{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:MQZGFUZBZUM35G2NMCBBYO24MB","short_pith_number":"pith:MQZGFUZB","canonical_record":{"source":{"id":"1501.02273","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2015-01-09T21:00:19Z","cross_cats_sorted":[],"title_canon_sha256":"661b36239d97b8d81b39439e02cdc64ec38a5d61684f3d1d47e8c4bf88e18dd2","abstract_canon_sha256":"d32168200dda9edd6cf60cb2849ae158bae0757494152e495e162e704d04db06"},"schema_version":"1.0"},"canonical_sha256":"643262d321cd19be9b4d60821c3b5c605e1a8fa8bf137f6cd83822eaaf4b258c","source":{"kind":"arxiv","id":"1501.02273","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1501.02273","created_at":"2026-05-18T02:26:29Z"},{"alias_kind":"arxiv_version","alias_value":"1501.02273v2","created_at":"2026-05-18T02:26:29Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1501.02273","created_at":"2026-05-18T02:26:29Z"},{"alias_kind":"pith_short_12","alias_value":"MQZGFUZBZUM3","created_at":"2026-05-18T12:29:32Z"},{"alias_kind":"pith_short_16","alias_value":"MQZGFUZBZUM35G2N","created_at":"2026-05-18T12:29:32Z"},{"alias_kind":"pith_short_8","alias_value":"MQZGFUZB","created_at":"2026-05-18T12:29:32Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:MQZGFUZBZUM35G2NMCBBYO24MB","target":"record","payload":{"canonical_record":{"source":{"id":"1501.02273","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2015-01-09T21:00:19Z","cross_cats_sorted":[],"title_canon_sha256":"661b36239d97b8d81b39439e02cdc64ec38a5d61684f3d1d47e8c4bf88e18dd2","abstract_canon_sha256":"d32168200dda9edd6cf60cb2849ae158bae0757494152e495e162e704d04db06"},"schema_version":"1.0"},"canonical_sha256":"643262d321cd19be9b4d60821c3b5c605e1a8fa8bf137f6cd83822eaaf4b258c","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:26:29.802705Z","signature_b64":"k9dYKbb1m+hH7J14bpoHt+zxKptNu67dW0VtyaRuYcjvd5LmqdhIY3LmIppDx2IQPm4s01AU/fjRkOvTmRE9Cg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"643262d321cd19be9b4d60821c3b5c605e1a8fa8bf137f6cd83822eaaf4b258c","last_reissued_at":"2026-05-18T02:26:29.802288Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:26:29.802288Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1501.02273","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":"2026-05-18T02:26:29Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"7j3OvvfMf6IAMxToL4JcN4JvtP/HATymW1+LJEAxtw6WeREo93MfGcytPplRQ0OO31Ccz/5HBRknUTqQebzZBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-24T21:24:47.711855Z"},"content_sha256":"def6a8bcd1137514ff2380225ecb3d8d66c779b934a6dbfc61053d75de2164b6","schema_version":"1.0","event_id":"sha256:def6a8bcd1137514ff2380225ecb3d8d66c779b934a6dbfc61053d75de2164b6"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:MQZGFUZBZUM35G2NMCBBYO24MB","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Exciton band structure of monolayer MoS2","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mes-hall","authors_text":"A. H. MacDonald, Fanyao Qu, Fengcheng Wu","submitted_at":"2015-01-09T21:00:19Z","abstract_excerpt":"We address the properties of excitons in monolayer MoS$_2$ from a theoretical point of view, showing that low-energy excitonic states occur both at the Brillouin zone center and at the Brillouin-zone corners, that binding energies at the Brillouin-zone center deviate strongly from the $(n-1/2)^{-2}$ pattern of the two-dimensional hydrogenic model, and that the valley-degenerate exciton doublet at the Brillouin-zone center splits at finite momentum into an upper mode with non-analytic linear dispersion and a lower mode with quadratic dispersion. Although monolayer MoS$_2$ is a direct-gap semico"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1501.02273","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":"2026-05-18T02:26:29Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"qym8a/mxTcjqBajgbMEtLhm85NrUWaX4hJv90li5mbEVxPHUddW0ixiBI+nxHI8zl4N4/L3RQTqpP1SyMoZJBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-24T21:24:47.712234Z"},"content_sha256":"5af89b2572b41043484188cd3578645831bf812da9265a6f66fe1cc4e1d20244","schema_version":"1.0","event_id":"sha256:5af89b2572b41043484188cd3578645831bf812da9265a6f66fe1cc4e1d20244"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/MQZGFUZBZUM35G2NMCBBYO24MB/bundle.json","state_url":"https://pith.science/pith/MQZGFUZBZUM35G2NMCBBYO24MB/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/MQZGFUZBZUM35G2NMCBBYO24MB/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":"2026-05-24T21:24:47Z","links":{"resolver":"https://pith.science/pith/MQZGFUZBZUM35G2NMCBBYO24MB","bundle":"https://pith.science/pith/MQZGFUZBZUM35G2NMCBBYO24MB/bundle.json","state":"https://pith.science/pith/MQZGFUZBZUM35G2NMCBBYO24MB/state.json","well_known_bundle":"https://pith.science/.well-known/pith/MQZGFUZBZUM35G2NMCBBYO24MB/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:MQZGFUZBZUM35G2NMCBBYO24MB","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":"d32168200dda9edd6cf60cb2849ae158bae0757494152e495e162e704d04db06","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2015-01-09T21:00:19Z","title_canon_sha256":"661b36239d97b8d81b39439e02cdc64ec38a5d61684f3d1d47e8c4bf88e18dd2"},"schema_version":"1.0","source":{"id":"1501.02273","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1501.02273","created_at":"2026-05-18T02:26:29Z"},{"alias_kind":"arxiv_version","alias_value":"1501.02273v2","created_at":"2026-05-18T02:26:29Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1501.02273","created_at":"2026-05-18T02:26:29Z"},{"alias_kind":"pith_short_12","alias_value":"MQZGFUZBZUM3","created_at":"2026-05-18T12:29:32Z"},{"alias_kind":"pith_short_16","alias_value":"MQZGFUZBZUM35G2N","created_at":"2026-05-18T12:29:32Z"},{"alias_kind":"pith_short_8","alias_value":"MQZGFUZB","created_at":"2026-05-18T12:29:32Z"}],"graph_snapshots":[{"event_id":"sha256:5af89b2572b41043484188cd3578645831bf812da9265a6f66fe1cc4e1d20244","target":"graph","created_at":"2026-05-18T02:26:29Z","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":"We address the properties of excitons in monolayer MoS$_2$ from a theoretical point of view, showing that low-energy excitonic states occur both at the Brillouin zone center and at the Brillouin-zone corners, that binding energies at the Brillouin-zone center deviate strongly from the $(n-1/2)^{-2}$ pattern of the two-dimensional hydrogenic model, and that the valley-degenerate exciton doublet at the Brillouin-zone center splits at finite momentum into an upper mode with non-analytic linear dispersion and a lower mode with quadratic dispersion. Although monolayer MoS$_2$ is a direct-gap semico","authors_text":"A. H. MacDonald, Fanyao Qu, Fengcheng Wu","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2015-01-09T21:00:19Z","title":"Exciton band structure of monolayer MoS2"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1501.02273","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:def6a8bcd1137514ff2380225ecb3d8d66c779b934a6dbfc61053d75de2164b6","target":"record","created_at":"2026-05-18T02:26:29Z","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":"d32168200dda9edd6cf60cb2849ae158bae0757494152e495e162e704d04db06","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2015-01-09T21:00:19Z","title_canon_sha256":"661b36239d97b8d81b39439e02cdc64ec38a5d61684f3d1d47e8c4bf88e18dd2"},"schema_version":"1.0","source":{"id":"1501.02273","kind":"arxiv","version":2}},"canonical_sha256":"643262d321cd19be9b4d60821c3b5c605e1a8fa8bf137f6cd83822eaaf4b258c","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"643262d321cd19be9b4d60821c3b5c605e1a8fa8bf137f6cd83822eaaf4b258c","first_computed_at":"2026-05-18T02:26:29.802288Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:26:29.802288Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"k9dYKbb1m+hH7J14bpoHt+zxKptNu67dW0VtyaRuYcjvd5LmqdhIY3LmIppDx2IQPm4s01AU/fjRkOvTmRE9Cg==","signature_status":"signed_v1","signed_at":"2026-05-18T02:26:29.802705Z","signed_message":"canonical_sha256_bytes"},"source_id":"1501.02273","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:def6a8bcd1137514ff2380225ecb3d8d66c779b934a6dbfc61053d75de2164b6","sha256:5af89b2572b41043484188cd3578645831bf812da9265a6f66fe1cc4e1d20244"],"state_sha256":"f038edb7e9881e2a1cd6eb1c3e169bde1619963fd467ad516a8531b979db5ba7"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Bp4haWUCbk/g1R1x8jyyTtsqqTLoLAP45sMw3hXmERgE6YD0D9sthH/3T4Ww8QM8Rz4EWe6rcSeZTijI75KOAw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-24T21:24:47.715865Z","bundle_sha256":"0666eeaed32816599ed483546363b1e60d28b4ef0b56f8ea027a34ce70f1a256"}}