{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2012:IZNU4G7WCUAZ3ZIB4MIFMO5A7N","short_pith_number":"pith:IZNU4G7W","canonical_record":{"source":{"id":"1211.2845","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2012-11-12T22:10:32Z","cross_cats_sorted":["cond-mat.mtrl-sci"],"title_canon_sha256":"fb30e6227183f2f97369541ed5a1df83972f96f511058b3b7f43019d0d3180a4","abstract_canon_sha256":"fe101fe7540da1d6d1a262d3aaf68878e5998df6a18bb41501e977bd2cee4a70"},"schema_version":"1.0"},"canonical_sha256":"465b4e1bf615019de501e310563ba0fb6f8d4c38f556d5fa1f40ba8546f82f0d","source":{"kind":"arxiv","id":"1211.2845","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1211.2845","created_at":"2026-05-18T03:35:27Z"},{"alias_kind":"arxiv_version","alias_value":"1211.2845v2","created_at":"2026-05-18T03:35:27Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1211.2845","created_at":"2026-05-18T03:35:27Z"},{"alias_kind":"pith_short_12","alias_value":"IZNU4G7WCUAZ","created_at":"2026-05-18T12:27:09Z"},{"alias_kind":"pith_short_16","alias_value":"IZNU4G7WCUAZ3ZIB","created_at":"2026-05-18T12:27:09Z"},{"alias_kind":"pith_short_8","alias_value":"IZNU4G7W","created_at":"2026-05-18T12:27:09Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2012:IZNU4G7WCUAZ3ZIB4MIFMO5A7N","target":"record","payload":{"canonical_record":{"source":{"id":"1211.2845","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2012-11-12T22:10:32Z","cross_cats_sorted":["cond-mat.mtrl-sci"],"title_canon_sha256":"fb30e6227183f2f97369541ed5a1df83972f96f511058b3b7f43019d0d3180a4","abstract_canon_sha256":"fe101fe7540da1d6d1a262d3aaf68878e5998df6a18bb41501e977bd2cee4a70"},"schema_version":"1.0"},"canonical_sha256":"465b4e1bf615019de501e310563ba0fb6f8d4c38f556d5fa1f40ba8546f82f0d","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:35:27.804987Z","signature_b64":"u9Gz/5rzN1s1fePFfaDGvN14i1aOO0wwDhyN+lrnYwiJzskjngtpk+BjcvH/UZDzt5LYiYE2lGfUM6LM87nkBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"465b4e1bf615019de501e310563ba0fb6f8d4c38f556d5fa1f40ba8546f82f0d","last_reissued_at":"2026-05-18T03:35:27.804245Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:35:27.804245Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1211.2845","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":"2026-05-18T03:35:27Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"+RYPq01FRWhVOledN6I9hi4sim5nw+OqDU4EA7/sC75pvNUvy11vyrSHPqqp/6IsiOffBPg2QQ00hM4f8vjzCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T17:04:32.015140Z"},"content_sha256":"114741f766f4efd1e7a44fb81b0b9d3be796344ee72dce82e5eb196fc4d6aa8c","schema_version":"1.0","event_id":"sha256:114741f766f4efd1e7a44fb81b0b9d3be796344ee72dce82e5eb196fc4d6aa8c"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2012:IZNU4G7WCUAZ3ZIB4MIFMO5A7N","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Density dependent electrical conductivity in suspended graphene: Approaching the Dirac point in transport","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.mtrl-sci"],"primary_cat":"cond-mat.mes-hall","authors_text":"E. H. Hwang, S. Das Sarma","submitted_at":"2012-11-12T22:10:32Z","abstract_excerpt":"We theoretically consider, comparing with the existing experimental literature, the electrical conductivity of gated monolayer graphene as a function of carrier density, temperature, and disorder in order to assess the prospects of accessing the Dirac point using transport studies in high-quality suspended graphene. We show that the temperature dependence of graphene conductivity around the charge neutrality point provides information about how close the system can approach the Dirac point although competition between long-range and short-range disorder as well as between diffusive and ballist"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1211.2845","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":""},"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":"2026-05-18T03:35:27Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"/VMSsYP2Okrcl2Xg8L1btxvRqDMBEhRY3Rn2jUCOSPD41uO5sE4dYCb6YgINPWEAZcPxrnsednjMim5M/NsqCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T17:04:32.015498Z"},"content_sha256":"f88f36d10b5df38f11d1b86c6d18ec5918293083c30e770b1065a0e8c538f94d","schema_version":"1.0","event_id":"sha256:f88f36d10b5df38f11d1b86c6d18ec5918293083c30e770b1065a0e8c538f94d"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/IZNU4G7WCUAZ3ZIB4MIFMO5A7N/bundle.json","state_url":"https://pith.science/pith/IZNU4G7WCUAZ3ZIB4MIFMO5A7N/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/IZNU4G7WCUAZ3ZIB4MIFMO5A7N/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":"2026-05-28T17:04:32Z","links":{"resolver":"https://pith.science/pith/IZNU4G7WCUAZ3ZIB4MIFMO5A7N","bundle":"https://pith.science/pith/IZNU4G7WCUAZ3ZIB4MIFMO5A7N/bundle.json","state":"https://pith.science/pith/IZNU4G7WCUAZ3ZIB4MIFMO5A7N/state.json","well_known_bundle":"https://pith.science/.well-known/pith/IZNU4G7WCUAZ3ZIB4MIFMO5A7N/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:IZNU4G7WCUAZ3ZIB4MIFMO5A7N","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":"fe101fe7540da1d6d1a262d3aaf68878e5998df6a18bb41501e977bd2cee4a70","cross_cats_sorted":["cond-mat.mtrl-sci"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2012-11-12T22:10:32Z","title_canon_sha256":"fb30e6227183f2f97369541ed5a1df83972f96f511058b3b7f43019d0d3180a4"},"schema_version":"1.0","source":{"id":"1211.2845","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1211.2845","created_at":"2026-05-18T03:35:27Z"},{"alias_kind":"arxiv_version","alias_value":"1211.2845v2","created_at":"2026-05-18T03:35:27Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1211.2845","created_at":"2026-05-18T03:35:27Z"},{"alias_kind":"pith_short_12","alias_value":"IZNU4G7WCUAZ","created_at":"2026-05-18T12:27:09Z"},{"alias_kind":"pith_short_16","alias_value":"IZNU4G7WCUAZ3ZIB","created_at":"2026-05-18T12:27:09Z"},{"alias_kind":"pith_short_8","alias_value":"IZNU4G7W","created_at":"2026-05-18T12:27:09Z"}],"graph_snapshots":[{"event_id":"sha256:f88f36d10b5df38f11d1b86c6d18ec5918293083c30e770b1065a0e8c538f94d","target":"graph","created_at":"2026-05-18T03:35:27Z","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 theoretically consider, comparing with the existing experimental literature, the electrical conductivity of gated monolayer graphene as a function of carrier density, temperature, and disorder in order to assess the prospects of accessing the Dirac point using transport studies in high-quality suspended graphene. We show that the temperature dependence of graphene conductivity around the charge neutrality point provides information about how close the system can approach the Dirac point although competition between long-range and short-range disorder as well as between diffusive and ballist","authors_text":"E. H. Hwang, S. Das Sarma","cross_cats":["cond-mat.mtrl-sci"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2012-11-12T22:10:32Z","title":"Density dependent electrical conductivity in suspended graphene: Approaching the Dirac point in transport"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1211.2845","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":"sha256:114741f766f4efd1e7a44fb81b0b9d3be796344ee72dce82e5eb196fc4d6aa8c","target":"record","created_at":"2026-05-18T03:35:27Z","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":"fe101fe7540da1d6d1a262d3aaf68878e5998df6a18bb41501e977bd2cee4a70","cross_cats_sorted":["cond-mat.mtrl-sci"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2012-11-12T22:10:32Z","title_canon_sha256":"fb30e6227183f2f97369541ed5a1df83972f96f511058b3b7f43019d0d3180a4"},"schema_version":"1.0","source":{"id":"1211.2845","kind":"arxiv","version":2}},"canonical_sha256":"465b4e1bf615019de501e310563ba0fb6f8d4c38f556d5fa1f40ba8546f82f0d","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"465b4e1bf615019de501e310563ba0fb6f8d4c38f556d5fa1f40ba8546f82f0d","first_computed_at":"2026-05-18T03:35:27.804245Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:35:27.804245Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"u9Gz/5rzN1s1fePFfaDGvN14i1aOO0wwDhyN+lrnYwiJzskjngtpk+BjcvH/UZDzt5LYiYE2lGfUM6LM87nkBQ==","signature_status":"signed_v1","signed_at":"2026-05-18T03:35:27.804987Z","signed_message":"canonical_sha256_bytes"},"source_id":"1211.2845","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:114741f766f4efd1e7a44fb81b0b9d3be796344ee72dce82e5eb196fc4d6aa8c","sha256:f88f36d10b5df38f11d1b86c6d18ec5918293083c30e770b1065a0e8c538f94d"],"state_sha256":"40904d3ffc5569736567b3c232bbcf8d25063b3998c44001ed9fae34d70413a0"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"/ea1e9wKtHkJs4YmUimdvhgxEiTGq04hp2895i3skrfQFMhi7FtOV6UmIn4XDImbbJrrMWNv6xOAHHnKLqJpDQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-28T17:04:32.017973Z","bundle_sha256":"293fa3f4e5dcea6a07a565e9cedf1ca5e10aafba93aa88ea7afcea09865a0e56"}}