{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2012:TVV2E6VRGARZGQETZS4SHGLVBB","short_pith_number":"pith:TVV2E6VR","schema_version":"1.0","canonical_sha256":"9d6ba27ab13023934093ccb92399750846b4371811d94aee7f04578ef486ff61","source":{"kind":"arxiv","id":"1202.4029","version":1},"attestation_state":"computed","paper":{"title":"Landau level spectroscopy of surface states in the topological insulator Bi$_{0.91}$Sb$_{0.09}$ via magneto-optics","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mes-hall","authors_text":"A.A. Schafgans, A.A. Taskin, B.C. Chapler, D.N. Basov, K.W. Post, Xiao-Liang Qi, Yoichi Ando","submitted_at":"2012-02-17T22:24:44Z","abstract_excerpt":"We have performed broad-band zero-field and magneto-infrared spectroscopy of the three dimensional topological insulator Bi$_{0.91}$Sb$_{0.09}$. The zero-field results allow us to measure the value of the direct band gap between the conducting $L_a$ and valence $L_s$ bands. Under applied field in the Faraday geometry (\\emph{k} $||$ \\emph{H} $||$ C1), we measured the presence of a multitude of Landau level (LL) transitions, all with frequency dependence $\\omega \\propto \\sqrt{H}$. We discuss the ramification of this observation for the surface and bulk properties of topological insulators."},"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":"1202.4029","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2012-02-17T22:24:44Z","cross_cats_sorted":[],"title_canon_sha256":"111166d5e6169c755b294e41be423b130746dcf01873e0eda551354f31be0ed3","abstract_canon_sha256":"df0ee657061b5fa36d5b4a5bd0d833d310bd982d1ea7dbd9de7c5251c10427cf"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:58:23.965472Z","signature_b64":"2NlaEmQcaJdNAO1HLWO/w7oIJtg4xyUCm68uJoyllJR/Ds37MQZFZm2zVmhS8vMbopH7gNwhbqtTmwc0SWE+BA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"9d6ba27ab13023934093ccb92399750846b4371811d94aee7f04578ef486ff61","last_reissued_at":"2026-05-18T01:58:23.964848Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:58:23.964848Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Landau level spectroscopy of surface states in the topological insulator Bi$_{0.91}$Sb$_{0.09}$ via magneto-optics","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mes-hall","authors_text":"A.A. Schafgans, A.A. Taskin, B.C. Chapler, D.N. Basov, K.W. Post, Xiao-Liang Qi, Yoichi Ando","submitted_at":"2012-02-17T22:24:44Z","abstract_excerpt":"We have performed broad-band zero-field and magneto-infrared spectroscopy of the three dimensional topological insulator Bi$_{0.91}$Sb$_{0.09}$. The zero-field results allow us to measure the value of the direct band gap between the conducting $L_a$ and valence $L_s$ bands. Under applied field in the Faraday geometry (\\emph{k} $||$ \\emph{H} $||$ C1), we measured the presence of a multitude of Landau level (LL) transitions, all with frequency dependence $\\omega \\propto \\sqrt{H}$. We discuss the ramification of this observation for the surface and bulk properties of topological insulators."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1202.4029","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":"1202.4029","created_at":"2026-05-18T01:58:23.964937+00:00"},{"alias_kind":"arxiv_version","alias_value":"1202.4029v1","created_at":"2026-05-18T01:58:23.964937+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1202.4029","created_at":"2026-05-18T01:58:23.964937+00:00"},{"alias_kind":"pith_short_12","alias_value":"TVV2E6VRGARZ","created_at":"2026-05-18T12:27:23.164592+00:00"},{"alias_kind":"pith_short_16","alias_value":"TVV2E6VRGARZGQET","created_at":"2026-05-18T12:27:23.164592+00:00"},{"alias_kind":"pith_short_8","alias_value":"TVV2E6VR","created_at":"2026-05-18T12:27:23.164592+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/TVV2E6VRGARZGQETZS4SHGLVBB","json":"https://pith.science/pith/TVV2E6VRGARZGQETZS4SHGLVBB.json","graph_json":"https://pith.science/api/pith-number/TVV2E6VRGARZGQETZS4SHGLVBB/graph.json","events_json":"https://pith.science/api/pith-number/TVV2E6VRGARZGQETZS4SHGLVBB/events.json","paper":"https://pith.science/paper/TVV2E6VR"},"agent_actions":{"view_html":"https://pith.science/pith/TVV2E6VRGARZGQETZS4SHGLVBB","download_json":"https://pith.science/pith/TVV2E6VRGARZGQETZS4SHGLVBB.json","view_paper":"https://pith.science/paper/TVV2E6VR","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1202.4029&json=true","fetch_graph":"https://pith.science/api/pith-number/TVV2E6VRGARZGQETZS4SHGLVBB/graph.json","fetch_events":"https://pith.science/api/pith-number/TVV2E6VRGARZGQETZS4SHGLVBB/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/TVV2E6VRGARZGQETZS4SHGLVBB/action/timestamp_anchor","attest_storage":"https://pith.science/pith/TVV2E6VRGARZGQETZS4SHGLVBB/action/storage_attestation","attest_author":"https://pith.science/pith/TVV2E6VRGARZGQETZS4SHGLVBB/action/author_attestation","sign_citation":"https://pith.science/pith/TVV2E6VRGARZGQETZS4SHGLVBB/action/citation_signature","submit_replication":"https://pith.science/pith/TVV2E6VRGARZGQETZS4SHGLVBB/action/replication_record"}},"created_at":"2026-05-18T01:58:23.964937+00:00","updated_at":"2026-05-18T01:58:23.964937+00:00"}