{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2021:GSGOCPFENL52F2QSCSLID4CO55","short_pith_number":"pith:GSGOCPFE","canonical_record":{"source":{"id":"2105.00154","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2021-05-01T03:07:09Z","cross_cats_sorted":[],"title_canon_sha256":"c309710532323799b6d7a5f924a563a1e9a159f8ef66c8870fe4d378054b1f30","abstract_canon_sha256":"234d654d2941a8c2826427f5c3243997add4f106969448bc6e1ea8eed8991ba8"},"schema_version":"1.0"},"canonical_sha256":"348ce13ca46afba2ea12149681f04eef4913bdc0af5f3840f57547f656abf45c","source":{"kind":"arxiv","id":"2105.00154","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2105.00154","created_at":"2026-07-05T02:36:34Z"},{"alias_kind":"arxiv_version","alias_value":"2105.00154v1","created_at":"2026-07-05T02:36:34Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2105.00154","created_at":"2026-07-05T02:36:34Z"},{"alias_kind":"pith_short_12","alias_value":"GSGOCPFENL52","created_at":"2026-07-05T02:36:34Z"},{"alias_kind":"pith_short_16","alias_value":"GSGOCPFENL52F2QS","created_at":"2026-07-05T02:36:34Z"},{"alias_kind":"pith_short_8","alias_value":"GSGOCPFE","created_at":"2026-07-05T02:36:34Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2021:GSGOCPFENL52F2QSCSLID4CO55","target":"record","payload":{"canonical_record":{"source":{"id":"2105.00154","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2021-05-01T03:07:09Z","cross_cats_sorted":[],"title_canon_sha256":"c309710532323799b6d7a5f924a563a1e9a159f8ef66c8870fe4d378054b1f30","abstract_canon_sha256":"234d654d2941a8c2826427f5c3243997add4f106969448bc6e1ea8eed8991ba8"},"schema_version":"1.0"},"canonical_sha256":"348ce13ca46afba2ea12149681f04eef4913bdc0af5f3840f57547f656abf45c","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T02:36:34.721693Z","signature_b64":"+9XsQkB1ZV50yTT/YFr9L2ha3pVdMPXeNLth1x45iLvGx5pLXojjW/kFTW8x+5iO+/A28RBaZEodsGmdzNucDw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"348ce13ca46afba2ea12149681f04eef4913bdc0af5f3840f57547f656abf45c","last_reissued_at":"2026-07-05T02:36:34.721229Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T02:36:34.721229Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2105.00154","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":"2026-07-05T02:36:34Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"o1YFsvPtWP268qh8c0BE/yMr3SMsa84nw4VEyNoX89xEgUg0NxVc+IbOEC6WE+2EqNcXoRYSG/VBMNHcz3rpDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-07T13:23:41.348253Z"},"content_sha256":"505c012557d1d5984a86a5f81699e0d3bc8f7b5c1c407415bf424deab20fce1f","schema_version":"1.0","event_id":"sha256:505c012557d1d5984a86a5f81699e0d3bc8f7b5c1c407415bf424deab20fce1f"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2021:GSGOCPFENL52F2QSCSLID4CO55","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Enhanced metal-insulator transition in freestanding VO2 down to 5 nm thickness","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mtrl-sci","authors_text":"Chen Ye, Dong-Chen Qi, Hanyu Wang, Hongna Xing, Ke Huang, Kun Han, Liang Wu, M. Motapothula, Xiao Li, Xinghua Li, X. Renshaw Wang, Yu Cao","submitted_at":"2021-05-01T03:07:09Z","abstract_excerpt":"Ultrathin freestanding membranes with a pronounced metal-insulator transition (MIT) provides huge potential in future flexible electronic applications as well as a unique aspect of the study of lattice-electron interplay. However, the reduction of the thickness to an ultrathin region (a few nm) is typically detrimental to the MIT in epitaxial films, and even catastrophic for their freestanding form. Here, we report an enhanced MIT in VO2-based freestanding membranes, with a lateral size up to millimetres and VO2 thickness down to 5 nm. The VO2-membranes were detached by dissolving a Sr3Al2O6 s"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2105.00154","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/2105.00154/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":"2026-07-05T02:36:34Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"jRixgKG9o/4MPxXP5nthN2V9GfTIx9T4TBHXLBZdzlQ5oZGbVc/gyLgegn1VOTDd+ATM/0VMOLjRyrHGPsOUDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-07T13:23:41.348647Z"},"content_sha256":"7fdff591585989d48df529d4aa12804c0cd6cf457cddc89d38013b94543a8ad2","schema_version":"1.0","event_id":"sha256:7fdff591585989d48df529d4aa12804c0cd6cf457cddc89d38013b94543a8ad2"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/GSGOCPFENL52F2QSCSLID4CO55/bundle.json","state_url":"https://pith.science/pith/GSGOCPFENL52F2QSCSLID4CO55/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/GSGOCPFENL52F2QSCSLID4CO55/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":"2026-07-07T13:23:41Z","links":{"resolver":"https://pith.science/pith/GSGOCPFENL52F2QSCSLID4CO55","bundle":"https://pith.science/pith/GSGOCPFENL52F2QSCSLID4CO55/bundle.json","state":"https://pith.science/pith/GSGOCPFENL52F2QSCSLID4CO55/state.json","well_known_bundle":"https://pith.science/.well-known/pith/GSGOCPFENL52F2QSCSLID4CO55/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2021:GSGOCPFENL52F2QSCSLID4CO55","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":"234d654d2941a8c2826427f5c3243997add4f106969448bc6e1ea8eed8991ba8","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2021-05-01T03:07:09Z","title_canon_sha256":"c309710532323799b6d7a5f924a563a1e9a159f8ef66c8870fe4d378054b1f30"},"schema_version":"1.0","source":{"id":"2105.00154","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2105.00154","created_at":"2026-07-05T02:36:34Z"},{"alias_kind":"arxiv_version","alias_value":"2105.00154v1","created_at":"2026-07-05T02:36:34Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2105.00154","created_at":"2026-07-05T02:36:34Z"},{"alias_kind":"pith_short_12","alias_value":"GSGOCPFENL52","created_at":"2026-07-05T02:36:34Z"},{"alias_kind":"pith_short_16","alias_value":"GSGOCPFENL52F2QS","created_at":"2026-07-05T02:36:34Z"},{"alias_kind":"pith_short_8","alias_value":"GSGOCPFE","created_at":"2026-07-05T02:36:34Z"}],"graph_snapshots":[{"event_id":"sha256:7fdff591585989d48df529d4aa12804c0cd6cf457cddc89d38013b94543a8ad2","target":"graph","created_at":"2026-07-05T02:36:34Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2105.00154/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Ultrathin freestanding membranes with a pronounced metal-insulator transition (MIT) provides huge potential in future flexible electronic applications as well as a unique aspect of the study of lattice-electron interplay. However, the reduction of the thickness to an ultrathin region (a few nm) is typically detrimental to the MIT in epitaxial films, and even catastrophic for their freestanding form. Here, we report an enhanced MIT in VO2-based freestanding membranes, with a lateral size up to millimetres and VO2 thickness down to 5 nm. The VO2-membranes were detached by dissolving a Sr3Al2O6 s","authors_text":"Chen Ye, Dong-Chen Qi, Hanyu Wang, Hongna Xing, Ke Huang, Kun Han, Liang Wu, M. Motapothula, Xiao Li, Xinghua Li, X. Renshaw Wang, Yu Cao","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2021-05-01T03:07:09Z","title":"Enhanced metal-insulator transition in freestanding VO2 down to 5 nm thickness"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2105.00154","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":"sha256:505c012557d1d5984a86a5f81699e0d3bc8f7b5c1c407415bf424deab20fce1f","target":"record","created_at":"2026-07-05T02:36:34Z","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":"234d654d2941a8c2826427f5c3243997add4f106969448bc6e1ea8eed8991ba8","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2021-05-01T03:07:09Z","title_canon_sha256":"c309710532323799b6d7a5f924a563a1e9a159f8ef66c8870fe4d378054b1f30"},"schema_version":"1.0","source":{"id":"2105.00154","kind":"arxiv","version":1}},"canonical_sha256":"348ce13ca46afba2ea12149681f04eef4913bdc0af5f3840f57547f656abf45c","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"348ce13ca46afba2ea12149681f04eef4913bdc0af5f3840f57547f656abf45c","first_computed_at":"2026-07-05T02:36:34.721229Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T02:36:34.721229Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"+9XsQkB1ZV50yTT/YFr9L2ha3pVdMPXeNLth1x45iLvGx5pLXojjW/kFTW8x+5iO+/A28RBaZEodsGmdzNucDw==","signature_status":"signed_v1","signed_at":"2026-07-05T02:36:34.721693Z","signed_message":"canonical_sha256_bytes"},"source_id":"2105.00154","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:505c012557d1d5984a86a5f81699e0d3bc8f7b5c1c407415bf424deab20fce1f","sha256:7fdff591585989d48df529d4aa12804c0cd6cf457cddc89d38013b94543a8ad2"],"state_sha256":"b67c1fc1522110ccf0e582eb46fe675f1d3562fbed183a97fcde21f4bac39080"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"GFUfLMVTtSQCrTFNwpq9ZoYqyEThVPknXyqI7iOxWRRedwRXdeJ1XDRKHh2BvfW2VHbXbSqIat3PjyUuE8J3Aw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-07T13:23:41.350634Z","bundle_sha256":"acf2e7d9ecec8e281119e8866e5514c9d0d2e31c2cdb97c0c009674a86cf3d85"}}