{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2020:FURAUEY7V2OCWOQCES2KIQNIY3","short_pith_number":"pith:FURAUEY7","canonical_record":{"source":{"id":"2001.08933","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2020-01-24T10:00:32Z","cross_cats_sorted":[],"title_canon_sha256":"e28e6a4611d1a601c902c503f829d7641111df2cab6a48c75fe5f118450ccc84","abstract_canon_sha256":"512471e1711c95fba7f6fa2a6a2ac8e680a1ed4cdb576e2e78c1558dc251076c"},"schema_version":"1.0"},"canonical_sha256":"2d220a131fae9c2b3a0224b4a441a8c6e217cdd36b29c670a7b64f94d1de0d4a","source":{"kind":"arxiv","id":"2001.08933","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2001.08933","created_at":"2026-07-05T00:58:47Z"},{"alias_kind":"arxiv_version","alias_value":"2001.08933v2","created_at":"2026-07-05T00:58:47Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2001.08933","created_at":"2026-07-05T00:58:47Z"},{"alias_kind":"pith_short_12","alias_value":"FURAUEY7V2OC","created_at":"2026-07-05T00:58:47Z"},{"alias_kind":"pith_short_16","alias_value":"FURAUEY7V2OCWOQC","created_at":"2026-07-05T00:58:47Z"},{"alias_kind":"pith_short_8","alias_value":"FURAUEY7","created_at":"2026-07-05T00:58:47Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2020:FURAUEY7V2OCWOQCES2KIQNIY3","target":"record","payload":{"canonical_record":{"source":{"id":"2001.08933","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2020-01-24T10:00:32Z","cross_cats_sorted":[],"title_canon_sha256":"e28e6a4611d1a601c902c503f829d7641111df2cab6a48c75fe5f118450ccc84","abstract_canon_sha256":"512471e1711c95fba7f6fa2a6a2ac8e680a1ed4cdb576e2e78c1558dc251076c"},"schema_version":"1.0"},"canonical_sha256":"2d220a131fae9c2b3a0224b4a441a8c6e217cdd36b29c670a7b64f94d1de0d4a","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T00:58:47.401458Z","signature_b64":"aeGKHSnsbgkheSSObo3fIyR18IBnZ+9dQCc/CvVF25mVtGEHztoPCVVS3XJljqvb95kuaAEjrrbEQXQowLOuDw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"2d220a131fae9c2b3a0224b4a441a8c6e217cdd36b29c670a7b64f94d1de0d4a","last_reissued_at":"2026-07-05T00:58:47.401030Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T00:58:47.401030Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2001.08933","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":"2026-07-05T00:58:47Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"rLv9u9v2ayalQaS8D8je80MiGpwVSLgA3H6zMwVEnEZ69iPTVBZJIg/vcai90vUXe9OoOBsHpzySrG9vw8H4Ag==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-03T17:15:29.043610Z"},"content_sha256":"2036f85ce419e948c38d5874e0d6ba417bde877ef5be0343181a37c5a8eda928","schema_version":"1.0","event_id":"sha256:2036f85ce419e948c38d5874e0d6ba417bde877ef5be0343181a37c5a8eda928"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2020:FURAUEY7V2OCWOQCES2KIQNIY3","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Adaptive hard and tough mechanical response in single-crystal B1 VNx ceramics via control of anion vacancies","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mtrl-sci","authors_text":"A.B. Mei, D.G. Sangiovanni, E. Broitman, H. Kindlund, I. Petrov, J.E. Greene, L. Hultman","submitted_at":"2020-01-24T10:00:32Z","abstract_excerpt":"High hardness and toughness are generally considered mutually exclusive properties for single-crystal ceramics. Combining experiments and ab initio molecular dynamics (AIMD) atomistic simulations at room temperature, we demonstrate that both the hardness and toughness of single-crystal NaCl-structure VNx/MgO(001) thin films are simultaneously enhanced through the incorporation of anion vacancies. Nanoindentation results show that VN0.8, here considered as representative understoichiometric VNx system, is ~20% harder, as well as more resistant to fracture than stoichiometric VN samples. AIMD mo"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2001.08933","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2001.08933/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":"2026-07-05T00:58:47Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"RQBcI+I4hOW1l5lukB5WshpruuGH59dYPLWxEXAS8K16UNDWnq8TmNWHznQMXOXeTVGu6KdPZfLQO98K8s7FAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-03T17:15:29.044094Z"},"content_sha256":"492678a1a8b777e336e4ddc8241cdf41e9e9e9cd9706e16f9bab7733eec069b5","schema_version":"1.0","event_id":"sha256:492678a1a8b777e336e4ddc8241cdf41e9e9e9cd9706e16f9bab7733eec069b5"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/FURAUEY7V2OCWOQCES2KIQNIY3/bundle.json","state_url":"https://pith.science/pith/FURAUEY7V2OCWOQCES2KIQNIY3/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/FURAUEY7V2OCWOQCES2KIQNIY3/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":"2026-08-03T17:15:29Z","links":{"resolver":"https://pith.science/pith/FURAUEY7V2OCWOQCES2KIQNIY3","bundle":"https://pith.science/pith/FURAUEY7V2OCWOQCES2KIQNIY3/bundle.json","state":"https://pith.science/pith/FURAUEY7V2OCWOQCES2KIQNIY3/state.json","well_known_bundle":"https://pith.science/.well-known/pith/FURAUEY7V2OCWOQCES2KIQNIY3/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2020:FURAUEY7V2OCWOQCES2KIQNIY3","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":"512471e1711c95fba7f6fa2a6a2ac8e680a1ed4cdb576e2e78c1558dc251076c","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2020-01-24T10:00:32Z","title_canon_sha256":"e28e6a4611d1a601c902c503f829d7641111df2cab6a48c75fe5f118450ccc84"},"schema_version":"1.0","source":{"id":"2001.08933","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2001.08933","created_at":"2026-07-05T00:58:47Z"},{"alias_kind":"arxiv_version","alias_value":"2001.08933v2","created_at":"2026-07-05T00:58:47Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2001.08933","created_at":"2026-07-05T00:58:47Z"},{"alias_kind":"pith_short_12","alias_value":"FURAUEY7V2OC","created_at":"2026-07-05T00:58:47Z"},{"alias_kind":"pith_short_16","alias_value":"FURAUEY7V2OCWOQC","created_at":"2026-07-05T00:58:47Z"},{"alias_kind":"pith_short_8","alias_value":"FURAUEY7","created_at":"2026-07-05T00:58:47Z"}],"graph_snapshots":[{"event_id":"sha256:492678a1a8b777e336e4ddc8241cdf41e9e9e9cd9706e16f9bab7733eec069b5","target":"graph","created_at":"2026-07-05T00:58:47Z","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/2001.08933/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"High hardness and toughness are generally considered mutually exclusive properties for single-crystal ceramics. Combining experiments and ab initio molecular dynamics (AIMD) atomistic simulations at room temperature, we demonstrate that both the hardness and toughness of single-crystal NaCl-structure VNx/MgO(001) thin films are simultaneously enhanced through the incorporation of anion vacancies. Nanoindentation results show that VN0.8, here considered as representative understoichiometric VNx system, is ~20% harder, as well as more resistant to fracture than stoichiometric VN samples. AIMD mo","authors_text":"A.B. Mei, D.G. Sangiovanni, E. Broitman, H. Kindlund, I. Petrov, J.E. Greene, L. Hultman","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2020-01-24T10:00:32Z","title":"Adaptive hard and tough mechanical response in single-crystal B1 VNx ceramics via control of anion vacancies"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2001.08933","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":"sha256:2036f85ce419e948c38d5874e0d6ba417bde877ef5be0343181a37c5a8eda928","target":"record","created_at":"2026-07-05T00:58:47Z","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":"512471e1711c95fba7f6fa2a6a2ac8e680a1ed4cdb576e2e78c1558dc251076c","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2020-01-24T10:00:32Z","title_canon_sha256":"e28e6a4611d1a601c902c503f829d7641111df2cab6a48c75fe5f118450ccc84"},"schema_version":"1.0","source":{"id":"2001.08933","kind":"arxiv","version":2}},"canonical_sha256":"2d220a131fae9c2b3a0224b4a441a8c6e217cdd36b29c670a7b64f94d1de0d4a","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"2d220a131fae9c2b3a0224b4a441a8c6e217cdd36b29c670a7b64f94d1de0d4a","first_computed_at":"2026-07-05T00:58:47.401030Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T00:58:47.401030Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"aeGKHSnsbgkheSSObo3fIyR18IBnZ+9dQCc/CvVF25mVtGEHztoPCVVS3XJljqvb95kuaAEjrrbEQXQowLOuDw==","signature_status":"signed_v1","signed_at":"2026-07-05T00:58:47.401458Z","signed_message":"canonical_sha256_bytes"},"source_id":"2001.08933","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:2036f85ce419e948c38d5874e0d6ba417bde877ef5be0343181a37c5a8eda928","sha256:492678a1a8b777e336e4ddc8241cdf41e9e9e9cd9706e16f9bab7733eec069b5"],"state_sha256":"94fd5b9018d48b07bc263d2b65d385785254ef239e1c49950cdc6b903b32661f"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"XQIhsRjIGDKDL0HFLQOPIMB5kLihSE1nbNKTnb9bVgL51JwpHNTleZ3GUSoPZB59wj8JQ0JkJTUqf6bLITUYBA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-03T17:15:29.047461Z","bundle_sha256":"d18c3f8f72f92fee084e3477be843ac836d38fea60ea4de75aec2f9f9cea8d61"}}