{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2013:HS3VSCKB3BJXESFW5Q6BVQL73H","short_pith_number":"pith:HS3VSCKB","canonical_record":{"source":{"id":"1308.3212","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2013-08-14T19:05:12Z","cross_cats_sorted":[],"title_canon_sha256":"a58fe89c02c5c8180eeefe2a12899186c9cb074d17dac32e9e6e84dc34c23472","abstract_canon_sha256":"0e1899b6f8dc3d9d6920bc22017e0a99b764ba789304b673e8ce04f1724cbfa5"},"schema_version":"1.0"},"canonical_sha256":"3cb7590941d8537248b6ec3c1ac17fd9c6a2278b00c93057b72d60ec0e779fd8","source":{"kind":"arxiv","id":"1308.3212","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1308.3212","created_at":"2026-05-18T01:48:15Z"},{"alias_kind":"arxiv_version","alias_value":"1308.3212v2","created_at":"2026-05-18T01:48:15Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1308.3212","created_at":"2026-05-18T01:48:15Z"},{"alias_kind":"pith_short_12","alias_value":"HS3VSCKB3BJX","created_at":"2026-05-18T12:27:46Z"},{"alias_kind":"pith_short_16","alias_value":"HS3VSCKB3BJXESFW","created_at":"2026-05-18T12:27:46Z"},{"alias_kind":"pith_short_8","alias_value":"HS3VSCKB","created_at":"2026-05-18T12:27:46Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2013:HS3VSCKB3BJXESFW5Q6BVQL73H","target":"record","payload":{"canonical_record":{"source":{"id":"1308.3212","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2013-08-14T19:05:12Z","cross_cats_sorted":[],"title_canon_sha256":"a58fe89c02c5c8180eeefe2a12899186c9cb074d17dac32e9e6e84dc34c23472","abstract_canon_sha256":"0e1899b6f8dc3d9d6920bc22017e0a99b764ba789304b673e8ce04f1724cbfa5"},"schema_version":"1.0"},"canonical_sha256":"3cb7590941d8537248b6ec3c1ac17fd9c6a2278b00c93057b72d60ec0e779fd8","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:48:15.474954Z","signature_b64":"eetMQuSTCqD+qY4x6nRa+3Q8olIUL6OajY5ERAbDi6A4NoeMp227biBMHCgTNfM08n8d9BPSM5xeCMl2UzUvCQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"3cb7590941d8537248b6ec3c1ac17fd9c6a2278b00c93057b72d60ec0e779fd8","last_reissued_at":"2026-05-18T01:48:15.474495Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:48:15.474495Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1308.3212","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":"2026-05-18T01:48:15Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"BeFOvlPvYid+SnYGHqfBSSgI3NiCrh6XZj82ISLNxdd0f2JM+KN7L5FvTf8JUnDFC9YdFkvx4j0VL3lAtf/XDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T09:25:46.846439Z"},"content_sha256":"b5e55993fc5cebd82b725b71ac51769fd2b9bc839b939b2a633e0576c8929575","schema_version":"1.0","event_id":"sha256:b5e55993fc5cebd82b725b71ac51769fd2b9bc839b939b2a633e0576c8929575"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2013:HS3VSCKB3BJXESFW5Q6BVQL73H","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Thickness Dependent Carrier Density at the Surface of SrTiO3 (111) Slabs","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mtrl-sci","authors_text":"Di Xiao, H. Dixit, N. Sivadas, Valentino R. Cooper","submitted_at":"2013-08-14T19:05:12Z","abstract_excerpt":"We investigate the surface electronic structure and thermodynamic stability of the SrTiO3 (111) slabs using density functional theory. We observe that, for Ti-terminated slabs it is indeed possible to create a two-dimensional electron gas (2DEG). However, the carrier density of the 2DEG displays a strong thickness dependence due to the competition between electronic reconstruction and polar distortions. As expected, having a surface oxygen atom at the Ti termination can stabilize the system, eliminating any electronic reconstruction, thereby making the system insulating. An analysis of the sur"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1308.3212","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":""},"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":"2026-05-18T01:48:15Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"0IJLy7j8HBUZJiI5tx3gwymGoDdsP67IdJAfighCNY/mteuwVbQSkFdyQT1OrFowdP25RxvlT9LPc2gzmmOWCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T09:25:46.847009Z"},"content_sha256":"d670fa85d0d09dff70b64c21e696d03928d513c8be55a5da3733881d52fed174","schema_version":"1.0","event_id":"sha256:d670fa85d0d09dff70b64c21e696d03928d513c8be55a5da3733881d52fed174"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/HS3VSCKB3BJXESFW5Q6BVQL73H/bundle.json","state_url":"https://pith.science/pith/HS3VSCKB3BJXESFW5Q6BVQL73H/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/HS3VSCKB3BJXESFW5Q6BVQL73H/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":"2026-05-30T09:25:46Z","links":{"resolver":"https://pith.science/pith/HS3VSCKB3BJXESFW5Q6BVQL73H","bundle":"https://pith.science/pith/HS3VSCKB3BJXESFW5Q6BVQL73H/bundle.json","state":"https://pith.science/pith/HS3VSCKB3BJXESFW5Q6BVQL73H/state.json","well_known_bundle":"https://pith.science/.well-known/pith/HS3VSCKB3BJXESFW5Q6BVQL73H/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:HS3VSCKB3BJXESFW5Q6BVQL73H","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":"0e1899b6f8dc3d9d6920bc22017e0a99b764ba789304b673e8ce04f1724cbfa5","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2013-08-14T19:05:12Z","title_canon_sha256":"a58fe89c02c5c8180eeefe2a12899186c9cb074d17dac32e9e6e84dc34c23472"},"schema_version":"1.0","source":{"id":"1308.3212","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1308.3212","created_at":"2026-05-18T01:48:15Z"},{"alias_kind":"arxiv_version","alias_value":"1308.3212v2","created_at":"2026-05-18T01:48:15Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1308.3212","created_at":"2026-05-18T01:48:15Z"},{"alias_kind":"pith_short_12","alias_value":"HS3VSCKB3BJX","created_at":"2026-05-18T12:27:46Z"},{"alias_kind":"pith_short_16","alias_value":"HS3VSCKB3BJXESFW","created_at":"2026-05-18T12:27:46Z"},{"alias_kind":"pith_short_8","alias_value":"HS3VSCKB","created_at":"2026-05-18T12:27:46Z"}],"graph_snapshots":[{"event_id":"sha256:d670fa85d0d09dff70b64c21e696d03928d513c8be55a5da3733881d52fed174","target":"graph","created_at":"2026-05-18T01:48:15Z","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":"We investigate the surface electronic structure and thermodynamic stability of the SrTiO3 (111) slabs using density functional theory. We observe that, for Ti-terminated slabs it is indeed possible to create a two-dimensional electron gas (2DEG). However, the carrier density of the 2DEG displays a strong thickness dependence due to the competition between electronic reconstruction and polar distortions. As expected, having a surface oxygen atom at the Ti termination can stabilize the system, eliminating any electronic reconstruction, thereby making the system insulating. An analysis of the sur","authors_text":"Di Xiao, H. Dixit, N. Sivadas, Valentino R. Cooper","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2013-08-14T19:05:12Z","title":"Thickness Dependent Carrier Density at the Surface of SrTiO3 (111) Slabs"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1308.3212","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:b5e55993fc5cebd82b725b71ac51769fd2b9bc839b939b2a633e0576c8929575","target":"record","created_at":"2026-05-18T01:48:15Z","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":"0e1899b6f8dc3d9d6920bc22017e0a99b764ba789304b673e8ce04f1724cbfa5","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2013-08-14T19:05:12Z","title_canon_sha256":"a58fe89c02c5c8180eeefe2a12899186c9cb074d17dac32e9e6e84dc34c23472"},"schema_version":"1.0","source":{"id":"1308.3212","kind":"arxiv","version":2}},"canonical_sha256":"3cb7590941d8537248b6ec3c1ac17fd9c6a2278b00c93057b72d60ec0e779fd8","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"3cb7590941d8537248b6ec3c1ac17fd9c6a2278b00c93057b72d60ec0e779fd8","first_computed_at":"2026-05-18T01:48:15.474495Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:48:15.474495Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"eetMQuSTCqD+qY4x6nRa+3Q8olIUL6OajY5ERAbDi6A4NoeMp227biBMHCgTNfM08n8d9BPSM5xeCMl2UzUvCQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:48:15.474954Z","signed_message":"canonical_sha256_bytes"},"source_id":"1308.3212","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:b5e55993fc5cebd82b725b71ac51769fd2b9bc839b939b2a633e0576c8929575","sha256:d670fa85d0d09dff70b64c21e696d03928d513c8be55a5da3733881d52fed174"],"state_sha256":"452e0a01a19790f2eafbc5c4abc14a8af962e10ab58043bbab0da8babac6656f"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"EB2NdKjb1cjH4bfZ1r9J/0HyPCPhXtndF+UwaT0RVWHa+syaCfKUpbhgqSjEOWU1jJ7DSetQ3D0DDeW9M0LtCw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-30T09:25:46.850690Z","bundle_sha256":"1b2463a9f7b1c44b814ab431baa06dbc5ba7eae467e65def7de0735b9e0a65da"}}