{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2008:3SGH6LEPJTM7KMBM5ZZ3EHULZP","short_pith_number":"pith:3SGH6LEP","canonical_record":{"source":{"id":"0805.3635","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2008-05-23T13:11:48Z","cross_cats_sorted":[],"title_canon_sha256":"58d960527958c91b86d070a93128f17be35b32c9e8d36914fa7fe33df4c22382","abstract_canon_sha256":"0a33577803e483edb8fefe5878889d23edad7b1131fcadb205b21176df30bd05"},"schema_version":"1.0"},"canonical_sha256":"dc8c7f2c8f4cd9f5302cee73b21e8bcbe3c31af4cdec18ee21e69646e36e4bce","source":{"kind":"arxiv","id":"0805.3635","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0805.3635","created_at":"2026-07-04T15:33:11Z"},{"alias_kind":"arxiv_version","alias_value":"0805.3635v1","created_at":"2026-07-04T15:33:11Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0805.3635","created_at":"2026-07-04T15:33:11Z"},{"alias_kind":"pith_short_12","alias_value":"3SGH6LEPJTM7","created_at":"2026-07-04T15:33:11Z"},{"alias_kind":"pith_short_16","alias_value":"3SGH6LEPJTM7KMBM","created_at":"2026-07-04T15:33:11Z"},{"alias_kind":"pith_short_8","alias_value":"3SGH6LEP","created_at":"2026-07-04T15:33:11Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2008:3SGH6LEPJTM7KMBM5ZZ3EHULZP","target":"record","payload":{"canonical_record":{"source":{"id":"0805.3635","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2008-05-23T13:11:48Z","cross_cats_sorted":[],"title_canon_sha256":"58d960527958c91b86d070a93128f17be35b32c9e8d36914fa7fe33df4c22382","abstract_canon_sha256":"0a33577803e483edb8fefe5878889d23edad7b1131fcadb205b21176df30bd05"},"schema_version":"1.0"},"canonical_sha256":"dc8c7f2c8f4cd9f5302cee73b21e8bcbe3c31af4cdec18ee21e69646e36e4bce","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T15:33:11.771862Z","signature_b64":"1aXIOS8kYvF1sVk9fmkdPTP8s44Q0A5TVcUxS119kE+8XptqQ4/EROebRMFtVUx1lP7S23xK8CIvYOM9Qu3uBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"dc8c7f2c8f4cd9f5302cee73b21e8bcbe3c31af4cdec18ee21e69646e36e4bce","last_reissued_at":"2026-07-04T15:33:11.771429Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T15:33:11.771429Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0805.3635","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":"2026-07-04T15:33:11Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"mEm7Dlbb2Gw9Qwq93pWLV3ExI4jjl8WfFqvDKtXBIFUeG0IWDdjxncyBTnFVgtWg7OX1UvgPTLwpEp3Eb6IoDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-14T10:04:58.375571Z"},"content_sha256":"452eaefddfacbcf3c8e81e4e69663e905734454cffbe7643d00dc29ae352deb6","schema_version":"1.0","event_id":"sha256:452eaefddfacbcf3c8e81e4e69663e905734454cffbe7643d00dc29ae352deb6"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2008:3SGH6LEPJTM7KMBM5ZZ3EHULZP","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Charge ordering and magnetism in quarter-filled Hubbard-Holstein model","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.str-el","authors_text":"Jeroen van den Brink, Sanjeev Kumar","submitted_at":"2008-05-23T13:11:48Z","abstract_excerpt":"We study a two-dimensional Hubbard-Holstein model with phonons treated in the adiabatic limit. A Hartree-Fock decomposition is employed for the Hubbard term. A range of electronic densities are discussed with special emphasis on the quarter-filling ($n=0.5$). We argue that the quarter-filled system is relevant for the electronic properties observed at the interface between LaAlO$_3$ and SrTiO$_3$, where half-electron per unit cell is transferred to the TiO$_2$ layer as a consequence of the polar discontinuity at the interface. In addition to presenting the overall phase diagrams, we identify a"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0805.3635","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/0805.3635/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":"2026-07-04T15:33:11Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Z7Ge5ZU8SPaODB9fOTfLvbkwYK58mr1QcGTHPHo3xJAKHLVPEhfUoJNBRL46vA0ldUzs/H0czWO5agLcZ74xCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-14T10:04:58.376083Z"},"content_sha256":"b57f647ba967b721745a35a94752fe760761640179340eaa5d2f133e218abdb8","schema_version":"1.0","event_id":"sha256:b57f647ba967b721745a35a94752fe760761640179340eaa5d2f133e218abdb8"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/3SGH6LEPJTM7KMBM5ZZ3EHULZP/bundle.json","state_url":"https://pith.science/pith/3SGH6LEPJTM7KMBM5ZZ3EHULZP/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/3SGH6LEPJTM7KMBM5ZZ3EHULZP/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":"2026-08-14T10:04:58Z","links":{"resolver":"https://pith.science/pith/3SGH6LEPJTM7KMBM5ZZ3EHULZP","bundle":"https://pith.science/pith/3SGH6LEPJTM7KMBM5ZZ3EHULZP/bundle.json","state":"https://pith.science/pith/3SGH6LEPJTM7KMBM5ZZ3EHULZP/state.json","well_known_bundle":"https://pith.science/.well-known/pith/3SGH6LEPJTM7KMBM5ZZ3EHULZP/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2008:3SGH6LEPJTM7KMBM5ZZ3EHULZP","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":"0a33577803e483edb8fefe5878889d23edad7b1131fcadb205b21176df30bd05","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2008-05-23T13:11:48Z","title_canon_sha256":"58d960527958c91b86d070a93128f17be35b32c9e8d36914fa7fe33df4c22382"},"schema_version":"1.0","source":{"id":"0805.3635","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0805.3635","created_at":"2026-07-04T15:33:11Z"},{"alias_kind":"arxiv_version","alias_value":"0805.3635v1","created_at":"2026-07-04T15:33:11Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0805.3635","created_at":"2026-07-04T15:33:11Z"},{"alias_kind":"pith_short_12","alias_value":"3SGH6LEPJTM7","created_at":"2026-07-04T15:33:11Z"},{"alias_kind":"pith_short_16","alias_value":"3SGH6LEPJTM7KMBM","created_at":"2026-07-04T15:33:11Z"},{"alias_kind":"pith_short_8","alias_value":"3SGH6LEP","created_at":"2026-07-04T15:33:11Z"}],"graph_snapshots":[{"event_id":"sha256:b57f647ba967b721745a35a94752fe760761640179340eaa5d2f133e218abdb8","target":"graph","created_at":"2026-07-04T15:33:11Z","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/0805.3635/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We study a two-dimensional Hubbard-Holstein model with phonons treated in the adiabatic limit. A Hartree-Fock decomposition is employed for the Hubbard term. A range of electronic densities are discussed with special emphasis on the quarter-filling ($n=0.5$). We argue that the quarter-filled system is relevant for the electronic properties observed at the interface between LaAlO$_3$ and SrTiO$_3$, where half-electron per unit cell is transferred to the TiO$_2$ layer as a consequence of the polar discontinuity at the interface. In addition to presenting the overall phase diagrams, we identify a","authors_text":"Jeroen van den Brink, Sanjeev Kumar","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2008-05-23T13:11:48Z","title":"Charge ordering and magnetism in quarter-filled Hubbard-Holstein model"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0805.3635","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":"sha256:452eaefddfacbcf3c8e81e4e69663e905734454cffbe7643d00dc29ae352deb6","target":"record","created_at":"2026-07-04T15:33:11Z","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":"0a33577803e483edb8fefe5878889d23edad7b1131fcadb205b21176df30bd05","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2008-05-23T13:11:48Z","title_canon_sha256":"58d960527958c91b86d070a93128f17be35b32c9e8d36914fa7fe33df4c22382"},"schema_version":"1.0","source":{"id":"0805.3635","kind":"arxiv","version":1}},"canonical_sha256":"dc8c7f2c8f4cd9f5302cee73b21e8bcbe3c31af4cdec18ee21e69646e36e4bce","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"dc8c7f2c8f4cd9f5302cee73b21e8bcbe3c31af4cdec18ee21e69646e36e4bce","first_computed_at":"2026-07-04T15:33:11.771429Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T15:33:11.771429Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"1aXIOS8kYvF1sVk9fmkdPTP8s44Q0A5TVcUxS119kE+8XptqQ4/EROebRMFtVUx1lP7S23xK8CIvYOM9Qu3uBQ==","signature_status":"signed_v1","signed_at":"2026-07-04T15:33:11.771862Z","signed_message":"canonical_sha256_bytes"},"source_id":"0805.3635","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:452eaefddfacbcf3c8e81e4e69663e905734454cffbe7643d00dc29ae352deb6","sha256:b57f647ba967b721745a35a94752fe760761640179340eaa5d2f133e218abdb8"],"state_sha256":"795e2769962139611d8587f86c8c1103af182621e3a566879c5a471ac3489d25"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"h5OVuqbt1pn4YrTXMxhK5drFvq9qgTfnNw6GsSd57ywlFmTln6Rr69wpR+apag7Ynm47+OEMGR+tbpuvjLqhAw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-14T10:04:58.380974Z","bundle_sha256":"ef7161b79ea132e73d23190de21932ad6d3d6b5ab1db297c5ba3dc1f58d04699"}}