{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2012:F3OHC5OSXLGCL5SROVNLVKLOOC","short_pith_number":"pith:F3OHC5OS","canonical_record":{"source":{"id":"1208.2567","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2012-08-13T12:41:15Z","cross_cats_sorted":[],"title_canon_sha256":"1377a6224e7721b1e3f574eb658d5743e31df7a985640e267f1b9477361fbf9a","abstract_canon_sha256":"84d359479a65c34c16b0f00c3ad5a56ad49908e210499cd86cd0e6b7a0b79b10"},"schema_version":"1.0"},"canonical_sha256":"2edc7175d2bacc25f651755abaa96e70b92935c98c12454a820aa7699cbe78ac","source":{"kind":"arxiv","id":"1208.2567","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1208.2567","created_at":"2026-05-18T01:55:16Z"},{"alias_kind":"arxiv_version","alias_value":"1208.2567v2","created_at":"2026-05-18T01:55:16Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1208.2567","created_at":"2026-05-18T01:55:16Z"},{"alias_kind":"pith_short_12","alias_value":"F3OHC5OSXLGC","created_at":"2026-05-18T12:27:04Z"},{"alias_kind":"pith_short_16","alias_value":"F3OHC5OSXLGCL5SR","created_at":"2026-05-18T12:27:04Z"},{"alias_kind":"pith_short_8","alias_value":"F3OHC5OS","created_at":"2026-05-18T12:27:04Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2012:F3OHC5OSXLGCL5SROVNLVKLOOC","target":"record","payload":{"canonical_record":{"source":{"id":"1208.2567","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2012-08-13T12:41:15Z","cross_cats_sorted":[],"title_canon_sha256":"1377a6224e7721b1e3f574eb658d5743e31df7a985640e267f1b9477361fbf9a","abstract_canon_sha256":"84d359479a65c34c16b0f00c3ad5a56ad49908e210499cd86cd0e6b7a0b79b10"},"schema_version":"1.0"},"canonical_sha256":"2edc7175d2bacc25f651755abaa96e70b92935c98c12454a820aa7699cbe78ac","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:55:16.443410Z","signature_b64":"WslLlFVvAUIqfD6ZB2zQfmo+7QDeW2DH4FycOgN6WykMQo2Lpq09YSdBRZBqJCp/rhrdxfWaP82VjRQh8BHJAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"2edc7175d2bacc25f651755abaa96e70b92935c98c12454a820aa7699cbe78ac","last_reissued_at":"2026-05-18T01:55:16.443023Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:55:16.443023Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1208.2567","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T01:55:16Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"VphWGVvQhtl2X7CuRo1sTenwPr6Xlo9oKKHTi2VCR/2vixvMDsJIeqW41xmzQBWqdkTlAdIiuPE5txTrzRHPAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T01:16:02.385945Z"},"content_sha256":"206edeeb15c1245aca957a4877349e46a7173279057e151ea27f0b269c24a82d","schema_version":"1.0","event_id":"sha256:206edeeb15c1245aca957a4877349e46a7173279057e151ea27f0b269c24a82d"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2012:F3OHC5OSXLGCL5SROVNLVKLOOC","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Graphene superlattice with periodically modulated Dirac gap","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mes-hall","authors_text":"A. V. Telezhnikov, E. S. Azarova, G. M. Maksimova, V. A. Burdov","submitted_at":"2012-08-13T12:41:15Z","abstract_excerpt":"Graphene-based superlattice (SL) formed by a periodic gap modulation is studied theoretically using a Dirac-type Hamiltonian. Analyzing the dispersion relation we have found that new Dirac points arise in the electronic spectrum under certain conditions. As a result, the gap between conduction and valence minibands disappears. The expressions for the position of these Dirac points in ${\\bf k}$-space and threshold value of the potential for their emergence were obtained. At some parameters of the system, we have revealed interface states which form the top of the valence miniband."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1208.2567","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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T01:55:16Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"zjWja2aLlRIFZAlsf3u/ElRNh+t69ufxf3e02UrbN8l5v69I8vMorduXx/80CyzPcftpevWseuIlQV2UbTo5Dg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T01:16:02.386625Z"},"content_sha256":"e90cfcf5bf062bbe0b4ca00b4aef8d7fe487afc1a00603859381536aedd34f59","schema_version":"1.0","event_id":"sha256:e90cfcf5bf062bbe0b4ca00b4aef8d7fe487afc1a00603859381536aedd34f59"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/F3OHC5OSXLGCL5SROVNLVKLOOC/bundle.json","state_url":"https://pith.science/pith/F3OHC5OSXLGCL5SROVNLVKLOOC/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/F3OHC5OSXLGCL5SROVNLVKLOOC/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-05-31T01:16:02Z","links":{"resolver":"https://pith.science/pith/F3OHC5OSXLGCL5SROVNLVKLOOC","bundle":"https://pith.science/pith/F3OHC5OSXLGCL5SROVNLVKLOOC/bundle.json","state":"https://pith.science/pith/F3OHC5OSXLGCL5SROVNLVKLOOC/state.json","well_known_bundle":"https://pith.science/.well-known/pith/F3OHC5OSXLGCL5SROVNLVKLOOC/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:F3OHC5OSXLGCL5SROVNLVKLOOC","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"84d359479a65c34c16b0f00c3ad5a56ad49908e210499cd86cd0e6b7a0b79b10","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2012-08-13T12:41:15Z","title_canon_sha256":"1377a6224e7721b1e3f574eb658d5743e31df7a985640e267f1b9477361fbf9a"},"schema_version":"1.0","source":{"id":"1208.2567","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1208.2567","created_at":"2026-05-18T01:55:16Z"},{"alias_kind":"arxiv_version","alias_value":"1208.2567v2","created_at":"2026-05-18T01:55:16Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1208.2567","created_at":"2026-05-18T01:55:16Z"},{"alias_kind":"pith_short_12","alias_value":"F3OHC5OSXLGC","created_at":"2026-05-18T12:27:04Z"},{"alias_kind":"pith_short_16","alias_value":"F3OHC5OSXLGCL5SR","created_at":"2026-05-18T12:27:04Z"},{"alias_kind":"pith_short_8","alias_value":"F3OHC5OS","created_at":"2026-05-18T12:27:04Z"}],"graph_snapshots":[{"event_id":"sha256:e90cfcf5bf062bbe0b4ca00b4aef8d7fe487afc1a00603859381536aedd34f59","target":"graph","created_at":"2026-05-18T01:55:16Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"paper":{"abstract_excerpt":"Graphene-based superlattice (SL) formed by a periodic gap modulation is studied theoretically using a Dirac-type Hamiltonian. Analyzing the dispersion relation we have found that new Dirac points arise in the electronic spectrum under certain conditions. As a result, the gap between conduction and valence minibands disappears. The expressions for the position of these Dirac points in ${\\bf k}$-space and threshold value of the potential for their emergence were obtained. At some parameters of the system, we have revealed interface states which form the top of the valence miniband.","authors_text":"A. V. Telezhnikov, E. S. Azarova, G. M. Maksimova, V. A. Burdov","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2012-08-13T12:41:15Z","title":"Graphene superlattice with periodically modulated Dirac gap"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1208.2567","kind":"arxiv","version":2},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:206edeeb15c1245aca957a4877349e46a7173279057e151ea27f0b269c24a82d","target":"record","created_at":"2026-05-18T01:55:16Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"84d359479a65c34c16b0f00c3ad5a56ad49908e210499cd86cd0e6b7a0b79b10","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2012-08-13T12:41:15Z","title_canon_sha256":"1377a6224e7721b1e3f574eb658d5743e31df7a985640e267f1b9477361fbf9a"},"schema_version":"1.0","source":{"id":"1208.2567","kind":"arxiv","version":2}},"canonical_sha256":"2edc7175d2bacc25f651755abaa96e70b92935c98c12454a820aa7699cbe78ac","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"2edc7175d2bacc25f651755abaa96e70b92935c98c12454a820aa7699cbe78ac","first_computed_at":"2026-05-18T01:55:16.443023Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:55:16.443023Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"WslLlFVvAUIqfD6ZB2zQfmo+7QDeW2DH4FycOgN6WykMQo2Lpq09YSdBRZBqJCp/rhrdxfWaP82VjRQh8BHJAw==","signature_status":"signed_v1","signed_at":"2026-05-18T01:55:16.443410Z","signed_message":"canonical_sha256_bytes"},"source_id":"1208.2567","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:206edeeb15c1245aca957a4877349e46a7173279057e151ea27f0b269c24a82d","sha256:e90cfcf5bf062bbe0b4ca00b4aef8d7fe487afc1a00603859381536aedd34f59"],"state_sha256":"15832bd5b9bfc7dfdb41e5ba36c390372cabaf8e1f902346950cb8439bb03f18"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"4tfZx7rcSNQCSmOgdxLdZtEsh6TX/SCTi1LIoDvld4fP0wshk+iWPgY0P/Vjn13t9MomCg8mCpw0X9PuNtuyCA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-31T01:16:02.390352Z","bundle_sha256":"531734f49abf7d29176beb61aa5a35189b3b55394eb802528808a57097f5b1c4"}}