{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:4BXW4LSS4GVHDXBFXAUXFIOOSJ","short_pith_number":"pith:4BXW4LSS","canonical_record":{"source":{"id":"1901.06311","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2019-01-18T15:56:58Z","cross_cats_sorted":[],"title_canon_sha256":"10dab5c2df74a2b6f7a97fc37e0c6718d567e28c54bb007fa07af755eed06b57","abstract_canon_sha256":"4f45cae29a8be9b8299ab8c830f871c21be4c819e68a0ddc0149eaef10f1f94a"},"schema_version":"1.0"},"canonical_sha256":"e06f6e2e52e1aa71dc25b82972a1ce9260faa4fbf9127b9b4c6667498e957c49","source":{"kind":"arxiv","id":"1901.06311","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1901.06311","created_at":"2026-05-17T23:55:07Z"},{"alias_kind":"arxiv_version","alias_value":"1901.06311v1","created_at":"2026-05-17T23:55:07Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1901.06311","created_at":"2026-05-17T23:55:07Z"},{"alias_kind":"pith_short_12","alias_value":"4BXW4LSS4GVH","created_at":"2026-05-18T12:33:10Z"},{"alias_kind":"pith_short_16","alias_value":"4BXW4LSS4GVHDXBF","created_at":"2026-05-18T12:33:10Z"},{"alias_kind":"pith_short_8","alias_value":"4BXW4LSS","created_at":"2026-05-18T12:33:10Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:4BXW4LSS4GVHDXBFXAUXFIOOSJ","target":"record","payload":{"canonical_record":{"source":{"id":"1901.06311","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2019-01-18T15:56:58Z","cross_cats_sorted":[],"title_canon_sha256":"10dab5c2df74a2b6f7a97fc37e0c6718d567e28c54bb007fa07af755eed06b57","abstract_canon_sha256":"4f45cae29a8be9b8299ab8c830f871c21be4c819e68a0ddc0149eaef10f1f94a"},"schema_version":"1.0"},"canonical_sha256":"e06f6e2e52e1aa71dc25b82972a1ce9260faa4fbf9127b9b4c6667498e957c49","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:55:07.045440Z","signature_b64":"eo9HpPYQxaIKLjDxIYhdatlf8oTWqBktQ3nsnwpSdZsZrqIdu0TIAssuY0tM/VrJOUcCrc//24HP5K0Ws15TCQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"e06f6e2e52e1aa71dc25b82972a1ce9260faa4fbf9127b9b4c6667498e957c49","last_reissued_at":"2026-05-17T23:55:07.044838Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:55:07.044838Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1901.06311","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":"2026-05-17T23:55:07Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Bmooqv0MbV0tLmvVi80YHfAwU9JJcSTdOrPDUiO+SFEgAsqWFjnNlIrdqy9H8KK3OjFY0RK0GCEZCyHI+bReCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T20:27:47.191272Z"},"content_sha256":"0489b0090c0dce7531a99da245d79aa22923e1ce47585465791a0562f3104905","schema_version":"1.0","event_id":"sha256:0489b0090c0dce7531a99da245d79aa22923e1ce47585465791a0562f3104905"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:4BXW4LSS4GVHDXBFXAUXFIOOSJ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Abrupt changes in the graphene on Ge(001) system at the onset of surface melting","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mtrl-sci","authors_text":"A. M. Scaparro, A. Notargiacomo, A. Sgarlata, C. Coletti, F. Fabbri, L. Di Gaspare, L. Persichetti, M. de Seta, M. Fanfoni, V. Miseikis","submitted_at":"2019-01-18T15:56:58Z","abstract_excerpt":"By combining scanning probe microscopy with Raman and x-ray photoelectron spectroscopies, we investigate the evolution of CVD-grown graphene/Ge(001) as a function of the deposition temperature in close proximity to the Ge melting point, highlighting an abrupt change of the graphene's quality, morphology, electronic properties and growth mode at 930 degrees. We attribute this discontinuity to the incomplete surface melting of the Ge substrate and show how incomplete melting explains a variety of diverse and long-debated peculiar features of the graphene/Ge(001), including the characteristic nan"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1901.06311","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":"2026-05-17T23:55:07Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"OlOOdK1i9iZCjCyUn3xq+bn85mn7OHqpbCnz8spxmgWs/ou9ZKAL3OTPswCItSlArX5nW3L6HhHl+ySOXd3PBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T20:27:47.191646Z"},"content_sha256":"25370294e8f3e963971925edc53cddec4884078fa9bf9adcc1ff8c55760a9c32","schema_version":"1.0","event_id":"sha256:25370294e8f3e963971925edc53cddec4884078fa9bf9adcc1ff8c55760a9c32"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/4BXW4LSS4GVHDXBFXAUXFIOOSJ/bundle.json","state_url":"https://pith.science/pith/4BXW4LSS4GVHDXBFXAUXFIOOSJ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/4BXW4LSS4GVHDXBFXAUXFIOOSJ/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":"2026-06-02T20:27:47Z","links":{"resolver":"https://pith.science/pith/4BXW4LSS4GVHDXBFXAUXFIOOSJ","bundle":"https://pith.science/pith/4BXW4LSS4GVHDXBFXAUXFIOOSJ/bundle.json","state":"https://pith.science/pith/4BXW4LSS4GVHDXBFXAUXFIOOSJ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/4BXW4LSS4GVHDXBFXAUXFIOOSJ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:4BXW4LSS4GVHDXBFXAUXFIOOSJ","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":"4f45cae29a8be9b8299ab8c830f871c21be4c819e68a0ddc0149eaef10f1f94a","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2019-01-18T15:56:58Z","title_canon_sha256":"10dab5c2df74a2b6f7a97fc37e0c6718d567e28c54bb007fa07af755eed06b57"},"schema_version":"1.0","source":{"id":"1901.06311","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1901.06311","created_at":"2026-05-17T23:55:07Z"},{"alias_kind":"arxiv_version","alias_value":"1901.06311v1","created_at":"2026-05-17T23:55:07Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1901.06311","created_at":"2026-05-17T23:55:07Z"},{"alias_kind":"pith_short_12","alias_value":"4BXW4LSS4GVH","created_at":"2026-05-18T12:33:10Z"},{"alias_kind":"pith_short_16","alias_value":"4BXW4LSS4GVHDXBF","created_at":"2026-05-18T12:33:10Z"},{"alias_kind":"pith_short_8","alias_value":"4BXW4LSS","created_at":"2026-05-18T12:33:10Z"}],"graph_snapshots":[{"event_id":"sha256:25370294e8f3e963971925edc53cddec4884078fa9bf9adcc1ff8c55760a9c32","target":"graph","created_at":"2026-05-17T23:55:07Z","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":"By combining scanning probe microscopy with Raman and x-ray photoelectron spectroscopies, we investigate the evolution of CVD-grown graphene/Ge(001) as a function of the deposition temperature in close proximity to the Ge melting point, highlighting an abrupt change of the graphene's quality, morphology, electronic properties and growth mode at 930 degrees. We attribute this discontinuity to the incomplete surface melting of the Ge substrate and show how incomplete melting explains a variety of diverse and long-debated peculiar features of the graphene/Ge(001), including the characteristic nan","authors_text":"A. M. Scaparro, A. Notargiacomo, A. Sgarlata, C. Coletti, F. Fabbri, L. Di Gaspare, L. Persichetti, M. de Seta, M. Fanfoni, V. Miseikis","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2019-01-18T15:56:58Z","title":"Abrupt changes in the graphene on Ge(001) system at the onset of surface melting"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1901.06311","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":"sha256:0489b0090c0dce7531a99da245d79aa22923e1ce47585465791a0562f3104905","target":"record","created_at":"2026-05-17T23:55:07Z","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":"4f45cae29a8be9b8299ab8c830f871c21be4c819e68a0ddc0149eaef10f1f94a","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2019-01-18T15:56:58Z","title_canon_sha256":"10dab5c2df74a2b6f7a97fc37e0c6718d567e28c54bb007fa07af755eed06b57"},"schema_version":"1.0","source":{"id":"1901.06311","kind":"arxiv","version":1}},"canonical_sha256":"e06f6e2e52e1aa71dc25b82972a1ce9260faa4fbf9127b9b4c6667498e957c49","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"e06f6e2e52e1aa71dc25b82972a1ce9260faa4fbf9127b9b4c6667498e957c49","first_computed_at":"2026-05-17T23:55:07.044838Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:55:07.044838Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"eo9HpPYQxaIKLjDxIYhdatlf8oTWqBktQ3nsnwpSdZsZrqIdu0TIAssuY0tM/VrJOUcCrc//24HP5K0Ws15TCQ==","signature_status":"signed_v1","signed_at":"2026-05-17T23:55:07.045440Z","signed_message":"canonical_sha256_bytes"},"source_id":"1901.06311","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:0489b0090c0dce7531a99da245d79aa22923e1ce47585465791a0562f3104905","sha256:25370294e8f3e963971925edc53cddec4884078fa9bf9adcc1ff8c55760a9c32"],"state_sha256":"1aa4d1d68b34acf8243a66e98f47fd6db906a228d0dd99d37c6cb24a7f4b0784"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ldGAULPjwTIAGsC0Q+yt6Zto+MQHjdSkYgqEIWdJjHG/EofbvI4wfJYosb+MqYaeO9GJI4E1G9LNceb3vLnLBg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-02T20:27:47.193630Z","bundle_sha256":"f10b7d9906261cb487ecb3c41d43138093b4b5f2d897c285df3ad45d3c4e5f79"}}