{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2012:X3LGKO3PMHEM5N64IRQQ4YL7YS","short_pith_number":"pith:X3LGKO3P","schema_version":"1.0","canonical_sha256":"bed6653b6f61c8ceb7dc44610e617fc4884f81f7c1a96ffe4e38ccd1504b4c0e","source":{"kind":"arxiv","id":"1205.3654","version":1},"attestation_state":"computed","paper":{"title":"Unexpected mass acquisition of Dirac fermions at the quantum phase transition of a topological insulator","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.str-el"],"primary_cat":"cond-mat.mes-hall","authors_text":"K. Eto, K. Kosaka, K. Nakayama, Kouji Segawa, S. Souma, T. Minami, T. Sato, T. Takahashi, Yoichi Ando","submitted_at":"2012-05-16T12:25:36Z","abstract_excerpt":"The three-dimensional (3D) topological insulator is a novel quantum state of matter where an insulating bulk hosts a linearly-dispersing surface state, which can be viewed as a sea of massless Dirac fermions protected by the time-reversal symmetry (TRS). Breaking the TRS by a magnetic order leads to the opening of a gap in the surface state and consequently the Dirac fermions become massive. It has been proposed theoretically that such a mass acquisition is necessary for realizing novel topological phenomena, but achieving a sufficiently large mass is an experimental challenge. Here we report "},"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":"1205.3654","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2012-05-16T12:25:36Z","cross_cats_sorted":["cond-mat.str-el"],"title_canon_sha256":"b3703edc424dc4838ba6b16b3491418ddf0ac0ddd03d5ab1d97ca187c33c3c60","abstract_canon_sha256":"2b1c753a5b965a7f257a167e2e6334e9166d4523e47beaacf188d251beb8bff4"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:55:34.495351Z","signature_b64":"ZI5Qnbnzv9CfSDRxs8rbLKwkGNXU2rGfsgU+2JngKFv9Lwuo+2QiM8PcI3yUteXEA4qwMHUesFiICXERpR2EDA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"bed6653b6f61c8ceb7dc44610e617fc4884f81f7c1a96ffe4e38ccd1504b4c0e","last_reissued_at":"2026-05-18T03:55:34.494650Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:55:34.494650Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Unexpected mass acquisition of Dirac fermions at the quantum phase transition of a topological insulator","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.str-el"],"primary_cat":"cond-mat.mes-hall","authors_text":"K. Eto, K. Kosaka, K. Nakayama, Kouji Segawa, S. Souma, T. Minami, T. Sato, T. Takahashi, Yoichi Ando","submitted_at":"2012-05-16T12:25:36Z","abstract_excerpt":"The three-dimensional (3D) topological insulator is a novel quantum state of matter where an insulating bulk hosts a linearly-dispersing surface state, which can be viewed as a sea of massless Dirac fermions protected by the time-reversal symmetry (TRS). Breaking the TRS by a magnetic order leads to the opening of a gap in the surface state and consequently the Dirac fermions become massive. It has been proposed theoretically that such a mass acquisition is necessary for realizing novel topological phenomena, but achieving a sufficiently large mass is an experimental challenge. Here we report "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1205.3654","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":"1205.3654","created_at":"2026-05-18T03:55:34.494765+00:00"},{"alias_kind":"arxiv_version","alias_value":"1205.3654v1","created_at":"2026-05-18T03:55:34.494765+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1205.3654","created_at":"2026-05-18T03:55:34.494765+00:00"},{"alias_kind":"pith_short_12","alias_value":"X3LGKO3PMHEM","created_at":"2026-05-18T12:27:27.928770+00:00"},{"alias_kind":"pith_short_16","alias_value":"X3LGKO3PMHEM5N64","created_at":"2026-05-18T12:27:27.928770+00:00"},{"alias_kind":"pith_short_8","alias_value":"X3LGKO3P","created_at":"2026-05-18T12:27:27.928770+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/X3LGKO3PMHEM5N64IRQQ4YL7YS","json":"https://pith.science/pith/X3LGKO3PMHEM5N64IRQQ4YL7YS.json","graph_json":"https://pith.science/api/pith-number/X3LGKO3PMHEM5N64IRQQ4YL7YS/graph.json","events_json":"https://pith.science/api/pith-number/X3LGKO3PMHEM5N64IRQQ4YL7YS/events.json","paper":"https://pith.science/paper/X3LGKO3P"},"agent_actions":{"view_html":"https://pith.science/pith/X3LGKO3PMHEM5N64IRQQ4YL7YS","download_json":"https://pith.science/pith/X3LGKO3PMHEM5N64IRQQ4YL7YS.json","view_paper":"https://pith.science/paper/X3LGKO3P","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1205.3654&json=true","fetch_graph":"https://pith.science/api/pith-number/X3LGKO3PMHEM5N64IRQQ4YL7YS/graph.json","fetch_events":"https://pith.science/api/pith-number/X3LGKO3PMHEM5N64IRQQ4YL7YS/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/X3LGKO3PMHEM5N64IRQQ4YL7YS/action/timestamp_anchor","attest_storage":"https://pith.science/pith/X3LGKO3PMHEM5N64IRQQ4YL7YS/action/storage_attestation","attest_author":"https://pith.science/pith/X3LGKO3PMHEM5N64IRQQ4YL7YS/action/author_attestation","sign_citation":"https://pith.science/pith/X3LGKO3PMHEM5N64IRQQ4YL7YS/action/citation_signature","submit_replication":"https://pith.science/pith/X3LGKO3PMHEM5N64IRQQ4YL7YS/action/replication_record"}},"created_at":"2026-05-18T03:55:34.494765+00:00","updated_at":"2026-05-18T03:55:34.494765+00:00"}