{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2008:2JPUSCYY43HKCJ4SP7AWCLZD3B","short_pith_number":"pith:2JPUSCYY","canonical_record":{"source":{"id":"0802.2813","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2008-02-20T13:41:14Z","cross_cats_sorted":["cond-mat.mtrl-sci"],"title_canon_sha256":"87a13e2a2286498a56dea301e259f1944c21aaa025226ad764c35e5812aca572","abstract_canon_sha256":"16308d5d32321f5bd213df79381c4a82e42bc69219fbc8ac31dab478b10479bf"},"schema_version":"1.0"},"canonical_sha256":"d25f490b18e6cea127927fc1612f23d863373427eb6762bcf9b96672476b5ce5","source":{"kind":"arxiv","id":"0802.2813","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0802.2813","created_at":"2026-07-04T15:40:22Z"},{"alias_kind":"arxiv_version","alias_value":"0802.2813v2","created_at":"2026-07-04T15:40:22Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0802.2813","created_at":"2026-07-04T15:40:22Z"},{"alias_kind":"pith_short_12","alias_value":"2JPUSCYY43HK","created_at":"2026-07-04T15:40:22Z"},{"alias_kind":"pith_short_16","alias_value":"2JPUSCYY43HKCJ4S","created_at":"2026-07-04T15:40:22Z"},{"alias_kind":"pith_short_8","alias_value":"2JPUSCYY","created_at":"2026-07-04T15:40:22Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2008:2JPUSCYY43HKCJ4SP7AWCLZD3B","target":"record","payload":{"canonical_record":{"source":{"id":"0802.2813","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2008-02-20T13:41:14Z","cross_cats_sorted":["cond-mat.mtrl-sci"],"title_canon_sha256":"87a13e2a2286498a56dea301e259f1944c21aaa025226ad764c35e5812aca572","abstract_canon_sha256":"16308d5d32321f5bd213df79381c4a82e42bc69219fbc8ac31dab478b10479bf"},"schema_version":"1.0"},"canonical_sha256":"d25f490b18e6cea127927fc1612f23d863373427eb6762bcf9b96672476b5ce5","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T15:40:22.837875Z","signature_b64":"g6yZnpKeKb0GE/P0Y6+aY98d23rgXMtHs+xr6x9JFtQHYGB3g9fXJcZKJcUu4ZxwP8lX39S7+Sk6D99RJ4MaDg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"d25f490b18e6cea127927fc1612f23d863373427eb6762bcf9b96672476b5ce5","last_reissued_at":"2026-07-04T15:40:22.837455Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T15:40:22.837455Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0802.2813","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":"2026-07-04T15:40:22Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"CnVC7+HxayhMlexZU2u561u4JeHoSgpEEZAvkVDqThG/dlL/lLSc2Btw3Z3zroapHATf+45p5zhYgzBmO3loDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-11T02:52:35.198630Z"},"content_sha256":"1016c09c5d393ac58974de753a939590c5e76d0d9362221ab1771db8dd29a79e","schema_version":"1.0","event_id":"sha256:1016c09c5d393ac58974de753a939590c5e76d0d9362221ab1771db8dd29a79e"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2008:2JPUSCYY43HKCJ4SP7AWCLZD3B","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Evidence for the formation of a Mott state in potassium-intercalated pentacene","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.mtrl-sci"],"primary_cat":"cond-mat.str-el","authors_text":"A. F. Morpurgo, G. Brocks, G. Giovannetti, J. van den Brink, M. F. Craciun, S. Rogge","submitted_at":"2008-02-20T13:41:14Z","abstract_excerpt":"We investigate electronic transport through pentacene thin-films intercalated with potassium. From temperature-dependent conductivity measurements we find that potassium-intercalated pentacene shows metallic behavior in a broad range of potassium concentrations. Surprisingly, the conductivity exhibits a re-entrance into an insulating state when the potassium concentration is increased past one atom per molecule. We analyze our observations theoretically by means of electronic structure calculations, and we conclude that the phenomenon originates from a Mott metal-insulator transition, driven b"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0802.2813","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/0802.2813/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2026-07-04T15:40:22Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"1TTx6jns/Wmzh5OKTsfKP2kFGNr2pFCCDbdAs0t2edskiz3aRj64+6fzZW2YZbgxFyY+X31OyAFKnHGBo2kBBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-11T02:52:35.199220Z"},"content_sha256":"ad2e0eed3b9b671e2cbd01fdac42ea70d8bbdb27b8d06c5d5aecbaadf151be6c","schema_version":"1.0","event_id":"sha256:ad2e0eed3b9b671e2cbd01fdac42ea70d8bbdb27b8d06c5d5aecbaadf151be6c"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/2JPUSCYY43HKCJ4SP7AWCLZD3B/bundle.json","state_url":"https://pith.science/pith/2JPUSCYY43HKCJ4SP7AWCLZD3B/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/2JPUSCYY43HKCJ4SP7AWCLZD3B/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":"2026-08-11T02:52:35Z","links":{"resolver":"https://pith.science/pith/2JPUSCYY43HKCJ4SP7AWCLZD3B","bundle":"https://pith.science/pith/2JPUSCYY43HKCJ4SP7AWCLZD3B/bundle.json","state":"https://pith.science/pith/2JPUSCYY43HKCJ4SP7AWCLZD3B/state.json","well_known_bundle":"https://pith.science/.well-known/pith/2JPUSCYY43HKCJ4SP7AWCLZD3B/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2008:2JPUSCYY43HKCJ4SP7AWCLZD3B","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":"16308d5d32321f5bd213df79381c4a82e42bc69219fbc8ac31dab478b10479bf","cross_cats_sorted":["cond-mat.mtrl-sci"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2008-02-20T13:41:14Z","title_canon_sha256":"87a13e2a2286498a56dea301e259f1944c21aaa025226ad764c35e5812aca572"},"schema_version":"1.0","source":{"id":"0802.2813","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0802.2813","created_at":"2026-07-04T15:40:22Z"},{"alias_kind":"arxiv_version","alias_value":"0802.2813v2","created_at":"2026-07-04T15:40:22Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0802.2813","created_at":"2026-07-04T15:40:22Z"},{"alias_kind":"pith_short_12","alias_value":"2JPUSCYY43HK","created_at":"2026-07-04T15:40:22Z"},{"alias_kind":"pith_short_16","alias_value":"2JPUSCYY43HKCJ4S","created_at":"2026-07-04T15:40:22Z"},{"alias_kind":"pith_short_8","alias_value":"2JPUSCYY","created_at":"2026-07-04T15:40:22Z"}],"graph_snapshots":[{"event_id":"sha256:ad2e0eed3b9b671e2cbd01fdac42ea70d8bbdb27b8d06c5d5aecbaadf151be6c","target":"graph","created_at":"2026-07-04T15:40:22Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/0802.2813/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We investigate electronic transport through pentacene thin-films intercalated with potassium. From temperature-dependent conductivity measurements we find that potassium-intercalated pentacene shows metallic behavior in a broad range of potassium concentrations. Surprisingly, the conductivity exhibits a re-entrance into an insulating state when the potassium concentration is increased past one atom per molecule. We analyze our observations theoretically by means of electronic structure calculations, and we conclude that the phenomenon originates from a Mott metal-insulator transition, driven b","authors_text":"A. F. Morpurgo, G. Brocks, G. Giovannetti, J. van den Brink, M. F. Craciun, S. Rogge","cross_cats":["cond-mat.mtrl-sci"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2008-02-20T13:41:14Z","title":"Evidence for the formation of a Mott state in potassium-intercalated pentacene"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0802.2813","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":"sha256:1016c09c5d393ac58974de753a939590c5e76d0d9362221ab1771db8dd29a79e","target":"record","created_at":"2026-07-04T15:40:22Z","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":"16308d5d32321f5bd213df79381c4a82e42bc69219fbc8ac31dab478b10479bf","cross_cats_sorted":["cond-mat.mtrl-sci"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2008-02-20T13:41:14Z","title_canon_sha256":"87a13e2a2286498a56dea301e259f1944c21aaa025226ad764c35e5812aca572"},"schema_version":"1.0","source":{"id":"0802.2813","kind":"arxiv","version":2}},"canonical_sha256":"d25f490b18e6cea127927fc1612f23d863373427eb6762bcf9b96672476b5ce5","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"d25f490b18e6cea127927fc1612f23d863373427eb6762bcf9b96672476b5ce5","first_computed_at":"2026-07-04T15:40:22.837455Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T15:40:22.837455Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"g6yZnpKeKb0GE/P0Y6+aY98d23rgXMtHs+xr6x9JFtQHYGB3g9fXJcZKJcUu4ZxwP8lX39S7+Sk6D99RJ4MaDg==","signature_status":"signed_v1","signed_at":"2026-07-04T15:40:22.837875Z","signed_message":"canonical_sha256_bytes"},"source_id":"0802.2813","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:1016c09c5d393ac58974de753a939590c5e76d0d9362221ab1771db8dd29a79e","sha256:ad2e0eed3b9b671e2cbd01fdac42ea70d8bbdb27b8d06c5d5aecbaadf151be6c"],"state_sha256":"3ca410ad9fd00354132bd41d61ef74df82ab23ca183f0ad2286bd37e65c15ff5"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"B9673hyjK2oCGMy6Cx+yCruc/WEkWMJF+zG5dVFQmE5zQPkaZhei5R3guaaFiqKbhmzwWIg6e9FpHt7hWDx/AA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-11T02:52:35.204185Z","bundle_sha256":"7ed7c4b12e8c3ff57348455025a86a4d013ce402b3528a4149b981e2d868108d"}}