{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:BCL57MKEXG6SDLBNMYPLSPDXJI","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":"37a3afcea5fac230eafac7d7429bd69db9a88c7c489c72744bc6350fd3d95bf3","cross_cats_sorted":["cond-mat.mtrl-sci"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2014-01-30T12:11:31Z","title_canon_sha256":"39036c235356b541c6b60be7e0b131c78b4a5305528505d885622c86c95e5548"},"schema_version":"1.0","source":{"id":"1401.7817","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1401.7817","created_at":"2026-05-18T02:44:22Z"},{"alias_kind":"arxiv_version","alias_value":"1401.7817v2","created_at":"2026-05-18T02:44:22Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1401.7817","created_at":"2026-05-18T02:44:22Z"},{"alias_kind":"pith_short_12","alias_value":"BCL57MKEXG6S","created_at":"2026-05-18T12:28:22Z"},{"alias_kind":"pith_short_16","alias_value":"BCL57MKEXG6SDLBN","created_at":"2026-05-18T12:28:22Z"},{"alias_kind":"pith_short_8","alias_value":"BCL57MKE","created_at":"2026-05-18T12:28:22Z"}],"graph_snapshots":[{"event_id":"sha256:3a0ed4fadbfe997d386e0ffb5905370e29513dc7a82034fe82f9d6776653331d","target":"graph","created_at":"2026-05-18T02:44:22Z","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"},"paper":{"abstract_excerpt":"A combination of Scanning Tunneling Microscopy/Spectroscopy and Density Functional Theory (DFT+U) is used to characterize excess electrons in TiO$_2$ rutile and anatase, two prototypical materials with identical chemical composition but different crystal lattices. In rutile, excess electrons can localize at any lattice Ti atom, forming a small polaron, which can easily hop to neighboring sites. In contrast, electrons in anatase prefer a free-carrier state, and can only be trapped near oxygen vacancies or form shallow donor states bound to Nb dopants. The present study conclusively explains the","authors_text":"Anderson Janotti, Cesare Franchini, Chris Van de Walle, Georg Kresse, Martin Setvin, Merzuk Kaltak, Michael Schmid, Ulrike Diebold, Xianfeng Hao","cross_cats":["cond-mat.mtrl-sci"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2014-01-30T12:11:31Z","title":"A direct view at excess electrons in TiO$_2$ rutile and anatase"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1401.7817","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:d8eff12f4383ba7b8c53e451a717e3ef77b8c2b7ce22034df8bcf410e9da0424","target":"record","created_at":"2026-05-18T02:44:22Z","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":"37a3afcea5fac230eafac7d7429bd69db9a88c7c489c72744bc6350fd3d95bf3","cross_cats_sorted":["cond-mat.mtrl-sci"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2014-01-30T12:11:31Z","title_canon_sha256":"39036c235356b541c6b60be7e0b131c78b4a5305528505d885622c86c95e5548"},"schema_version":"1.0","source":{"id":"1401.7817","kind":"arxiv","version":2}},"canonical_sha256":"0897dfb144b9bd21ac2d661eb93c774a32e31b6fcad4567ff19d4446d4b6c95a","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"0897dfb144b9bd21ac2d661eb93c774a32e31b6fcad4567ff19d4446d4b6c95a","first_computed_at":"2026-05-18T02:44:22.875761Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:44:22.875761Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"IdH6qrb+h0QntX94onhGY8YStboNLxa0lCIrID72WDjU53izP/3WQiEFpsT+CDgFC5R/NH9jLF3o8HLbycfzCA==","signature_status":"signed_v1","signed_at":"2026-05-18T02:44:22.876160Z","signed_message":"canonical_sha256_bytes"},"source_id":"1401.7817","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:d8eff12f4383ba7b8c53e451a717e3ef77b8c2b7ce22034df8bcf410e9da0424","sha256:3a0ed4fadbfe997d386e0ffb5905370e29513dc7a82034fe82f9d6776653331d"],"state_sha256":"975c1ff0a60e982da6506c65ce12f612399a6fa8df7e205484e7d234400db2a2"}