{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2008:WMVKYL3DPQ6QC23C3MHF7PBQFT","short_pith_number":"pith:WMVKYL3D","canonical_record":{"source":{"id":"0809.1917","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2008-09-11T14:27:13Z","cross_cats_sorted":[],"title_canon_sha256":"dd4a50a74721e793ad4d764a35fdaaa99258bb80fe2e7790a9c1db9caf09d94b","abstract_canon_sha256":"f2d8ae43f94c13e36112c50e478ed135bba328a3593d30d0996af7c3c133a882"},"schema_version":"1.0"},"canonical_sha256":"b32aac2f637c3d016b62db0e5fbc302cc15e680ba02d3286290281e7cc8ba1dc","source":{"kind":"arxiv","id":"0809.1917","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0809.1917","created_at":"2026-05-18T02:15:34Z"},{"alias_kind":"arxiv_version","alias_value":"0809.1917v2","created_at":"2026-05-18T02:15:34Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0809.1917","created_at":"2026-05-18T02:15:34Z"},{"alias_kind":"pith_short_12","alias_value":"WMVKYL3DPQ6Q","created_at":"2026-05-18T12:25:58Z"},{"alias_kind":"pith_short_16","alias_value":"WMVKYL3DPQ6QC23C","created_at":"2026-05-18T12:25:58Z"},{"alias_kind":"pith_short_8","alias_value":"WMVKYL3D","created_at":"2026-05-18T12:25:58Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2008:WMVKYL3DPQ6QC23C3MHF7PBQFT","target":"record","payload":{"canonical_record":{"source":{"id":"0809.1917","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2008-09-11T14:27:13Z","cross_cats_sorted":[],"title_canon_sha256":"dd4a50a74721e793ad4d764a35fdaaa99258bb80fe2e7790a9c1db9caf09d94b","abstract_canon_sha256":"f2d8ae43f94c13e36112c50e478ed135bba328a3593d30d0996af7c3c133a882"},"schema_version":"1.0"},"canonical_sha256":"b32aac2f637c3d016b62db0e5fbc302cc15e680ba02d3286290281e7cc8ba1dc","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:15:34.929131Z","signature_b64":"ky4s9wkIVDi0nJSMgSq7ihkiMZIgKCsnY/s1jSZVLJdFchh3w0948BhzYkiAbAnGn1H4SXfRnASwj4VfT9GWBw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"b32aac2f637c3d016b62db0e5fbc302cc15e680ba02d3286290281e7cc8ba1dc","last_reissued_at":"2026-05-18T02:15:34.928383Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:15:34.928383Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0809.1917","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":"2026-05-18T02:15:34Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Wuzd8YXye4RApeZpZ1NizyzbFLOMyEU3kNQ1kQXDlNh48TgaKnImUsAeGRFTOlK83UvTq5e4TumWkTh7f6X3Dw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T20:30:09.752072Z"},"content_sha256":"b18151126a3007774bdff27643832c1bebec6e5a2439c4c3335dcbdaf0267918","schema_version":"1.0","event_id":"sha256:b18151126a3007774bdff27643832c1bebec6e5a2439c4c3335dcbdaf0267918"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2008:WMVKYL3DPQ6QC23C3MHF7PBQFT","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Profiling the interface electron gas of LaAlO3/SrTiO3 heterostructures by hard X-ray photoelectron spectroscopy","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.str-el","authors_text":"A. Muller, A. Ruff, A. Wetscherek, C. W. Schneider, F. Schafers, G. Berner, J. Mannhart, K. Goss, M. Gorgoi, M. Sing, P. R. Willmott, R. Claessen, S. A. Pauli, S. Thiel","submitted_at":"2008-09-11T14:27:13Z","abstract_excerpt":"The conducting interface of LaAlO$_3$/SrTiO$_3$ heterostructures has been studied by hard X-ray photoelectron spectroscopy. From the Ti~2$p$ signal and its angle-dependence we derive that the thickness of the electron gas is much smaller than the probing depth of 4 nm and that the carrier densities vary with increasing number of LaAlO$_3$ overlayers. Our results point to an electronic reconstruction in the LaAlO$_3$ overlayer as the driving mechanism for the conducting interface and corroborate the recent interpretation of the superconducting ground state as being of the Berezinskii-Kosterlitz"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0809.1917","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":"2026-05-18T02:15:34Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"K7Rm+dwTpWxo7IitMlaIYrS7GOXSKpCkQDSaubbyQ/SsBI8j+NCCyw+J5WxpSvXkhnOM4f4VWIxMGu1I4Fd2CA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T20:30:09.752705Z"},"content_sha256":"686f4361ecace59b5a7d801a832113f0843b23243ce0c39c208ac12444d1b1cd","schema_version":"1.0","event_id":"sha256:686f4361ecace59b5a7d801a832113f0843b23243ce0c39c208ac12444d1b1cd"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/WMVKYL3DPQ6QC23C3MHF7PBQFT/bundle.json","state_url":"https://pith.science/pith/WMVKYL3DPQ6QC23C3MHF7PBQFT/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/WMVKYL3DPQ6QC23C3MHF7PBQFT/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":"2026-05-30T20:30:09Z","links":{"resolver":"https://pith.science/pith/WMVKYL3DPQ6QC23C3MHF7PBQFT","bundle":"https://pith.science/pith/WMVKYL3DPQ6QC23C3MHF7PBQFT/bundle.json","state":"https://pith.science/pith/WMVKYL3DPQ6QC23C3MHF7PBQFT/state.json","well_known_bundle":"https://pith.science/.well-known/pith/WMVKYL3DPQ6QC23C3MHF7PBQFT/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2008:WMVKYL3DPQ6QC23C3MHF7PBQFT","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":"f2d8ae43f94c13e36112c50e478ed135bba328a3593d30d0996af7c3c133a882","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2008-09-11T14:27:13Z","title_canon_sha256":"dd4a50a74721e793ad4d764a35fdaaa99258bb80fe2e7790a9c1db9caf09d94b"},"schema_version":"1.0","source":{"id":"0809.1917","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0809.1917","created_at":"2026-05-18T02:15:34Z"},{"alias_kind":"arxiv_version","alias_value":"0809.1917v2","created_at":"2026-05-18T02:15:34Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0809.1917","created_at":"2026-05-18T02:15:34Z"},{"alias_kind":"pith_short_12","alias_value":"WMVKYL3DPQ6Q","created_at":"2026-05-18T12:25:58Z"},{"alias_kind":"pith_short_16","alias_value":"WMVKYL3DPQ6QC23C","created_at":"2026-05-18T12:25:58Z"},{"alias_kind":"pith_short_8","alias_value":"WMVKYL3D","created_at":"2026-05-18T12:25:58Z"}],"graph_snapshots":[{"event_id":"sha256:686f4361ecace59b5a7d801a832113f0843b23243ce0c39c208ac12444d1b1cd","target":"graph","created_at":"2026-05-18T02:15:34Z","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 conducting interface of LaAlO$_3$/SrTiO$_3$ heterostructures has been studied by hard X-ray photoelectron spectroscopy. From the Ti~2$p$ signal and its angle-dependence we derive that the thickness of the electron gas is much smaller than the probing depth of 4 nm and that the carrier densities vary with increasing number of LaAlO$_3$ overlayers. Our results point to an electronic reconstruction in the LaAlO$_3$ overlayer as the driving mechanism for the conducting interface and corroborate the recent interpretation of the superconducting ground state as being of the Berezinskii-Kosterlitz","authors_text":"A. Muller, A. Ruff, A. Wetscherek, C. W. Schneider, F. Schafers, G. Berner, J. Mannhart, K. Goss, M. Gorgoi, M. Sing, P. R. Willmott, R. Claessen, S. A. Pauli, S. Thiel","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2008-09-11T14:27:13Z","title":"Profiling the interface electron gas of LaAlO3/SrTiO3 heterostructures by hard X-ray photoelectron spectroscopy"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0809.1917","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:b18151126a3007774bdff27643832c1bebec6e5a2439c4c3335dcbdaf0267918","target":"record","created_at":"2026-05-18T02:15:34Z","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":"f2d8ae43f94c13e36112c50e478ed135bba328a3593d30d0996af7c3c133a882","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2008-09-11T14:27:13Z","title_canon_sha256":"dd4a50a74721e793ad4d764a35fdaaa99258bb80fe2e7790a9c1db9caf09d94b"},"schema_version":"1.0","source":{"id":"0809.1917","kind":"arxiv","version":2}},"canonical_sha256":"b32aac2f637c3d016b62db0e5fbc302cc15e680ba02d3286290281e7cc8ba1dc","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"b32aac2f637c3d016b62db0e5fbc302cc15e680ba02d3286290281e7cc8ba1dc","first_computed_at":"2026-05-18T02:15:34.928383Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:15:34.928383Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"ky4s9wkIVDi0nJSMgSq7ihkiMZIgKCsnY/s1jSZVLJdFchh3w0948BhzYkiAbAnGn1H4SXfRnASwj4VfT9GWBw==","signature_status":"signed_v1","signed_at":"2026-05-18T02:15:34.929131Z","signed_message":"canonical_sha256_bytes"},"source_id":"0809.1917","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:b18151126a3007774bdff27643832c1bebec6e5a2439c4c3335dcbdaf0267918","sha256:686f4361ecace59b5a7d801a832113f0843b23243ce0c39c208ac12444d1b1cd"],"state_sha256":"7dd90e151fcf2b0e1c0645df7a9d1ce3d4e1a59f4599485bba1b4f2254754928"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"UjfaWTzWRhMZOvY/QZe60V/3ILB8i4MXxIYHwq6bW+KOMeortBpi86jD1Jsw+SweOKWBzixgacGR+1fUIE16BQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-30T20:30:09.756044Z","bundle_sha256":"e9a1e23f088242a21aff7cda18f5e74b6b5b84a7ee9598c1fd103720f1723ee8"}}