{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2013:MW4TRPMDHD2GDLFAEZR6BK6U5N","short_pith_number":"pith:MW4TRPMD","canonical_record":{"source":{"id":"1302.5431","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2013-02-21T21:03:33Z","cross_cats_sorted":["cond-mat.mes-hall"],"title_canon_sha256":"d8e3ff988f915bb9b3935e552a4e0588ee1bae6cb213b86c1b7bc71e57fa7b58","abstract_canon_sha256":"7c08baecb98cbe5b7ea2eceff56a8e3242473e03df0f6876e962c9c15ec9dd0b"},"schema_version":"1.0"},"canonical_sha256":"65b938bd8338f461aca02663e0abd4eb60fc1c652d3ade7aec6b3ed1c1af9a6d","source":{"kind":"arxiv","id":"1302.5431","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1302.5431","created_at":"2026-05-18T02:39:46Z"},{"alias_kind":"arxiv_version","alias_value":"1302.5431v1","created_at":"2026-05-18T02:39:46Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1302.5431","created_at":"2026-05-18T02:39:46Z"},{"alias_kind":"pith_short_12","alias_value":"MW4TRPMDHD2G","created_at":"2026-05-18T12:27:52Z"},{"alias_kind":"pith_short_16","alias_value":"MW4TRPMDHD2GDLFA","created_at":"2026-05-18T12:27:52Z"},{"alias_kind":"pith_short_8","alias_value":"MW4TRPMD","created_at":"2026-05-18T12:27:52Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2013:MW4TRPMDHD2GDLFAEZR6BK6U5N","target":"record","payload":{"canonical_record":{"source":{"id":"1302.5431","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2013-02-21T21:03:33Z","cross_cats_sorted":["cond-mat.mes-hall"],"title_canon_sha256":"d8e3ff988f915bb9b3935e552a4e0588ee1bae6cb213b86c1b7bc71e57fa7b58","abstract_canon_sha256":"7c08baecb98cbe5b7ea2eceff56a8e3242473e03df0f6876e962c9c15ec9dd0b"},"schema_version":"1.0"},"canonical_sha256":"65b938bd8338f461aca02663e0abd4eb60fc1c652d3ade7aec6b3ed1c1af9a6d","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:39:46.012897Z","signature_b64":"pZY5+SAnI5vPed+uGDTfND0NrSC2ulNLAhcClF5GVfnIlpnCQvC8IBrC+E4twJIxGa25bLZ6M9H8qqLDK28NBA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"65b938bd8338f461aca02663e0abd4eb60fc1c652d3ade7aec6b3ed1c1af9a6d","last_reissued_at":"2026-05-18T02:39:46.012365Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:39:46.012365Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1302.5431","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":"2026-05-18T02:39:46Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Hi0LlG6EHpX1Uhv9Q04fKQJBi/OpVNLIODJhFiYOSefXMZGf1iZKtRrDNBDLvnZ1Dx7AN+n5uyusivdfBlAVCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T19:58:00.976183Z"},"content_sha256":"265f3d1961c38df78ef13d4460f5098899469b2df795633398d9c662abb04d20","schema_version":"1.0","event_id":"sha256:265f3d1961c38df78ef13d4460f5098899469b2df795633398d9c662abb04d20"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2013:MW4TRPMDHD2GDLFAEZR6BK6U5N","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Direct observation of the Mott gap in strontium iridate with a scanning tunneling microscope","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.mes-hall"],"primary_cat":"cond-mat.str-el","authors_text":"Gang Cao, John Nichols, Kwok-Wai Ng, Noah Bray-Ali","submitted_at":"2013-02-21T21:03:33Z","abstract_excerpt":"The single-layer Mott insulator strontium iridate Sr$_2$IrO$_4$ was studied using a scanning tunneling microscope. This measurement technique is unique due to the transport properties of this Mott insulator allowing tunneling measurements to be performed, even at cryogenic temperatures. We obtained high-resolution images of the sample surface and the differential tunneling conductance at different cryogenic temperatures. The differential conductance is a direct measurement of the local electronic density of states which provided an insulating gap consistent with optical conductivity, angle res"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1302.5431","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":"2026-05-18T02:39:46Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"J0bGvJN1R9IclwIHlc8bvI6shOTkTNZ/z7wVs2aoUyIRZ4J/0Rd5ObcqkGLtbehx9u5PoodTkbMaXWR1RbvpDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T19:58:00.976573Z"},"content_sha256":"0850d7436fe7946ab86e0420c40e85c4475d25063ed75684434d6f4d0596e605","schema_version":"1.0","event_id":"sha256:0850d7436fe7946ab86e0420c40e85c4475d25063ed75684434d6f4d0596e605"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/MW4TRPMDHD2GDLFAEZR6BK6U5N/bundle.json","state_url":"https://pith.science/pith/MW4TRPMDHD2GDLFAEZR6BK6U5N/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/MW4TRPMDHD2GDLFAEZR6BK6U5N/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":"2026-06-02T19:58:00Z","links":{"resolver":"https://pith.science/pith/MW4TRPMDHD2GDLFAEZR6BK6U5N","bundle":"https://pith.science/pith/MW4TRPMDHD2GDLFAEZR6BK6U5N/bundle.json","state":"https://pith.science/pith/MW4TRPMDHD2GDLFAEZR6BK6U5N/state.json","well_known_bundle":"https://pith.science/.well-known/pith/MW4TRPMDHD2GDLFAEZR6BK6U5N/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:MW4TRPMDHD2GDLFAEZR6BK6U5N","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":"7c08baecb98cbe5b7ea2eceff56a8e3242473e03df0f6876e962c9c15ec9dd0b","cross_cats_sorted":["cond-mat.mes-hall"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2013-02-21T21:03:33Z","title_canon_sha256":"d8e3ff988f915bb9b3935e552a4e0588ee1bae6cb213b86c1b7bc71e57fa7b58"},"schema_version":"1.0","source":{"id":"1302.5431","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1302.5431","created_at":"2026-05-18T02:39:46Z"},{"alias_kind":"arxiv_version","alias_value":"1302.5431v1","created_at":"2026-05-18T02:39:46Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1302.5431","created_at":"2026-05-18T02:39:46Z"},{"alias_kind":"pith_short_12","alias_value":"MW4TRPMDHD2G","created_at":"2026-05-18T12:27:52Z"},{"alias_kind":"pith_short_16","alias_value":"MW4TRPMDHD2GDLFA","created_at":"2026-05-18T12:27:52Z"},{"alias_kind":"pith_short_8","alias_value":"MW4TRPMD","created_at":"2026-05-18T12:27:52Z"}],"graph_snapshots":[{"event_id":"sha256:0850d7436fe7946ab86e0420c40e85c4475d25063ed75684434d6f4d0596e605","target":"graph","created_at":"2026-05-18T02:39:46Z","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":"The single-layer Mott insulator strontium iridate Sr$_2$IrO$_4$ was studied using a scanning tunneling microscope. This measurement technique is unique due to the transport properties of this Mott insulator allowing tunneling measurements to be performed, even at cryogenic temperatures. We obtained high-resolution images of the sample surface and the differential tunneling conductance at different cryogenic temperatures. The differential conductance is a direct measurement of the local electronic density of states which provided an insulating gap consistent with optical conductivity, angle res","authors_text":"Gang Cao, John Nichols, Kwok-Wai Ng, Noah Bray-Ali","cross_cats":["cond-mat.mes-hall"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2013-02-21T21:03:33Z","title":"Direct observation of the Mott gap in strontium iridate with a scanning tunneling microscope"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1302.5431","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":"sha256:265f3d1961c38df78ef13d4460f5098899469b2df795633398d9c662abb04d20","target":"record","created_at":"2026-05-18T02:39:46Z","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":"7c08baecb98cbe5b7ea2eceff56a8e3242473e03df0f6876e962c9c15ec9dd0b","cross_cats_sorted":["cond-mat.mes-hall"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2013-02-21T21:03:33Z","title_canon_sha256":"d8e3ff988f915bb9b3935e552a4e0588ee1bae6cb213b86c1b7bc71e57fa7b58"},"schema_version":"1.0","source":{"id":"1302.5431","kind":"arxiv","version":1}},"canonical_sha256":"65b938bd8338f461aca02663e0abd4eb60fc1c652d3ade7aec6b3ed1c1af9a6d","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"65b938bd8338f461aca02663e0abd4eb60fc1c652d3ade7aec6b3ed1c1af9a6d","first_computed_at":"2026-05-18T02:39:46.012365Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:39:46.012365Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"pZY5+SAnI5vPed+uGDTfND0NrSC2ulNLAhcClF5GVfnIlpnCQvC8IBrC+E4twJIxGa25bLZ6M9H8qqLDK28NBA==","signature_status":"signed_v1","signed_at":"2026-05-18T02:39:46.012897Z","signed_message":"canonical_sha256_bytes"},"source_id":"1302.5431","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:265f3d1961c38df78ef13d4460f5098899469b2df795633398d9c662abb04d20","sha256:0850d7436fe7946ab86e0420c40e85c4475d25063ed75684434d6f4d0596e605"],"state_sha256":"a5bc4f5fa7d1208f4f04ad0de5d60bebadf03e4db522ec61feb681ef793174d8"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"kAWKFYZlXpyFkjg/x+yRUoIa/ifOqzmj/nxBPDLtMEQk/aJNFwBjbilB2UxB74vn/TAQ/xjVsjHNUt6ixYTnBw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-02T19:58:00.980521Z","bundle_sha256":"f66312c71c36c72a0450eaabf4f25a21e532bd58d15a9595f21e7370711ecb85"}}