{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2022:I7BR5ZJNJRYREXPHMG3MMODUP4","short_pith_number":"pith:I7BR5ZJN","schema_version":"1.0","canonical_sha256":"47c31ee52d4c71125de761b6c638747f0fd61d077b91f3f37fdd604d27f39eeb","source":{"kind":"arxiv","id":"2204.09525","version":1},"attestation_state":"computed","paper":{"title":"Tunable and giant valley-selective Hall effect in gapped bilayer graphene","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mes-hall","authors_text":"Cheng Tan, David Barcons-Ruiz, Frank H. L. Koppens, Iacopo Torre, James Hone, Jianbo Yin, Justin C. W. Song, Kenji Watanabe, Takashi Taniguchi","submitted_at":"2022-04-20T15:02:39Z","abstract_excerpt":"Berry curvature is analogous to magnetic field but in momentum space and is commonly present in materials with non-trivial quantum geometry. It endows Bloch electrons with transverse anomalous velocities to produce Hall-like currents even in the absence of a magnetic field. We report the direct observation of in situ tunable valley-selective Hall effect (VSHE), where inversion symmetry, and thus the geometric phase of electrons, is controllable by an out-of-plane electric field. We use high-quality bilayer graphene with an intrinsic and tunable bandgap, illuminated by circularly polarized mid-"},"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":"2204.09525","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2022-04-20T15:02:39Z","cross_cats_sorted":[],"title_canon_sha256":"eb1ad25ce3a9cc6f9d71f8a756449b56be64b3f708d925c94a38c185bfdff0a7","abstract_canon_sha256":"75e540af748d3190a5427b550bc79b981bf0dbd12fe9e51b2f351ae6ffda328e"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T04:16:41.875374Z","signature_b64":"kVOC90gisOLOgZVOqNr1ntKrWzvWef983+e4f1f2ViPLhKwab/IUat8s77r/+/KFYhYqRsGYo/3HYhCwsenmCw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"47c31ee52d4c71125de761b6c638747f0fd61d077b91f3f37fdd604d27f39eeb","last_reissued_at":"2026-07-05T04:16:41.874984Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T04:16:41.874984Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Tunable and giant valley-selective Hall effect in gapped bilayer graphene","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mes-hall","authors_text":"Cheng Tan, David Barcons-Ruiz, Frank H. L. Koppens, Iacopo Torre, James Hone, Jianbo Yin, Justin C. W. Song, Kenji Watanabe, Takashi Taniguchi","submitted_at":"2022-04-20T15:02:39Z","abstract_excerpt":"Berry curvature is analogous to magnetic field but in momentum space and is commonly present in materials with non-trivial quantum geometry. It endows Bloch electrons with transverse anomalous velocities to produce Hall-like currents even in the absence of a magnetic field. We report the direct observation of in situ tunable valley-selective Hall effect (VSHE), where inversion symmetry, and thus the geometric phase of electrons, is controllable by an out-of-plane electric field. We use high-quality bilayer graphene with an intrinsic and tunable bandgap, illuminated by circularly polarized mid-"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2204.09525","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2204.09525/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2204.09525","created_at":"2026-07-05T04:16:41.875038+00:00"},{"alias_kind":"arxiv_version","alias_value":"2204.09525v1","created_at":"2026-07-05T04:16:41.875038+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2204.09525","created_at":"2026-07-05T04:16:41.875038+00:00"},{"alias_kind":"pith_short_12","alias_value":"I7BR5ZJNJRYR","created_at":"2026-07-05T04:16:41.875038+00:00"},{"alias_kind":"pith_short_16","alias_value":"I7BR5ZJNJRYREXPH","created_at":"2026-07-05T04:16:41.875038+00:00"},{"alias_kind":"pith_short_8","alias_value":"I7BR5ZJN","created_at":"2026-07-05T04:16:41.875038+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/I7BR5ZJNJRYREXPHMG3MMODUP4","json":"https://pith.science/pith/I7BR5ZJNJRYREXPHMG3MMODUP4.json","graph_json":"https://pith.science/api/pith-number/I7BR5ZJNJRYREXPHMG3MMODUP4/graph.json","events_json":"https://pith.science/api/pith-number/I7BR5ZJNJRYREXPHMG3MMODUP4/events.json","paper":"https://pith.science/paper/I7BR5ZJN"},"agent_actions":{"view_html":"https://pith.science/pith/I7BR5ZJNJRYREXPHMG3MMODUP4","download_json":"https://pith.science/pith/I7BR5ZJNJRYREXPHMG3MMODUP4.json","view_paper":"https://pith.science/paper/I7BR5ZJN","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=2204.09525&json=true","fetch_graph":"https://pith.science/api/pith-number/I7BR5ZJNJRYREXPHMG3MMODUP4/graph.json","fetch_events":"https://pith.science/api/pith-number/I7BR5ZJNJRYREXPHMG3MMODUP4/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/I7BR5ZJNJRYREXPHMG3MMODUP4/action/timestamp_anchor","attest_storage":"https://pith.science/pith/I7BR5ZJNJRYREXPHMG3MMODUP4/action/storage_attestation","attest_author":"https://pith.science/pith/I7BR5ZJNJRYREXPHMG3MMODUP4/action/author_attestation","sign_citation":"https://pith.science/pith/I7BR5ZJNJRYREXPHMG3MMODUP4/action/citation_signature","submit_replication":"https://pith.science/pith/I7BR5ZJNJRYREXPHMG3MMODUP4/action/replication_record"}},"created_at":"2026-07-05T04:16:41.875038+00:00","updated_at":"2026-07-05T04:16:41.875038+00:00"}