{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:XZX6Z7ZFNJYJP464UXXYCBPWGI","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":"cae6b200fa577138e2b5cd04b71e0bc1d48f62472de9913ff206345384a635ef","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2013-06-27T21:46:49Z","title_canon_sha256":"b97b95f4bb737ef95c6bc6a18164a8dad9254e95ac6b9abc91d4e4803ad9447c"},"schema_version":"1.0","source":{"id":"1306.6666","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1306.6666","created_at":"2026-05-18T03:19:43Z"},{"alias_kind":"arxiv_version","alias_value":"1306.6666v1","created_at":"2026-05-18T03:19:43Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1306.6666","created_at":"2026-05-18T03:19:43Z"},{"alias_kind":"pith_short_12","alias_value":"XZX6Z7ZFNJYJ","created_at":"2026-05-18T12:28:06Z"},{"alias_kind":"pith_short_16","alias_value":"XZX6Z7ZFNJYJP464","created_at":"2026-05-18T12:28:06Z"},{"alias_kind":"pith_short_8","alias_value":"XZX6Z7ZF","created_at":"2026-05-18T12:28:06Z"}],"graph_snapshots":[{"event_id":"sha256:e68e3fb1f42aeea376039266c8667d796cc46a98792cc7585f862ca950bb6590","target":"graph","created_at":"2026-05-18T03:19:43Z","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":"High quality strongly correlated two-dimensional (2D) electron systems at low temperatures $T\\rightarrow 0$ exhibits an apparent metal-to-insulator transition (MIT) at a large $r_s$ value around 40. We have measured the magnetoresistance of 2D holes in weak perpendicular magnetic field in the vicinity of the transition for a series of carrier densities ranging from $0.2-1.5\\times10^{10}$ $cm^{-2}$. The sign of the magnetoresistance is found to be charge density dependent: in the direction of decreasing density, the sign changes from being positive to negative across a characteristic value that","authors_text":"Jian Huang, K.W. West, L.N. Pfeiffer","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2013-06-27T21:46:49Z","title":"Characteristic Sign Change of the Magnetoresistance of Strongly Correlated GaAs Two-dimensional Holes"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1306.6666","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:fc0e3c6510bf24ba0ac9c1deb46f23212ad5abdb22790f95e94c5594b649cfe0","target":"record","created_at":"2026-05-18T03:19:43Z","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":"cae6b200fa577138e2b5cd04b71e0bc1d48f62472de9913ff206345384a635ef","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2013-06-27T21:46:49Z","title_canon_sha256":"b97b95f4bb737ef95c6bc6a18164a8dad9254e95ac6b9abc91d4e4803ad9447c"},"schema_version":"1.0","source":{"id":"1306.6666","kind":"arxiv","version":1}},"canonical_sha256":"be6fecff256a7097f3dca5ef8105f63213821ec482962ac5bbeb3374a6613b28","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"be6fecff256a7097f3dca5ef8105f63213821ec482962ac5bbeb3374a6613b28","first_computed_at":"2026-05-18T03:19:43.463015Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:19:43.463015Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"vuIMTuC3Zek+ZrbtRLlB6B+vSVZOn7FdLYXJ8MMRXeg2wLjMtKbQeVZKcJwU1ObjWQDntkvu5sLdeMS/lT8wBA==","signature_status":"signed_v1","signed_at":"2026-05-18T03:19:43.463779Z","signed_message":"canonical_sha256_bytes"},"source_id":"1306.6666","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:fc0e3c6510bf24ba0ac9c1deb46f23212ad5abdb22790f95e94c5594b649cfe0","sha256:e68e3fb1f42aeea376039266c8667d796cc46a98792cc7585f862ca950bb6590"],"state_sha256":"83f7be08b9e9a72c4897e900769a8f9ca10d33aa87aab5f23f1f85075cced7b2"}