{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:HXDG22BTP2WSL7GUC6TR5MFYNT","short_pith_number":"pith:HXDG22BT","canonical_record":{"source":{"id":"1908.04399","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2019-08-12T21:25:31Z","cross_cats_sorted":[],"title_canon_sha256":"4e199279a0358808c0e503e8e123603bc3b6720e63113a1103676000d5c0be71","abstract_canon_sha256":"db0ad76ce73e8e84f9fdeaaeab2dbae0b6e7d6ee8d08f7226e9ec512b6bc459d"},"schema_version":"1.0"},"canonical_sha256":"3dc66d68337ead25fcd417a71eb0b86ce92bcfde99a9c23b0644c85ba28247ca","source":{"kind":"arxiv","id":"1908.04399","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1908.04399","created_at":"2026-07-05T00:58:36Z"},{"alias_kind":"arxiv_version","alias_value":"1908.04399v1","created_at":"2026-07-05T00:58:36Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1908.04399","created_at":"2026-07-05T00:58:36Z"},{"alias_kind":"pith_short_12","alias_value":"HXDG22BTP2WS","created_at":"2026-07-05T00:58:36Z"},{"alias_kind":"pith_short_16","alias_value":"HXDG22BTP2WSL7GU","created_at":"2026-07-05T00:58:36Z"},{"alias_kind":"pith_short_8","alias_value":"HXDG22BT","created_at":"2026-07-05T00:58:36Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:HXDG22BTP2WSL7GUC6TR5MFYNT","target":"record","payload":{"canonical_record":{"source":{"id":"1908.04399","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2019-08-12T21:25:31Z","cross_cats_sorted":[],"title_canon_sha256":"4e199279a0358808c0e503e8e123603bc3b6720e63113a1103676000d5c0be71","abstract_canon_sha256":"db0ad76ce73e8e84f9fdeaaeab2dbae0b6e7d6ee8d08f7226e9ec512b6bc459d"},"schema_version":"1.0"},"canonical_sha256":"3dc66d68337ead25fcd417a71eb0b86ce92bcfde99a9c23b0644c85ba28247ca","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T00:58:36.621589Z","signature_b64":"f2kI6NZHosQdYgRqOMZ17+yKjaQxfJqsKdu90POJFp4bHCLTmEgOUz4PMtSCD4JCHkCBtlkXWN45TQdLjPeZAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"3dc66d68337ead25fcd417a71eb0b86ce92bcfde99a9c23b0644c85ba28247ca","last_reissued_at":"2026-07-05T00:58:36.621105Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T00:58:36.621105Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1908.04399","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":"2026-07-05T00:58:36Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"qvwOY/Teno6HmrM4nK8rEU9fNWyrTLWYDbux6HPRbc0NpYlgc4KSohGjYxo+97pJR1XM/6caxWqvM7YtuZCMCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-17T16:48:27.792761Z"},"content_sha256":"2c50ba7114bd6230160454b2fbba42290983085bee29089cfbee8d3ad79a71bf","schema_version":"1.0","event_id":"sha256:2c50ba7114bd6230160454b2fbba42290983085bee29089cfbee8d3ad79a71bf"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:HXDG22BTP2WSL7GUC6TR5MFYNT","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Directional bonding explains high conductance values of atomic contacts in bcc metals","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mes-hall","authors_text":"A. E. Botha, C. Sabater, C. Untiedt, J. J. Palacios, M. J. Caturla, M. R. Calvo, W. Dednam","submitted_at":"2019-08-12T21:25:31Z","abstract_excerpt":"Atomic-sized junctions of iron, created by controlled rupture, present unusually high values of conductance compared to other metals. This result is counter-intuitive since, at the nanoscale, body-centered cubic metals are expected to exhibit lower coordination than face-centered cubic metals. In this work, classical molecular dynamics simulations of contact rupture, using an interatomic potential that accounts for directional bonding, yield highly-coordinated stable structures before rupture, unlike an isotropic bonding potential, which results in the expected stable single-atom contacts. Den"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1908.04399","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/1908.04399/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2026-07-05T00:58:36Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"VSYcNpWZOHZ98dDD93S45PNHgFlgEmF/t5+qnIeLvTIb+0b3+ZTotvjONsmATxs2y8rBkyFVXcDIHQPDbm2zAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-17T16:48:27.793600Z"},"content_sha256":"a7099cb8abc13b8beb6ca4cac9e1b403d4d9c1dd13647e40bb0f762e4bd3a574","schema_version":"1.0","event_id":"sha256:a7099cb8abc13b8beb6ca4cac9e1b403d4d9c1dd13647e40bb0f762e4bd3a574"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/HXDG22BTP2WSL7GUC6TR5MFYNT/bundle.json","state_url":"https://pith.science/pith/HXDG22BTP2WSL7GUC6TR5MFYNT/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/HXDG22BTP2WSL7GUC6TR5MFYNT/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":"2026-08-17T16:48:27Z","links":{"resolver":"https://pith.science/pith/HXDG22BTP2WSL7GUC6TR5MFYNT","bundle":"https://pith.science/pith/HXDG22BTP2WSL7GUC6TR5MFYNT/bundle.json","state":"https://pith.science/pith/HXDG22BTP2WSL7GUC6TR5MFYNT/state.json","well_known_bundle":"https://pith.science/.well-known/pith/HXDG22BTP2WSL7GUC6TR5MFYNT/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:HXDG22BTP2WSL7GUC6TR5MFYNT","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":"db0ad76ce73e8e84f9fdeaaeab2dbae0b6e7d6ee8d08f7226e9ec512b6bc459d","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2019-08-12T21:25:31Z","title_canon_sha256":"4e199279a0358808c0e503e8e123603bc3b6720e63113a1103676000d5c0be71"},"schema_version":"1.0","source":{"id":"1908.04399","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1908.04399","created_at":"2026-07-05T00:58:36Z"},{"alias_kind":"arxiv_version","alias_value":"1908.04399v1","created_at":"2026-07-05T00:58:36Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1908.04399","created_at":"2026-07-05T00:58:36Z"},{"alias_kind":"pith_short_12","alias_value":"HXDG22BTP2WS","created_at":"2026-07-05T00:58:36Z"},{"alias_kind":"pith_short_16","alias_value":"HXDG22BTP2WSL7GU","created_at":"2026-07-05T00:58:36Z"},{"alias_kind":"pith_short_8","alias_value":"HXDG22BT","created_at":"2026-07-05T00:58:36Z"}],"graph_snapshots":[{"event_id":"sha256:a7099cb8abc13b8beb6ca4cac9e1b403d4d9c1dd13647e40bb0f762e4bd3a574","target":"graph","created_at":"2026-07-05T00:58:36Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/1908.04399/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Atomic-sized junctions of iron, created by controlled rupture, present unusually high values of conductance compared to other metals. This result is counter-intuitive since, at the nanoscale, body-centered cubic metals are expected to exhibit lower coordination than face-centered cubic metals. In this work, classical molecular dynamics simulations of contact rupture, using an interatomic potential that accounts for directional bonding, yield highly-coordinated stable structures before rupture, unlike an isotropic bonding potential, which results in the expected stable single-atom contacts. Den","authors_text":"A. E. Botha, C. Sabater, C. Untiedt, J. J. Palacios, M. J. Caturla, M. R. Calvo, W. Dednam","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2019-08-12T21:25:31Z","title":"Directional bonding explains high conductance values of atomic contacts in bcc metals"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1908.04399","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":"sha256:2c50ba7114bd6230160454b2fbba42290983085bee29089cfbee8d3ad79a71bf","target":"record","created_at":"2026-07-05T00:58:36Z","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":"db0ad76ce73e8e84f9fdeaaeab2dbae0b6e7d6ee8d08f7226e9ec512b6bc459d","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2019-08-12T21:25:31Z","title_canon_sha256":"4e199279a0358808c0e503e8e123603bc3b6720e63113a1103676000d5c0be71"},"schema_version":"1.0","source":{"id":"1908.04399","kind":"arxiv","version":1}},"canonical_sha256":"3dc66d68337ead25fcd417a71eb0b86ce92bcfde99a9c23b0644c85ba28247ca","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"3dc66d68337ead25fcd417a71eb0b86ce92bcfde99a9c23b0644c85ba28247ca","first_computed_at":"2026-07-05T00:58:36.621105Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T00:58:36.621105Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"f2kI6NZHosQdYgRqOMZ17+yKjaQxfJqsKdu90POJFp4bHCLTmEgOUz4PMtSCD4JCHkCBtlkXWN45TQdLjPeZAw==","signature_status":"signed_v1","signed_at":"2026-07-05T00:58:36.621589Z","signed_message":"canonical_sha256_bytes"},"source_id":"1908.04399","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:2c50ba7114bd6230160454b2fbba42290983085bee29089cfbee8d3ad79a71bf","sha256:a7099cb8abc13b8beb6ca4cac9e1b403d4d9c1dd13647e40bb0f762e4bd3a574"],"state_sha256":"0ce18220ea734527b9b62c1004b756b281a3baa0dae88e4250197b662a363d97"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"z7DuHW7sYn228SktpcgXzk3MxH9WkkA68c/nlXQaP52vqVAN9LrSRXt9Az+1EW1Cav0HgyEu9VdEclTKg3v9AA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-17T16:48:27.882194Z","bundle_sha256":"db3f489cdaecb13ac6fd935824cf9400d68b9e75d95744edca2d9ff3509acc0f"}}