{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2014:SEQA7PWSYNCYXE5AVBJIFA6XWB","short_pith_number":"pith:SEQA7PWS","canonical_record":{"source":{"id":"1408.0730","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2014-08-04T16:07:06Z","cross_cats_sorted":[],"title_canon_sha256":"ba20d79a3f1d41bfbe2528049cb1bd798364b1eb26666f6c30e8ca6d9b7bd688","abstract_canon_sha256":"629ffaf4e957153e19b786c30b1a37c013739892ae979b2373186042efe41300"},"schema_version":"1.0"},"canonical_sha256":"91200fbed2c3458b93a0a8528283d7b044f32ae14e447e76d76072f930cae79c","source":{"kind":"arxiv","id":"1408.0730","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1408.0730","created_at":"2026-05-18T02:18:01Z"},{"alias_kind":"arxiv_version","alias_value":"1408.0730v1","created_at":"2026-05-18T02:18:01Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1408.0730","created_at":"2026-05-18T02:18:01Z"},{"alias_kind":"pith_short_12","alias_value":"SEQA7PWSYNCY","created_at":"2026-05-18T12:28:49Z"},{"alias_kind":"pith_short_16","alias_value":"SEQA7PWSYNCYXE5A","created_at":"2026-05-18T12:28:49Z"},{"alias_kind":"pith_short_8","alias_value":"SEQA7PWS","created_at":"2026-05-18T12:28:49Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2014:SEQA7PWSYNCYXE5AVBJIFA6XWB","target":"record","payload":{"canonical_record":{"source":{"id":"1408.0730","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2014-08-04T16:07:06Z","cross_cats_sorted":[],"title_canon_sha256":"ba20d79a3f1d41bfbe2528049cb1bd798364b1eb26666f6c30e8ca6d9b7bd688","abstract_canon_sha256":"629ffaf4e957153e19b786c30b1a37c013739892ae979b2373186042efe41300"},"schema_version":"1.0"},"canonical_sha256":"91200fbed2c3458b93a0a8528283d7b044f32ae14e447e76d76072f930cae79c","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:18:01.305184Z","signature_b64":"kQhbH3s2yfk5OjaO2Py5K82Mad+Lp1vx/r2NgmL6rxVkIemqflR4Yho4izJkJN7Vnzn+kVg9LKS0QPaPiCtjAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"91200fbed2c3458b93a0a8528283d7b044f32ae14e447e76d76072f930cae79c","last_reissued_at":"2026-05-18T02:18:01.304615Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:18:01.304615Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1408.0730","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":"2026-05-18T02:18:01Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"yP1G9efjK0km9UH06VAPuA1Iy6Hv+03IinA+ickt3FDw5n1hT6xatQmn1xY4HnZuWnuOmcuWlM81pEdyiYDoCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-21T22:27:42.001291Z"},"content_sha256":"bf7d6e802758eb1cd879f042ce108bf42813a8c0be559b1aa76f0b4859afc9cf","schema_version":"1.0","event_id":"sha256:bf7d6e802758eb1cd879f042ce108bf42813a8c0be559b1aa76f0b4859afc9cf"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2014:SEQA7PWSYNCYXE5AVBJIFA6XWB","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Density-dependent thermopower oscillations in mesoscopic two-dimensional electron gases","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mes-hall","authors_text":"Chris Ford, Dave Ritchie, Eugene Kogan, Geb Jones, Harvey Beere, Jonathan Griffiths, Michael Pepper, Moshe Kaveh, Vijay Narayan","submitted_at":"2014-08-04T16:07:06Z","abstract_excerpt":"We present thermopower $S$ and resistance $R$ measurements on GaAs-based mesoscopic two-dimensional electron gases (2DEGs) as functions of the electron density $n_s$. At high $n_s$ we observe good agreement between the measured $S$ and $S_{\\rm{MOTT}}$, the Mott prediction for a non-interacting metal. As $n_s$ is lowered, we observe a crossover from Mott-like behaviour to that where $S$ shows strong oscillations and even sign changes. Remarkably, there are absolutely no features in $R$ corresponding to those in $S$. In fact, $R$ is devoid of even any universal conductance fluctuations. A statis"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1408.0730","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":""},"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":"2026-05-18T02:18:01Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"38ILwr+HQypQpNoqXajMk70ADYO8E6cT69g8KlfKGHqbcQ3loZPI8KmCLbI431Qo1GpxrL39nH6QzuUsxjkzAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-21T22:27:42.001662Z"},"content_sha256":"ac69edfa4092b4c5d9c4777dabd418fe16ef869808d4a591d6db4d3ba929e57c","schema_version":"1.0","event_id":"sha256:ac69edfa4092b4c5d9c4777dabd418fe16ef869808d4a591d6db4d3ba929e57c"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/SEQA7PWSYNCYXE5AVBJIFA6XWB/bundle.json","state_url":"https://pith.science/pith/SEQA7PWSYNCYXE5AVBJIFA6XWB/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/SEQA7PWSYNCYXE5AVBJIFA6XWB/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":"2026-06-21T22:27:42Z","links":{"resolver":"https://pith.science/pith/SEQA7PWSYNCYXE5AVBJIFA6XWB","bundle":"https://pith.science/pith/SEQA7PWSYNCYXE5AVBJIFA6XWB/bundle.json","state":"https://pith.science/pith/SEQA7PWSYNCYXE5AVBJIFA6XWB/state.json","well_known_bundle":"https://pith.science/.well-known/pith/SEQA7PWSYNCYXE5AVBJIFA6XWB/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:SEQA7PWSYNCYXE5AVBJIFA6XWB","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":"629ffaf4e957153e19b786c30b1a37c013739892ae979b2373186042efe41300","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2014-08-04T16:07:06Z","title_canon_sha256":"ba20d79a3f1d41bfbe2528049cb1bd798364b1eb26666f6c30e8ca6d9b7bd688"},"schema_version":"1.0","source":{"id":"1408.0730","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1408.0730","created_at":"2026-05-18T02:18:01Z"},{"alias_kind":"arxiv_version","alias_value":"1408.0730v1","created_at":"2026-05-18T02:18:01Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1408.0730","created_at":"2026-05-18T02:18:01Z"},{"alias_kind":"pith_short_12","alias_value":"SEQA7PWSYNCY","created_at":"2026-05-18T12:28:49Z"},{"alias_kind":"pith_short_16","alias_value":"SEQA7PWSYNCYXE5A","created_at":"2026-05-18T12:28:49Z"},{"alias_kind":"pith_short_8","alias_value":"SEQA7PWS","created_at":"2026-05-18T12:28:49Z"}],"graph_snapshots":[{"event_id":"sha256:ac69edfa4092b4c5d9c4777dabd418fe16ef869808d4a591d6db4d3ba929e57c","target":"graph","created_at":"2026-05-18T02:18:01Z","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 present thermopower $S$ and resistance $R$ measurements on GaAs-based mesoscopic two-dimensional electron gases (2DEGs) as functions of the electron density $n_s$. At high $n_s$ we observe good agreement between the measured $S$ and $S_{\\rm{MOTT}}$, the Mott prediction for a non-interacting metal. As $n_s$ is lowered, we observe a crossover from Mott-like behaviour to that where $S$ shows strong oscillations and even sign changes. Remarkably, there are absolutely no features in $R$ corresponding to those in $S$. In fact, $R$ is devoid of even any universal conductance fluctuations. A statis","authors_text":"Chris Ford, Dave Ritchie, Eugene Kogan, Geb Jones, Harvey Beere, Jonathan Griffiths, Michael Pepper, Moshe Kaveh, Vijay Narayan","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2014-08-04T16:07:06Z","title":"Density-dependent thermopower oscillations in mesoscopic two-dimensional electron gases"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1408.0730","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:bf7d6e802758eb1cd879f042ce108bf42813a8c0be559b1aa76f0b4859afc9cf","target":"record","created_at":"2026-05-18T02:18:01Z","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":"629ffaf4e957153e19b786c30b1a37c013739892ae979b2373186042efe41300","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2014-08-04T16:07:06Z","title_canon_sha256":"ba20d79a3f1d41bfbe2528049cb1bd798364b1eb26666f6c30e8ca6d9b7bd688"},"schema_version":"1.0","source":{"id":"1408.0730","kind":"arxiv","version":1}},"canonical_sha256":"91200fbed2c3458b93a0a8528283d7b044f32ae14e447e76d76072f930cae79c","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"91200fbed2c3458b93a0a8528283d7b044f32ae14e447e76d76072f930cae79c","first_computed_at":"2026-05-18T02:18:01.304615Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:18:01.304615Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"kQhbH3s2yfk5OjaO2Py5K82Mad+Lp1vx/r2NgmL6rxVkIemqflR4Yho4izJkJN7Vnzn+kVg9LKS0QPaPiCtjAQ==","signature_status":"signed_v1","signed_at":"2026-05-18T02:18:01.305184Z","signed_message":"canonical_sha256_bytes"},"source_id":"1408.0730","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:bf7d6e802758eb1cd879f042ce108bf42813a8c0be559b1aa76f0b4859afc9cf","sha256:ac69edfa4092b4c5d9c4777dabd418fe16ef869808d4a591d6db4d3ba929e57c"],"state_sha256":"70067eb7eca0de686f3b97358ebef62f5bfff485e65638beb9499fdfe7bcbe3b"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"feDbngoG/zI4w5JSGri544JpMNVGOB+y2QwJwkrsQUbajdKjF99WhbALA4QZ4iZXgP5aXJ8ncnhmpPWUKLElAA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-21T22:27:42.003622Z","bundle_sha256":"879f2dc9aa1bfa80f9d36fed0b73e7fe32faded655a0655dfb98276e28697f8f"}}