{"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"}