{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:OCK6Z56O3D5ZWDMK4CVE2DWXJR","short_pith_number":"pith:OCK6Z56O","canonical_record":{"source":{"id":"1805.01495","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2018-05-03T18:22:55Z","cross_cats_sorted":[],"title_canon_sha256":"f7dca77b430515675f8a4906e5525dc35e607d9948f2caea1055832b4eb3d83b","abstract_canon_sha256":"a52a05af24fd157672c8ed3f1cc89919b051244f066ab79bebb12c117b6e87f4"},"schema_version":"1.0"},"canonical_sha256":"7095ecf7ced8fb9b0d8ae0aa4d0ed74c42380ac21febf4065588044708187d53","source":{"kind":"arxiv","id":"1805.01495","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1805.01495","created_at":"2026-05-18T00:16:51Z"},{"alias_kind":"arxiv_version","alias_value":"1805.01495v1","created_at":"2026-05-18T00:16:51Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1805.01495","created_at":"2026-05-18T00:16:51Z"},{"alias_kind":"pith_short_12","alias_value":"OCK6Z56O3D5Z","created_at":"2026-05-18T12:32:43Z"},{"alias_kind":"pith_short_16","alias_value":"OCK6Z56O3D5ZWDMK","created_at":"2026-05-18T12:32:43Z"},{"alias_kind":"pith_short_8","alias_value":"OCK6Z56O","created_at":"2026-05-18T12:32:43Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:OCK6Z56O3D5ZWDMK4CVE2DWXJR","target":"record","payload":{"canonical_record":{"source":{"id":"1805.01495","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2018-05-03T18:22:55Z","cross_cats_sorted":[],"title_canon_sha256":"f7dca77b430515675f8a4906e5525dc35e607d9948f2caea1055832b4eb3d83b","abstract_canon_sha256":"a52a05af24fd157672c8ed3f1cc89919b051244f066ab79bebb12c117b6e87f4"},"schema_version":"1.0"},"canonical_sha256":"7095ecf7ced8fb9b0d8ae0aa4d0ed74c42380ac21febf4065588044708187d53","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:16:51.203873Z","signature_b64":"VnKl4JPQZhBC4MRJVvkBwH3BJixmwmoYkETA2azeQfpzsuk2Drxq7KssyD92rMZQU7v/dV4tE6F6u8dfBPEZDQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"7095ecf7ced8fb9b0d8ae0aa4d0ed74c42380ac21febf4065588044708187d53","last_reissued_at":"2026-05-18T00:16:51.203145Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:16:51.203145Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1805.01495","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":"2026-05-18T00:16:51Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"YlXrH3Nxv6ryn2XZFjQ/0r+P2GEjFMUMzMun03g8F/QX2sQ/kil82bPgQ627VqmF/YkWfdx4Ih3o07qogY3DBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T06:49:24.590565Z"},"content_sha256":"b62b253a80065529542b30fc1628e6e2aa79b7dc357a377b3724dfb8fe0e51a7","schema_version":"1.0","event_id":"sha256:b62b253a80065529542b30fc1628e6e2aa79b7dc357a377b3724dfb8fe0e51a7"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:OCK6Z56O3D5ZWDMK4CVE2DWXJR","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Electronic and magnetic properties of black phosphorus","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.str-el","authors_text":"Andreas Hirsch, Bence G. M\\'arkus, Ferenc Simon, Frank Hauke, Gonzalo Abell\\'an, Julio C. Chac\\'on-Torres, K\\'aroly Nagy, Stefan Wild, Titusz Feh\\'er","submitted_at":"2018-05-03T18:22:55Z","abstract_excerpt":"Black phosphorus has emerged as the next member in the graphene inspired two-dimensional materials family. Its electronic and magnetic properties are studied herein using electron and nuclear magnetic resonance techniques (ESR and NMR) and microwave conductivity measurement. The latter is a unique technique to study conductivity on air sensitive samples. The ESR study indicates the absence of free charge carriers and no sign of paramagnetic defects are found. $^{31}$P NMR shows the presence of a characteristic Pake doublet structure due to the interaction between $I = 1/2$ nuclei. Microwave co"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1805.01495","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":"2026-05-18T00:16:51Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"f0LebKtXyEzoog4jJa3kGzS+wh18ICO2E+5OFAbFBFXxdZoq6AYuH+wsAEzzfpbwbcR8j8eYLKCyMRkIKPBDDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T06:49:24.590981Z"},"content_sha256":"1a086a83c287e08a98e54066f09c6de6f5ec94a243e0f85807a62cb739fa1856","schema_version":"1.0","event_id":"sha256:1a086a83c287e08a98e54066f09c6de6f5ec94a243e0f85807a62cb739fa1856"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/OCK6Z56O3D5ZWDMK4CVE2DWXJR/bundle.json","state_url":"https://pith.science/pith/OCK6Z56O3D5ZWDMK4CVE2DWXJR/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/OCK6Z56O3D5ZWDMK4CVE2DWXJR/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":"2026-05-31T06:49:24Z","links":{"resolver":"https://pith.science/pith/OCK6Z56O3D5ZWDMK4CVE2DWXJR","bundle":"https://pith.science/pith/OCK6Z56O3D5ZWDMK4CVE2DWXJR/bundle.json","state":"https://pith.science/pith/OCK6Z56O3D5ZWDMK4CVE2DWXJR/state.json","well_known_bundle":"https://pith.science/.well-known/pith/OCK6Z56O3D5ZWDMK4CVE2DWXJR/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:OCK6Z56O3D5ZWDMK4CVE2DWXJR","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":"a52a05af24fd157672c8ed3f1cc89919b051244f066ab79bebb12c117b6e87f4","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2018-05-03T18:22:55Z","title_canon_sha256":"f7dca77b430515675f8a4906e5525dc35e607d9948f2caea1055832b4eb3d83b"},"schema_version":"1.0","source":{"id":"1805.01495","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1805.01495","created_at":"2026-05-18T00:16:51Z"},{"alias_kind":"arxiv_version","alias_value":"1805.01495v1","created_at":"2026-05-18T00:16:51Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1805.01495","created_at":"2026-05-18T00:16:51Z"},{"alias_kind":"pith_short_12","alias_value":"OCK6Z56O3D5Z","created_at":"2026-05-18T12:32:43Z"},{"alias_kind":"pith_short_16","alias_value":"OCK6Z56O3D5ZWDMK","created_at":"2026-05-18T12:32:43Z"},{"alias_kind":"pith_short_8","alias_value":"OCK6Z56O","created_at":"2026-05-18T12:32:43Z"}],"graph_snapshots":[{"event_id":"sha256:1a086a83c287e08a98e54066f09c6de6f5ec94a243e0f85807a62cb739fa1856","target":"graph","created_at":"2026-05-18T00:16:51Z","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":"Black phosphorus has emerged as the next member in the graphene inspired two-dimensional materials family. Its electronic and magnetic properties are studied herein using electron and nuclear magnetic resonance techniques (ESR and NMR) and microwave conductivity measurement. The latter is a unique technique to study conductivity on air sensitive samples. The ESR study indicates the absence of free charge carriers and no sign of paramagnetic defects are found. $^{31}$P NMR shows the presence of a characteristic Pake doublet structure due to the interaction between $I = 1/2$ nuclei. Microwave co","authors_text":"Andreas Hirsch, Bence G. M\\'arkus, Ferenc Simon, Frank Hauke, Gonzalo Abell\\'an, Julio C. Chac\\'on-Torres, K\\'aroly Nagy, Stefan Wild, Titusz Feh\\'er","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2018-05-03T18:22:55Z","title":"Electronic and magnetic properties of black phosphorus"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1805.01495","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:b62b253a80065529542b30fc1628e6e2aa79b7dc357a377b3724dfb8fe0e51a7","target":"record","created_at":"2026-05-18T00:16:51Z","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":"a52a05af24fd157672c8ed3f1cc89919b051244f066ab79bebb12c117b6e87f4","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2018-05-03T18:22:55Z","title_canon_sha256":"f7dca77b430515675f8a4906e5525dc35e607d9948f2caea1055832b4eb3d83b"},"schema_version":"1.0","source":{"id":"1805.01495","kind":"arxiv","version":1}},"canonical_sha256":"7095ecf7ced8fb9b0d8ae0aa4d0ed74c42380ac21febf4065588044708187d53","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"7095ecf7ced8fb9b0d8ae0aa4d0ed74c42380ac21febf4065588044708187d53","first_computed_at":"2026-05-18T00:16:51.203145Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:16:51.203145Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"VnKl4JPQZhBC4MRJVvkBwH3BJixmwmoYkETA2azeQfpzsuk2Drxq7KssyD92rMZQU7v/dV4tE6F6u8dfBPEZDQ==","signature_status":"signed_v1","signed_at":"2026-05-18T00:16:51.203873Z","signed_message":"canonical_sha256_bytes"},"source_id":"1805.01495","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:b62b253a80065529542b30fc1628e6e2aa79b7dc357a377b3724dfb8fe0e51a7","sha256:1a086a83c287e08a98e54066f09c6de6f5ec94a243e0f85807a62cb739fa1856"],"state_sha256":"db502e3d99452b8076e63f2c1cf1a93b80dbcd5faff2c342b8c453248519cd7a"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"BSoFIOdPEd2AmpMPV+0s1Q996pKiyBDfqDeusMiXP4zpJ5bNcPsyXO3hKHeRpPKTIPBABtIz5U3Wv0PqGf2MAg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-31T06:49:24.594331Z","bundle_sha256":"40235c50f26ab69169ac35bac26e27fd62e01cfe3635b241adda06299524fa06"}}