{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2011:23Y7UYDJBG4H2PUZCBU2FPQJVP","short_pith_number":"pith:23Y7UYDJ","schema_version":"1.0","canonical_sha256":"d6f1fa606909b87d3e991069a2be09abd4fedb01765dc4e8466dbb3f87eb34c5","source":{"kind":"arxiv","id":"1103.1663","version":2},"attestation_state":"computed","paper":{"title":"Electron-electron interaction and electron-hole asymmetry in bilayer graphene","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.mes-hall"],"primary_cat":"cond-mat.str-el","authors_text":"J. Zhu, K. Zou, X. Hong","submitted_at":"2011-03-08T23:05:31Z","abstract_excerpt":"We report precision measurements of the effective mass m* in high-quality bilayer graphene using the temperature dependence of the Shubnikov-de Haas oscillations. In the density range of 0.7 x 10^12/cm^2 < n < 4.1 x 10^12 /cm^2, both the hole mass m*_h and the electron mass m*_e increase with increasing density, demonstrating the hyperbolic nature of the bands. The hole mass m*_h is approximately 20-30% larger than the electron mass m*_e. Tight-binding calculations provide a good description of the electron-hole asymmetry and yield an accurate measure of the inter-layer hopping parameter v_4 ="},"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":"1103.1663","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2011-03-08T23:05:31Z","cross_cats_sorted":["cond-mat.mes-hall"],"title_canon_sha256":"7f99e11b607e966c3746f0b7fdf64e4d0dbbef5b06a3664661348fbe47e48102","abstract_canon_sha256":"b0735dcf79b5dac923248da64b3f496351196a39eb9ec3ec5a91ad0ffb0522dd"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:14:55.025481Z","signature_b64":"dW1Oa95L9kCAFX0p0L4cooOtBi+w5SFWSKIjSP8cHv73hsKHl3td2dghXPREkudAhdaxP7uPny+LZ5jP1KlSCA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"d6f1fa606909b87d3e991069a2be09abd4fedb01765dc4e8466dbb3f87eb34c5","last_reissued_at":"2026-05-18T04:14:55.024744Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:14:55.024744Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Electron-electron interaction and electron-hole asymmetry in bilayer graphene","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.mes-hall"],"primary_cat":"cond-mat.str-el","authors_text":"J. Zhu, K. Zou, X. Hong","submitted_at":"2011-03-08T23:05:31Z","abstract_excerpt":"We report precision measurements of the effective mass m* in high-quality bilayer graphene using the temperature dependence of the Shubnikov-de Haas oscillations. In the density range of 0.7 x 10^12/cm^2 < n < 4.1 x 10^12 /cm^2, both the hole mass m*_h and the electron mass m*_e increase with increasing density, demonstrating the hyperbolic nature of the bands. The hole mass m*_h is approximately 20-30% larger than the electron mass m*_e. Tight-binding calculations provide a good description of the electron-hole asymmetry and yield an accurate measure of the inter-layer hopping parameter v_4 ="},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1103.1663","kind":"arxiv","version":2},"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":"1103.1663","created_at":"2026-05-18T04:14:55.024874+00:00"},{"alias_kind":"arxiv_version","alias_value":"1103.1663v2","created_at":"2026-05-18T04:14:55.024874+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1103.1663","created_at":"2026-05-18T04:14:55.024874+00:00"},{"alias_kind":"pith_short_12","alias_value":"23Y7UYDJBG4H","created_at":"2026-05-18T12:26:18.847500+00:00"},{"alias_kind":"pith_short_16","alias_value":"23Y7UYDJBG4H2PUZ","created_at":"2026-05-18T12:26:18.847500+00:00"},{"alias_kind":"pith_short_8","alias_value":"23Y7UYDJ","created_at":"2026-05-18T12:26:18.847500+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/23Y7UYDJBG4H2PUZCBU2FPQJVP","json":"https://pith.science/pith/23Y7UYDJBG4H2PUZCBU2FPQJVP.json","graph_json":"https://pith.science/api/pith-number/23Y7UYDJBG4H2PUZCBU2FPQJVP/graph.json","events_json":"https://pith.science/api/pith-number/23Y7UYDJBG4H2PUZCBU2FPQJVP/events.json","paper":"https://pith.science/paper/23Y7UYDJ"},"agent_actions":{"view_html":"https://pith.science/pith/23Y7UYDJBG4H2PUZCBU2FPQJVP","download_json":"https://pith.science/pith/23Y7UYDJBG4H2PUZCBU2FPQJVP.json","view_paper":"https://pith.science/paper/23Y7UYDJ","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1103.1663&json=true","fetch_graph":"https://pith.science/api/pith-number/23Y7UYDJBG4H2PUZCBU2FPQJVP/graph.json","fetch_events":"https://pith.science/api/pith-number/23Y7UYDJBG4H2PUZCBU2FPQJVP/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/23Y7UYDJBG4H2PUZCBU2FPQJVP/action/timestamp_anchor","attest_storage":"https://pith.science/pith/23Y7UYDJBG4H2PUZCBU2FPQJVP/action/storage_attestation","attest_author":"https://pith.science/pith/23Y7UYDJBG4H2PUZCBU2FPQJVP/action/author_attestation","sign_citation":"https://pith.science/pith/23Y7UYDJBG4H2PUZCBU2FPQJVP/action/citation_signature","submit_replication":"https://pith.science/pith/23Y7UYDJBG4H2PUZCBU2FPQJVP/action/replication_record"}},"created_at":"2026-05-18T04:14:55.024874+00:00","updated_at":"2026-05-18T04:14:55.024874+00:00"}