{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2016:WRFJELSYBPEYJ645BMEWVCRTYT","short_pith_number":"pith:WRFJELSY","canonical_record":{"source":{"id":"1606.07720","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2016-06-24T15:16:11Z","cross_cats_sorted":["cond-mat.mes-hall"],"title_canon_sha256":"ea7ec4b62564d385c45643c1074de2f9b8d7496cba56c2ea8c3143716c99396b","abstract_canon_sha256":"67255c8e4c09a11ef881cd34c38b9acee15866986b96239a771a20ebc0e8d9e4"},"schema_version":"1.0"},"canonical_sha256":"b44a922e580bc984fb9d0b096a8a33c4ce5c60ec682d74dc842bb2145044b755","source":{"kind":"arxiv","id":"1606.07720","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1606.07720","created_at":"2026-05-18T01:11:55Z"},{"alias_kind":"arxiv_version","alias_value":"1606.07720v1","created_at":"2026-05-18T01:11:55Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1606.07720","created_at":"2026-05-18T01:11:55Z"},{"alias_kind":"pith_short_12","alias_value":"WRFJELSYBPEY","created_at":"2026-05-18T12:30:51Z"},{"alias_kind":"pith_short_16","alias_value":"WRFJELSYBPEYJ645","created_at":"2026-05-18T12:30:51Z"},{"alias_kind":"pith_short_8","alias_value":"WRFJELSY","created_at":"2026-05-18T12:30:51Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2016:WRFJELSYBPEYJ645BMEWVCRTYT","target":"record","payload":{"canonical_record":{"source":{"id":"1606.07720","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2016-06-24T15:16:11Z","cross_cats_sorted":["cond-mat.mes-hall"],"title_canon_sha256":"ea7ec4b62564d385c45643c1074de2f9b8d7496cba56c2ea8c3143716c99396b","abstract_canon_sha256":"67255c8e4c09a11ef881cd34c38b9acee15866986b96239a771a20ebc0e8d9e4"},"schema_version":"1.0"},"canonical_sha256":"b44a922e580bc984fb9d0b096a8a33c4ce5c60ec682d74dc842bb2145044b755","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:11:55.840366Z","signature_b64":"eClCxC3x5Vb+gY1Nte9pwIhXGbIjhsbfvdMiFbHcbLVdbdyfKBhxtQI5eCdciX5yC4H3xHECD7otbWwtrHEdAA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"b44a922e580bc984fb9d0b096a8a33c4ce5c60ec682d74dc842bb2145044b755","last_reissued_at":"2026-05-18T01:11:55.840023Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:11:55.840023Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1606.07720","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":"2026-05-18T01:11:55Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"f3mN79t2S0zKrxHvFpfNqNsyN5+CYbZjQ7BPf4xa6EUbNGrlh/fj0XevD8GNaUZEN2MIgiiRKFkikOieB0R8DQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T20:49:40.986696Z"},"content_sha256":"3ff526c78a962049d630ddf29f3dbf2598c88e2bf598817faa1938183197c9ae","schema_version":"1.0","event_id":"sha256:3ff526c78a962049d630ddf29f3dbf2598c88e2bf598817faa1938183197c9ae"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2016:WRFJELSYBPEYJ645BMEWVCRTYT","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Epitaxial graphene homogeneity and quantum Hall effect in millimeter-scale devices","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.mes-hall"],"primary_cat":"cond-mat.mtrl-sci","authors_text":"Angela R. Hight Walker, Chiashain Chuang, Chieh-I Liu, Chieh-Wen Liu, George R. Jones, Guangjun Cheng, Irene G. Calizo, Patrick Mende, Randall M. Feenstra, Randolph E. Elmquist, Yanfei Yang","submitted_at":"2016-06-24T15:16:11Z","abstract_excerpt":"Quantized magnetotransport is observed in 5.6 x 5.6 mm^2 epitaxial graphene devices, grown using highly constrained sublimation on the Si-face of SiC(0001) at high temperature (1900 {\\deg}C). The precise quantized Hall resistance of Rxy = h/2e^2 is maintained up to record level of critical current Ixx = 0.72 mA at T = 3.1 K and 9 T in a device where Raman microscopy reveals low and homogeneous strain. Adsorption-induced molecular doping in a second device reduced the carrier concentration close to the Dirac point(n ~ 1E10 (1/cm^2)), where mobility of 43700 cm^2/Vs is measured over an area of 1"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1606.07720","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":"2026-05-18T01:11:55Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"LJQzylvisVMXlfsZcrC60koExB7Ax9iMzzMUpRqauD37j3NYR00pgon6eZyNAI+ZpJo+W0EUJXdcwFoT81/MAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T20:49:40.987176Z"},"content_sha256":"4e0ebcc5e222553d9bfdced1609a4aa85fb2e5f0f42d9490df616e24e03fc3f8","schema_version":"1.0","event_id":"sha256:4e0ebcc5e222553d9bfdced1609a4aa85fb2e5f0f42d9490df616e24e03fc3f8"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/WRFJELSYBPEYJ645BMEWVCRTYT/bundle.json","state_url":"https://pith.science/pith/WRFJELSYBPEYJ645BMEWVCRTYT/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/WRFJELSYBPEYJ645BMEWVCRTYT/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":"2026-05-27T20:49:40Z","links":{"resolver":"https://pith.science/pith/WRFJELSYBPEYJ645BMEWVCRTYT","bundle":"https://pith.science/pith/WRFJELSYBPEYJ645BMEWVCRTYT/bundle.json","state":"https://pith.science/pith/WRFJELSYBPEYJ645BMEWVCRTYT/state.json","well_known_bundle":"https://pith.science/.well-known/pith/WRFJELSYBPEYJ645BMEWVCRTYT/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:WRFJELSYBPEYJ645BMEWVCRTYT","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":"67255c8e4c09a11ef881cd34c38b9acee15866986b96239a771a20ebc0e8d9e4","cross_cats_sorted":["cond-mat.mes-hall"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2016-06-24T15:16:11Z","title_canon_sha256":"ea7ec4b62564d385c45643c1074de2f9b8d7496cba56c2ea8c3143716c99396b"},"schema_version":"1.0","source":{"id":"1606.07720","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1606.07720","created_at":"2026-05-18T01:11:55Z"},{"alias_kind":"arxiv_version","alias_value":"1606.07720v1","created_at":"2026-05-18T01:11:55Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1606.07720","created_at":"2026-05-18T01:11:55Z"},{"alias_kind":"pith_short_12","alias_value":"WRFJELSYBPEY","created_at":"2026-05-18T12:30:51Z"},{"alias_kind":"pith_short_16","alias_value":"WRFJELSYBPEYJ645","created_at":"2026-05-18T12:30:51Z"},{"alias_kind":"pith_short_8","alias_value":"WRFJELSY","created_at":"2026-05-18T12:30:51Z"}],"graph_snapshots":[{"event_id":"sha256:4e0ebcc5e222553d9bfdced1609a4aa85fb2e5f0f42d9490df616e24e03fc3f8","target":"graph","created_at":"2026-05-18T01:11:55Z","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":"Quantized magnetotransport is observed in 5.6 x 5.6 mm^2 epitaxial graphene devices, grown using highly constrained sublimation on the Si-face of SiC(0001) at high temperature (1900 {\\deg}C). The precise quantized Hall resistance of Rxy = h/2e^2 is maintained up to record level of critical current Ixx = 0.72 mA at T = 3.1 K and 9 T in a device where Raman microscopy reveals low and homogeneous strain. Adsorption-induced molecular doping in a second device reduced the carrier concentration close to the Dirac point(n ~ 1E10 (1/cm^2)), where mobility of 43700 cm^2/Vs is measured over an area of 1","authors_text":"Angela R. Hight Walker, Chiashain Chuang, Chieh-I Liu, Chieh-Wen Liu, George R. Jones, Guangjun Cheng, Irene G. Calizo, Patrick Mende, Randall M. Feenstra, Randolph E. Elmquist, Yanfei Yang","cross_cats":["cond-mat.mes-hall"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2016-06-24T15:16:11Z","title":"Epitaxial graphene homogeneity and quantum Hall effect in millimeter-scale devices"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1606.07720","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":"sha256:3ff526c78a962049d630ddf29f3dbf2598c88e2bf598817faa1938183197c9ae","target":"record","created_at":"2026-05-18T01:11:55Z","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":"67255c8e4c09a11ef881cd34c38b9acee15866986b96239a771a20ebc0e8d9e4","cross_cats_sorted":["cond-mat.mes-hall"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2016-06-24T15:16:11Z","title_canon_sha256":"ea7ec4b62564d385c45643c1074de2f9b8d7496cba56c2ea8c3143716c99396b"},"schema_version":"1.0","source":{"id":"1606.07720","kind":"arxiv","version":1}},"canonical_sha256":"b44a922e580bc984fb9d0b096a8a33c4ce5c60ec682d74dc842bb2145044b755","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"b44a922e580bc984fb9d0b096a8a33c4ce5c60ec682d74dc842bb2145044b755","first_computed_at":"2026-05-18T01:11:55.840023Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:11:55.840023Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"eClCxC3x5Vb+gY1Nte9pwIhXGbIjhsbfvdMiFbHcbLVdbdyfKBhxtQI5eCdciX5yC4H3xHECD7otbWwtrHEdAA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:11:55.840366Z","signed_message":"canonical_sha256_bytes"},"source_id":"1606.07720","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:3ff526c78a962049d630ddf29f3dbf2598c88e2bf598817faa1938183197c9ae","sha256:4e0ebcc5e222553d9bfdced1609a4aa85fb2e5f0f42d9490df616e24e03fc3f8"],"state_sha256":"a2449da840705956a4e37973d3b634ece63850d2d4249981a1d45e51e0541055"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"CBDQhLqJDv7Fs3MwciNC/nd2g//ebSLplBHQxKk7f7UCI6CZQPVD7pUPBXVwPQpkBpO6PWKsziXAIxJjswREBw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-27T20:49:40.989673Z","bundle_sha256":"ca2d38425df26abc3e35abbc91d5202e74b026f081350d89c03c33a78da3f2fb"}}