{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2014:URZYWWZXZTQBWEPBKFDMLBFNAY","short_pith_number":"pith:URZYWWZX","canonical_record":{"source":{"id":"1407.7541","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2014-07-28T20:00:45Z","cross_cats_sorted":[],"title_canon_sha256":"9dc865e584e4cdd8948cdcf60d9a2c8fd248ed73d6a49227d804baf98be5b737","abstract_canon_sha256":"b52fe4201717abde8998d2b3d4596bc33ed54e9873429ff6158e94f6c6016438"},"schema_version":"1.0"},"canonical_sha256":"a4738b5b37cce01b11e15146c584ad061b6dbd3c3a8364609a84012444b5f3ef","source":{"kind":"arxiv","id":"1407.7541","version":3},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1407.7541","created_at":"2026-05-18T02:40:10Z"},{"alias_kind":"arxiv_version","alias_value":"1407.7541v3","created_at":"2026-05-18T02:40:10Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1407.7541","created_at":"2026-05-18T02:40:10Z"},{"alias_kind":"pith_short_12","alias_value":"URZYWWZXZTQB","created_at":"2026-05-18T12:28:52Z"},{"alias_kind":"pith_short_16","alias_value":"URZYWWZXZTQBWEPB","created_at":"2026-05-18T12:28:52Z"},{"alias_kind":"pith_short_8","alias_value":"URZYWWZX","created_at":"2026-05-18T12:28:52Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2014:URZYWWZXZTQBWEPBKFDMLBFNAY","target":"record","payload":{"canonical_record":{"source":{"id":"1407.7541","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2014-07-28T20:00:45Z","cross_cats_sorted":[],"title_canon_sha256":"9dc865e584e4cdd8948cdcf60d9a2c8fd248ed73d6a49227d804baf98be5b737","abstract_canon_sha256":"b52fe4201717abde8998d2b3d4596bc33ed54e9873429ff6158e94f6c6016438"},"schema_version":"1.0"},"canonical_sha256":"a4738b5b37cce01b11e15146c584ad061b6dbd3c3a8364609a84012444b5f3ef","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:40:10.034555Z","signature_b64":"oXwMP3u6c+Z5yD+Vqggy2eLbdsxLwF3+y6fPE4/SOwOzTSSwQ0iH4y/5JwtXUpbNmhEPxbPy+YbhWgfIkWEcCQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"a4738b5b37cce01b11e15146c584ad061b6dbd3c3a8364609a84012444b5f3ef","last_reissued_at":"2026-05-18T02:40:10.034176Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:40:10.034176Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1407.7541","source_version":3,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T02:40:10Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"9o4ezBZYObLIWVVkQ3Ilk+9msDYbYLPF7cJu34EweZVGn+pBhuotARGbORgt2Y3J6E0KMPc5oGgk1kNC3LutAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-01T22:18:40.647362Z"},"content_sha256":"dc357421592ac6be7337e8c19f7c8fdd341cf79a48c114e77ec24b797a05cbd4","schema_version":"1.0","event_id":"sha256:dc357421592ac6be7337e8c19f7c8fdd341cf79a48c114e77ec24b797a05cbd4"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2014:URZYWWZXZTQBWEPBKFDMLBFNAY","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"An apparent metal insulator transition in high mobility 2D InAs heterostructures","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mes-hall","authors_text":"C. J. palmstr{\\o}m, J. Shabani, S. Das Sarma","submitted_at":"2014-07-28T20:00:45Z","abstract_excerpt":"We report on the first experimental observation of an apparent metal insulator transition in a 2D electron gas confined in an InAs quantum well. At high densities we find that the carrier mobility is limited by background charged impurities and the temperature dependence of the resistivity shows a metallic behavior with resistivity increasing with increasing temperature. At low densities we find an insulating behavior below a critical density of $n_{c} = 5 \\times 10^{10}$ cm$^{-2}$ with the resistivity decreasing with increasing temperature. We analyze this transition using a percolation model"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1407.7541","kind":"arxiv","version":3},"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":"2026-05-18T02:40:10Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"d/434SFNvF8dd4XMIk3z63vemRia6rWNJLme4oU5QczMDvvUZriEjpWqLlGd68kdh15j46wNGf9LgM4r7S5LBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-01T22:18:40.647693Z"},"content_sha256":"ae603940b7ce46002b5589f8a9afdff97e37b2858d56ea27201d74751780d64a","schema_version":"1.0","event_id":"sha256:ae603940b7ce46002b5589f8a9afdff97e37b2858d56ea27201d74751780d64a"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/URZYWWZXZTQBWEPBKFDMLBFNAY/bundle.json","state_url":"https://pith.science/pith/URZYWWZXZTQBWEPBKFDMLBFNAY/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/URZYWWZXZTQBWEPBKFDMLBFNAY/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":"2026-06-01T22:18:40Z","links":{"resolver":"https://pith.science/pith/URZYWWZXZTQBWEPBKFDMLBFNAY","bundle":"https://pith.science/pith/URZYWWZXZTQBWEPBKFDMLBFNAY/bundle.json","state":"https://pith.science/pith/URZYWWZXZTQBWEPBKFDMLBFNAY/state.json","well_known_bundle":"https://pith.science/.well-known/pith/URZYWWZXZTQBWEPBKFDMLBFNAY/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:URZYWWZXZTQBWEPBKFDMLBFNAY","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":"b52fe4201717abde8998d2b3d4596bc33ed54e9873429ff6158e94f6c6016438","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2014-07-28T20:00:45Z","title_canon_sha256":"9dc865e584e4cdd8948cdcf60d9a2c8fd248ed73d6a49227d804baf98be5b737"},"schema_version":"1.0","source":{"id":"1407.7541","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1407.7541","created_at":"2026-05-18T02:40:10Z"},{"alias_kind":"arxiv_version","alias_value":"1407.7541v3","created_at":"2026-05-18T02:40:10Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1407.7541","created_at":"2026-05-18T02:40:10Z"},{"alias_kind":"pith_short_12","alias_value":"URZYWWZXZTQB","created_at":"2026-05-18T12:28:52Z"},{"alias_kind":"pith_short_16","alias_value":"URZYWWZXZTQBWEPB","created_at":"2026-05-18T12:28:52Z"},{"alias_kind":"pith_short_8","alias_value":"URZYWWZX","created_at":"2026-05-18T12:28:52Z"}],"graph_snapshots":[{"event_id":"sha256:ae603940b7ce46002b5589f8a9afdff97e37b2858d56ea27201d74751780d64a","target":"graph","created_at":"2026-05-18T02:40:10Z","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 report on the first experimental observation of an apparent metal insulator transition in a 2D electron gas confined in an InAs quantum well. At high densities we find that the carrier mobility is limited by background charged impurities and the temperature dependence of the resistivity shows a metallic behavior with resistivity increasing with increasing temperature. At low densities we find an insulating behavior below a critical density of $n_{c} = 5 \\times 10^{10}$ cm$^{-2}$ with the resistivity decreasing with increasing temperature. We analyze this transition using a percolation model","authors_text":"C. J. palmstr{\\o}m, J. Shabani, S. Das Sarma","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2014-07-28T20:00:45Z","title":"An apparent metal insulator transition in high mobility 2D InAs heterostructures"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1407.7541","kind":"arxiv","version":3},"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:dc357421592ac6be7337e8c19f7c8fdd341cf79a48c114e77ec24b797a05cbd4","target":"record","created_at":"2026-05-18T02:40:10Z","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":"b52fe4201717abde8998d2b3d4596bc33ed54e9873429ff6158e94f6c6016438","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2014-07-28T20:00:45Z","title_canon_sha256":"9dc865e584e4cdd8948cdcf60d9a2c8fd248ed73d6a49227d804baf98be5b737"},"schema_version":"1.0","source":{"id":"1407.7541","kind":"arxiv","version":3}},"canonical_sha256":"a4738b5b37cce01b11e15146c584ad061b6dbd3c3a8364609a84012444b5f3ef","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"a4738b5b37cce01b11e15146c584ad061b6dbd3c3a8364609a84012444b5f3ef","first_computed_at":"2026-05-18T02:40:10.034176Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:40:10.034176Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"oXwMP3u6c+Z5yD+Vqggy2eLbdsxLwF3+y6fPE4/SOwOzTSSwQ0iH4y/5JwtXUpbNmhEPxbPy+YbhWgfIkWEcCQ==","signature_status":"signed_v1","signed_at":"2026-05-18T02:40:10.034555Z","signed_message":"canonical_sha256_bytes"},"source_id":"1407.7541","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:dc357421592ac6be7337e8c19f7c8fdd341cf79a48c114e77ec24b797a05cbd4","sha256:ae603940b7ce46002b5589f8a9afdff97e37b2858d56ea27201d74751780d64a"],"state_sha256":"5b4e065487dabc5b98e25c98cd30cc132c20c46903ca9785f442e674a5abcafe"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"zzvSzbwv+Xk1Ddn32whPvIQOWRS65XUSavzEcGV/1VZ6CHqLkNpEWptfjC4bfxruWUNqw37uIP1vzz8yMco1AQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-01T22:18:40.649485Z","bundle_sha256":"e0dc5d23170462d3c9aa972f30deb5659634612e986290d515623f01ca2eb155"}}