{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2016:WQILTDU4OPPKIH32NRKAJH7567","short_pith_number":"pith:WQILTDU4","schema_version":"1.0","canonical_sha256":"b410b98e9c73dea41f7a6c54049ffdf7e29fc651980b2359f284f219adf18a02","source":{"kind":"arxiv","id":"1607.01463","version":1},"attestation_state":"computed","paper":{"title":"Signatures of an annular Fermi sea","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mes-hall","authors_text":"Insun Jo, K. W. Baldwin, K. W. West, L. N. Pfeiffer, M. Shayegan, R. Winkler, Yang Liu","submitted_at":"2016-07-06T02:36:20Z","abstract_excerpt":"We report Shubnikov-de Haas oscillations measurements revealing experimental signatures of an annular Fermi sea that develops near the energy band edge of the excited subband of two-dimensional holes confined in a wide GaAs quantum well. As we increase the hole density, when the Fermi level reaches the excited subband edge, the low-field magnetoresistance traces show a sudden emergence of new oscillations at an unexpectedly large frequency whose value does $\\textit{not}$ correspond to the (negligible) density of holes in the excited subband. There is also a sharp and significant increase in ze"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"1607.01463","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2016-07-06T02:36:20Z","cross_cats_sorted":[],"title_canon_sha256":"21320af0d90dc08ea09cf01cfe67f204e4ff14a5741913ee66d2588f4263bde8","abstract_canon_sha256":"298335f803ea6e5252c0fc647170d46218d4a6c451110922be29558e2d28b9fc"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:53:15.591735Z","signature_b64":"Zd2FCqvpsV7XtXbgsq7cNadeo53f6zyh9ubfDhiuq4XHok+O86qZpcEKt9g0XdsiMnIDlrvPlDb+gburJhByDA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"b410b98e9c73dea41f7a6c54049ffdf7e29fc651980b2359f284f219adf18a02","last_reissued_at":"2026-05-18T00:53:15.591235Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:53:15.591235Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Signatures of an annular Fermi sea","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mes-hall","authors_text":"Insun Jo, K. W. Baldwin, K. W. West, L. N. Pfeiffer, M. Shayegan, R. Winkler, Yang Liu","submitted_at":"2016-07-06T02:36:20Z","abstract_excerpt":"We report Shubnikov-de Haas oscillations measurements revealing experimental signatures of an annular Fermi sea that develops near the energy band edge of the excited subband of two-dimensional holes confined in a wide GaAs quantum well. As we increase the hole density, when the Fermi level reaches the excited subband edge, the low-field magnetoresistance traces show a sudden emergence of new oscillations at an unexpectedly large frequency whose value does $\\textit{not}$ correspond to the (negligible) density of holes in the excited subband. There is also a sharp and significant increase in ze"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1607.01463","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"},"aliases":[{"alias_kind":"arxiv","alias_value":"1607.01463","created_at":"2026-05-18T00:53:15.591330+00:00"},{"alias_kind":"arxiv_version","alias_value":"1607.01463v1","created_at":"2026-05-18T00:53:15.591330+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1607.01463","created_at":"2026-05-18T00:53:15.591330+00:00"},{"alias_kind":"pith_short_12","alias_value":"WQILTDU4OPPK","created_at":"2026-05-18T12:30:51.357362+00:00"},{"alias_kind":"pith_short_16","alias_value":"WQILTDU4OPPKIH32","created_at":"2026-05-18T12:30:51.357362+00:00"},{"alias_kind":"pith_short_8","alias_value":"WQILTDU4","created_at":"2026-05-18T12:30:51.357362+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/WQILTDU4OPPKIH32NRKAJH7567","json":"https://pith.science/pith/WQILTDU4OPPKIH32NRKAJH7567.json","graph_json":"https://pith.science/api/pith-number/WQILTDU4OPPKIH32NRKAJH7567/graph.json","events_json":"https://pith.science/api/pith-number/WQILTDU4OPPKIH32NRKAJH7567/events.json","paper":"https://pith.science/paper/WQILTDU4"},"agent_actions":{"view_html":"https://pith.science/pith/WQILTDU4OPPKIH32NRKAJH7567","download_json":"https://pith.science/pith/WQILTDU4OPPKIH32NRKAJH7567.json","view_paper":"https://pith.science/paper/WQILTDU4","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1607.01463&json=true","fetch_graph":"https://pith.science/api/pith-number/WQILTDU4OPPKIH32NRKAJH7567/graph.json","fetch_events":"https://pith.science/api/pith-number/WQILTDU4OPPKIH32NRKAJH7567/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/WQILTDU4OPPKIH32NRKAJH7567/action/timestamp_anchor","attest_storage":"https://pith.science/pith/WQILTDU4OPPKIH32NRKAJH7567/action/storage_attestation","attest_author":"https://pith.science/pith/WQILTDU4OPPKIH32NRKAJH7567/action/author_attestation","sign_citation":"https://pith.science/pith/WQILTDU4OPPKIH32NRKAJH7567/action/citation_signature","submit_replication":"https://pith.science/pith/WQILTDU4OPPKIH32NRKAJH7567/action/replication_record"}},"created_at":"2026-05-18T00:53:15.591330+00:00","updated_at":"2026-05-18T00:53:15.591330+00:00"}