{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:UCDPIPIS26JVFSCTB6JRX7XTRT","short_pith_number":"pith:UCDPIPIS","canonical_record":{"source":{"id":"1505.03747","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2015-05-14T15:00:19Z","cross_cats_sorted":[],"title_canon_sha256":"845356fbd0ad96ab42b9c16131b6a971a59656ce72112793d96009617e24c3db","abstract_canon_sha256":"5573c5854419d3f531e968e7d0f767b14eb016a4f4409fc51ca34def21b737ec"},"schema_version":"1.0"},"canonical_sha256":"a086f43d12d79352c8530f931bfef38cd17bae1e83e9f44c8d8a5699ff0b785e","source":{"kind":"arxiv","id":"1505.03747","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1505.03747","created_at":"2026-05-18T01:35:43Z"},{"alias_kind":"arxiv_version","alias_value":"1505.03747v1","created_at":"2026-05-18T01:35:43Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1505.03747","created_at":"2026-05-18T01:35:43Z"},{"alias_kind":"pith_short_12","alias_value":"UCDPIPIS26JV","created_at":"2026-05-18T12:29:44Z"},{"alias_kind":"pith_short_16","alias_value":"UCDPIPIS26JVFSCT","created_at":"2026-05-18T12:29:44Z"},{"alias_kind":"pith_short_8","alias_value":"UCDPIPIS","created_at":"2026-05-18T12:29:44Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:UCDPIPIS26JVFSCTB6JRX7XTRT","target":"record","payload":{"canonical_record":{"source":{"id":"1505.03747","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2015-05-14T15:00:19Z","cross_cats_sorted":[],"title_canon_sha256":"845356fbd0ad96ab42b9c16131b6a971a59656ce72112793d96009617e24c3db","abstract_canon_sha256":"5573c5854419d3f531e968e7d0f767b14eb016a4f4409fc51ca34def21b737ec"},"schema_version":"1.0"},"canonical_sha256":"a086f43d12d79352c8530f931bfef38cd17bae1e83e9f44c8d8a5699ff0b785e","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:35:43.338006Z","signature_b64":"Bqk8zCWzW6iK5w0/MgnDxbOcyYv/81DZsBGEF+Yw+DoDJz5wX+MumfQpVbCqxnGK4znQ16hfO9bciIETzCc8Cg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"a086f43d12d79352c8530f931bfef38cd17bae1e83e9f44c8d8a5699ff0b785e","last_reissued_at":"2026-05-18T01:35:43.337526Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:35:43.337526Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1505.03747","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":"2026-05-18T01:35:43Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"rhgA9wRN7Yx7mkx93TQV2wvKFyF1zOWtHP+jTkWGsFUq1Hs9s6rzp9fXRKj37h9dPCbp7A55NyJrBl8wkqocAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-21T11:07:43.097653Z"},"content_sha256":"de3404c56949edcf068e041c4df1d3d7f7e8696954e559ee8343d187af9b6d1c","schema_version":"1.0","event_id":"sha256:de3404c56949edcf068e041c4df1d3d7f7e8696954e559ee8343d187af9b6d1c"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:UCDPIPIS26JVFSCTB6JRX7XTRT","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Disorder induced Dirac-point physics in epitaxial graphene from temperature-dependent magneto-transport measurements","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mes-hall","authors_text":"A. M. R. Baker, A. Tzalenchuk, J. A. Alexander-Webber, J. Huang, R. J. Nicholas, R. Yakimova, S. Kubatkin, S. Lara-Avila, T. J. B. M. Janssen, T. Yager, V. Antonov","submitted_at":"2015-05-14T15:00:19Z","abstract_excerpt":"We report a study of disorder effects on epitaxial graphene in the vicinity of the Dirac point by magneto-transport. Hall effect measurements show that the carrier density increases quadratically with temperature, in good agreement with theoretical predictions which take into account intrinsic thermal excitation combined with electron-hole puddles induced by charged impurities. We deduce disorder strengths in the range 10.2 $\\sim$ 31.2 meV, depending on the sample treatment. We investigate the scattering mechanisms and estimate the impurity density to be $3.0 \\sim 9.1 \\times 10^{10}$ cm$^{-2}$"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1505.03747","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":"2026-05-18T01:35:43Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"d0DryswrtBW/KkZivUr/MENLVGAqYaDYi5zXWFk/J+rJzFsrrUT2F7RHvUi7nrHpRhmYY4oGWKY3c7QwXyuiDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-21T11:07:43.098004Z"},"content_sha256":"71cd8b992b5a2db053a060933757b65c3fc5a9f89d5b035b30d168fc5291d331","schema_version":"1.0","event_id":"sha256:71cd8b992b5a2db053a060933757b65c3fc5a9f89d5b035b30d168fc5291d331"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/UCDPIPIS26JVFSCTB6JRX7XTRT/bundle.json","state_url":"https://pith.science/pith/UCDPIPIS26JVFSCTB6JRX7XTRT/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/UCDPIPIS26JVFSCTB6JRX7XTRT/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":"2026-05-21T11:07:43Z","links":{"resolver":"https://pith.science/pith/UCDPIPIS26JVFSCTB6JRX7XTRT","bundle":"https://pith.science/pith/UCDPIPIS26JVFSCTB6JRX7XTRT/bundle.json","state":"https://pith.science/pith/UCDPIPIS26JVFSCTB6JRX7XTRT/state.json","well_known_bundle":"https://pith.science/.well-known/pith/UCDPIPIS26JVFSCTB6JRX7XTRT/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:UCDPIPIS26JVFSCTB6JRX7XTRT","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":"5573c5854419d3f531e968e7d0f767b14eb016a4f4409fc51ca34def21b737ec","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2015-05-14T15:00:19Z","title_canon_sha256":"845356fbd0ad96ab42b9c16131b6a971a59656ce72112793d96009617e24c3db"},"schema_version":"1.0","source":{"id":"1505.03747","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1505.03747","created_at":"2026-05-18T01:35:43Z"},{"alias_kind":"arxiv_version","alias_value":"1505.03747v1","created_at":"2026-05-18T01:35:43Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1505.03747","created_at":"2026-05-18T01:35:43Z"},{"alias_kind":"pith_short_12","alias_value":"UCDPIPIS26JV","created_at":"2026-05-18T12:29:44Z"},{"alias_kind":"pith_short_16","alias_value":"UCDPIPIS26JVFSCT","created_at":"2026-05-18T12:29:44Z"},{"alias_kind":"pith_short_8","alias_value":"UCDPIPIS","created_at":"2026-05-18T12:29:44Z"}],"graph_snapshots":[{"event_id":"sha256:71cd8b992b5a2db053a060933757b65c3fc5a9f89d5b035b30d168fc5291d331","target":"graph","created_at":"2026-05-18T01:35:43Z","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":"We report a study of disorder effects on epitaxial graphene in the vicinity of the Dirac point by magneto-transport. Hall effect measurements show that the carrier density increases quadratically with temperature, in good agreement with theoretical predictions which take into account intrinsic thermal excitation combined with electron-hole puddles induced by charged impurities. We deduce disorder strengths in the range 10.2 $\\sim$ 31.2 meV, depending on the sample treatment. We investigate the scattering mechanisms and estimate the impurity density to be $3.0 \\sim 9.1 \\times 10^{10}$ cm$^{-2}$","authors_text":"A. M. R. Baker, A. Tzalenchuk, J. A. Alexander-Webber, J. Huang, R. J. Nicholas, R. Yakimova, S. Kubatkin, S. Lara-Avila, T. J. B. M. Janssen, T. Yager, V. Antonov","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2015-05-14T15:00:19Z","title":"Disorder induced Dirac-point physics in epitaxial graphene from temperature-dependent magneto-transport measurements"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1505.03747","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:de3404c56949edcf068e041c4df1d3d7f7e8696954e559ee8343d187af9b6d1c","target":"record","created_at":"2026-05-18T01:35:43Z","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":"5573c5854419d3f531e968e7d0f767b14eb016a4f4409fc51ca34def21b737ec","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2015-05-14T15:00:19Z","title_canon_sha256":"845356fbd0ad96ab42b9c16131b6a971a59656ce72112793d96009617e24c3db"},"schema_version":"1.0","source":{"id":"1505.03747","kind":"arxiv","version":1}},"canonical_sha256":"a086f43d12d79352c8530f931bfef38cd17bae1e83e9f44c8d8a5699ff0b785e","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"a086f43d12d79352c8530f931bfef38cd17bae1e83e9f44c8d8a5699ff0b785e","first_computed_at":"2026-05-18T01:35:43.337526Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:35:43.337526Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Bqk8zCWzW6iK5w0/MgnDxbOcyYv/81DZsBGEF+Yw+DoDJz5wX+MumfQpVbCqxnGK4znQ16hfO9bciIETzCc8Cg==","signature_status":"signed_v1","signed_at":"2026-05-18T01:35:43.338006Z","signed_message":"canonical_sha256_bytes"},"source_id":"1505.03747","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:de3404c56949edcf068e041c4df1d3d7f7e8696954e559ee8343d187af9b6d1c","sha256:71cd8b992b5a2db053a060933757b65c3fc5a9f89d5b035b30d168fc5291d331"],"state_sha256":"43b3d6a4de15ee51905e5c89894f0e9d57f0effe797f346c5a9a3510d65acaf7"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"iSgnPrTxCjA/UA33ek9Mm/p26A4V8J7HbHvRH+ZBnb0Cs8niJn75l4hSjiPD5tOuYQGy2k8ONfGOygojeasqBg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-21T11:07:43.100392Z","bundle_sha256":"2cf8c71d571e6b41dad1e20c7f7a7034028a467f9f570d521e7c7fa5d04c2dfd"}}