733","created_at":"2026-05-17T23:45:37Z"},{"alias_kind":"arxiv_version","alias_value":"1808.01733v2","created_at":"2026-05-17T23:45:37Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1808.01733","created_at":"2026-05-17T23:45:37Z"},{"alias_kind":"pith_short_12","alias_value":"3QHMN272VAP4","created_at":"2026-05-18T12:32:02Z"},{"alias_kind":"pith_short_16","alias_value":"3QHMN272VAP4KBOO","created_at":"2026-05-18T12:32:02Z"},{"alias_kind":"pith_short_8","alias_value":"3QHMN272","created_at":"2026-05-18T12:32:02Z"}],"graph_snapshots":[{"event_id":"sha256:9aeed187c292817b0880d27831f90e6351a8bea7ee05a4d8b539e0ab8e14408c","target":"graph","created_at":"2026-05-17T23:45:37Z","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":"Negative Poisson's ratio (NPR) materials have attracted tremendous interest due to their unusual physical properties and potential applications. Certain two-dimensional (2D) monolayer materials have also been found to exhibit NPR and the corresponding deformation mechanism varies. In this study, we found, based on first-principles calculations, that the Poisson's ratio (PR) sign of monolayer Blue Phosphorus Oxide (BPO) can be tuned by strain: the PR is positive under uniaxial strain <= -1% but becomes negative under > 0. The deformation mechanism for BPO under strain depends on the mutual comp","authors_text":"Bowen Zeng, Jin Xiao, Mengqiu Long, Shidong Zhang, Yongli Gao, Yougen Yi, Yulan Dong","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2018-08-06T05:03:18Z","title":"Stress-sign-tunable Poisson's Ratio in Monolayer Blue Phosphorus Oxide"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1808.01733","kind":"arxiv","version":2},"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":"sha256:864e7dd16fc51f4d3aabddeb9d7cee600c89a680bb2ec5cbd64bdaad374e5f43","target":"record","created_at":"2026-05-17T23:45:37Z","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":"3dd8e0545a1123cd095e5efb4610f7254594552b351a7fad380be09348de1899","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2018-08-06T05:03:18Z","title_canon_sha256":"53a3bb76973166978bb4c7af142fa80824c93b05205dd0ee24ac6d6a9cf289f0"},"schema_version":"1.0","source":{"id":"1808.01733","kind":"arxiv","version":2}},"canonical_sha256":"dc0ec6ebfaa81fc505cef1b11a37a34f47d33b9afb2dd66f87ba5e238326a116","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"dc0ec6ebfaa81fc505cef1b11a37a34f47d33b9afb2dd66f87ba5e238326a116","first_computed_at":"2026-05-17T23:45:37.243299Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:45:37.243299Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"DXZUBmfBmZjEntXbd+E3rc4zWqKbawhJuUoNAcEIcpM4Qg5UYFI+euQ+Qnybme9U3jZGQtPEMNXDr5DQZa9LCQ==","signature_status":"signed_v1","signed_at":"2026-05-17T23:45:37.244078Z","signed_message":"canonical_sha256_bytes"},"source_id":"1808.01733","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:864e7dd16fc51f4d3aabddeb9d7cee600c89a680bb2ec5cbd64bdaad374e5f43","sha256:9aeed187c292817b0880d27831f90e6351a8bea7ee05a4d8b539e0ab8e14408c"],"state_sha256":"2db771a475c3a08d881de457ca6a37326ba08bb813655bbfc47c1c573feb7440"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"L1MpLSdiCtpSH5rKHKt7+kZaZ0+jxF0ssZAhisUr++gTPas041q6mrZlF5TvnIsDHq+LWND5mEszIidQBXVTCA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-03T02:18:46.326346Z","bundle_sha256":"fbb03bf1b710c3a169ad6c03159bfb3335cd67bd18701b4bb86cd520a8b821d8"}}