{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2014:WZKOIMBSRCJ4CTGZTMWISWP3VC","short_pith_number":"pith:WZKOIMBS","canonical_record":{"source":{"id":"1411.1808","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2014-11-07T01:20:28Z","cross_cats_sorted":[],"title_canon_sha256":"67558ce39e503d6c848f38c527ef0ea60c04d6f9bf78def1eee08b689e4a4c55","abstract_canon_sha256":"b9e4cc04b06e054f449617ca1ee46575b6db604d76442047078d1d92f6419924"},"schema_version":"1.0"},"canonical_sha256":"b654e430328893c14cd99b2c8959fba8a1c4b92a029f2ebf8f5c8606a841310d","source":{"kind":"arxiv","id":"1411.1808","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1411.1808","created_at":"2026-05-18T01:41:34Z"},{"alias_kind":"arxiv_version","alias_value":"1411.1808v1","created_at":"2026-05-18T01:41:34Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1411.1808","created_at":"2026-05-18T01:41:34Z"},{"alias_kind":"pith_short_12","alias_value":"WZKOIMBSRCJ4","created_at":"2026-05-18T12:28:54Z"},{"alias_kind":"pith_short_16","alias_value":"WZKOIMBSRCJ4CTGZ","created_at":"2026-05-18T12:28:54Z"},{"alias_kind":"pith_short_8","alias_value":"WZKOIMBS","created_at":"2026-05-18T12:28:54Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2014:WZKOIMBSRCJ4CTGZTMWISWP3VC","target":"record","payload":{"canonical_record":{"source":{"id":"1411.1808","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2014-11-07T01:20:28Z","cross_cats_sorted":[],"title_canon_sha256":"67558ce39e503d6c848f38c527ef0ea60c04d6f9bf78def1eee08b689e4a4c55","abstract_canon_sha256":"b9e4cc04b06e054f449617ca1ee46575b6db604d76442047078d1d92f6419924"},"schema_version":"1.0"},"canonical_sha256":"b654e430328893c14cd99b2c8959fba8a1c4b92a029f2ebf8f5c8606a841310d","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:41:34.202527Z","signature_b64":"z4KSrvoDdKTrMAq5JL9H6emOnEHZAX6BS0mKYS52mHuBA2MjTa/Pdgr9WgQPzbWzK0JcJPGyNpwaCiHzaCDqAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"b654e430328893c14cd99b2c8959fba8a1c4b92a029f2ebf8f5c8606a841310d","last_reissued_at":"2026-05-18T01:41:34.201848Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:41:34.201848Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1411.1808","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T01:41:34Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"nEP9vDZ5uCkgrvu7vcfbNOigz7x2AYJxuMyTqsWtNKhK0yxDr7fe+okX+MKo0rEdenVu/pkcTK6oLR2w9LWHBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-10T11:59:00.448019Z"},"content_sha256":"f82251f0e9fa85eea747f98e3e653d7fa269fb5888a08cd7a424f7a4567e583a","schema_version":"1.0","event_id":"sha256:f82251f0e9fa85eea747f98e3e653d7fa269fb5888a08cd7a424f7a4567e583a"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2014:WZKOIMBSRCJ4CTGZTMWISWP3VC","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Al20+ does melt, albeit above the bulk melting temperature of aluminium","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mtrl-sci","authors_text":"Krista G. Steenbergen, Nicola Gaston, Udbhav Ojha","submitted_at":"2014-11-07T01:20:28Z","abstract_excerpt":"Employing first principles parallel tempering molecular dynamics in the microcanonical ensemble, we report the presence of a clear solid-liquid-like melting transition in Al20+ clusters, not found in experiments. The phase transition temperature obtained from the multiple histogram method is 993 K, 60 K above the melting point of aluminium. Root mean squared bond length fluctuation, the velocity auto-correlation function and the corresponding power spectrum further confirm the phase transition from a solid-like to liquid-like phase. Atoms-In-Molecules analysis shows a strong charge segregation"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1411.1808","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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T01:41:34Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"jG3BaQzATYWSvI5KcGdzS2xDEK0mxygKM4bbiLMI7xSSkP11oXk+EwjfCCVAJVYqjQpA+l8TJucW2y9WF8mFDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-10T11:59:00.448810Z"},"content_sha256":"bdd1c2ee886ebc88462ee5e47e1f0a9423dea62b8af488acbf119b9e3b98b727","schema_version":"1.0","event_id":"sha256:bdd1c2ee886ebc88462ee5e47e1f0a9423dea62b8af488acbf119b9e3b98b727"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/WZKOIMBSRCJ4CTGZTMWISWP3VC/bundle.json","state_url":"https://pith.science/pith/WZKOIMBSRCJ4CTGZTMWISWP3VC/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/WZKOIMBSRCJ4CTGZTMWISWP3VC/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":"2026-06-10T11:59:00Z","links":{"resolver":"https://pith.science/pith/WZKOIMBSRCJ4CTGZTMWISWP3VC","bundle":"https://pith.science/pith/WZKOIMBSRCJ4CTGZTMWISWP3VC/bundle.json","state":"https://pith.science/pith/WZKOIMBSRCJ4CTGZTMWISWP3VC/state.json","well_known_bundle":"https://pith.science/.well-known/pith/WZKOIMBSRCJ4CTGZTMWISWP3VC/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:WZKOIMBSRCJ4CTGZTMWISWP3VC","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":"b9e4cc04b06e054f449617ca1ee46575b6db604d76442047078d1d92f6419924","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2014-11-07T01:20:28Z","title_canon_sha256":"67558ce39e503d6c848f38c527ef0ea60c04d6f9bf78def1eee08b689e4a4c55"},"schema_version":"1.0","source":{"id":"1411.1808","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1411.1808","created_at":"2026-05-18T01:41:34Z"},{"alias_kind":"arxiv_version","alias_value":"1411.1808v1","created_at":"2026-05-18T01:41:34Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1411.1808","created_at":"2026-05-18T01:41:34Z"},{"alias_kind":"pith_short_12","alias_value":"WZKOIMBSRCJ4","created_at":"2026-05-18T12:28:54Z"},{"alias_kind":"pith_short_16","alias_value":"WZKOIMBSRCJ4CTGZ","created_at":"2026-05-18T12:28:54Z"},{"alias_kind":"pith_short_8","alias_value":"WZKOIMBS","created_at":"2026-05-18T12:28:54Z"}],"graph_snapshots":[{"event_id":"sha256:bdd1c2ee886ebc88462ee5e47e1f0a9423dea62b8af488acbf119b9e3b98b727","target":"graph","created_at":"2026-05-18T01:41:34Z","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":"Employing first principles parallel tempering molecular dynamics in the microcanonical ensemble, we report the presence of a clear solid-liquid-like melting transition in Al20+ clusters, not found in experiments. The phase transition temperature obtained from the multiple histogram method is 993 K, 60 K above the melting point of aluminium. Root mean squared bond length fluctuation, the velocity auto-correlation function and the corresponding power spectrum further confirm the phase transition from a solid-like to liquid-like phase. Atoms-In-Molecules analysis shows a strong charge segregation","authors_text":"Krista G. Steenbergen, Nicola Gaston, Udbhav Ojha","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2014-11-07T01:20:28Z","title":"Al20+ does melt, albeit above the bulk melting temperature of aluminium"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1411.1808","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:f82251f0e9fa85eea747f98e3e653d7fa269fb5888a08cd7a424f7a4567e583a","target":"record","created_at":"2026-05-18T01:41:34Z","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":"b9e4cc04b06e054f449617ca1ee46575b6db604d76442047078d1d92f6419924","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2014-11-07T01:20:28Z","title_canon_sha256":"67558ce39e503d6c848f38c527ef0ea60c04d6f9bf78def1eee08b689e4a4c55"},"schema_version":"1.0","source":{"id":"1411.1808","kind":"arxiv","version":1}},"canonical_sha256":"b654e430328893c14cd99b2c8959fba8a1c4b92a029f2ebf8f5c8606a841310d","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"b654e430328893c14cd99b2c8959fba8a1c4b92a029f2ebf8f5c8606a841310d","first_computed_at":"2026-05-18T01:41:34.201848Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:41:34.201848Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"z4KSrvoDdKTrMAq5JL9H6emOnEHZAX6BS0mKYS52mHuBA2MjTa/Pdgr9WgQPzbWzK0JcJPGyNpwaCiHzaCDqAQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:41:34.202527Z","signed_message":"canonical_sha256_bytes"},"source_id":"1411.1808","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:f82251f0e9fa85eea747f98e3e653d7fa269fb5888a08cd7a424f7a4567e583a","sha256:bdd1c2ee886ebc88462ee5e47e1f0a9423dea62b8af488acbf119b9e3b98b727"],"state_sha256":"cd99168f41ee22613524e1e44b116fd6953d5cf851567c2661b72893808d316c"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ouv9E7/xIPLCPkQfX+m/gd1FbU+cMlMM5mqdQ7RXYXVDygqUZq1JZ0QMtyYnONzNWfXk2DMXl96wKlGF97YYDA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-10T11:59:00.452790Z","bundle_sha256":"f8769b8308f2e1cd2be05a6fe1986c3d1c6d5898b45b2998bdc970cf6883c1a8"}}