{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2012:26NY7IVEWK4DHRFZD4VKUDA5TH","short_pith_number":"pith:26NY7IVE","canonical_record":{"source":{"id":"1203.0644","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2012-03-03T12:07:16Z","cross_cats_sorted":[],"title_canon_sha256":"033e4b6dc4e2a1fdaffddacccc99208a246e8952bbb10df03d4c763a759412ee","abstract_canon_sha256":"415d86165c390fd08e2527afdbe14c5154e71bae8d677c777e1d799c820897b4"},"schema_version":"1.0"},"canonical_sha256":"d79b8fa2a4b2b833c4b91f2aaa0c1d99d07c906ab2ba4d93000bacfda27a4940","source":{"kind":"arxiv","id":"1203.0644","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1203.0644","created_at":"2026-05-18T01:58:15Z"},{"alias_kind":"arxiv_version","alias_value":"1203.0644v1","created_at":"2026-05-18T01:58:15Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1203.0644","created_at":"2026-05-18T01:58:15Z"},{"alias_kind":"pith_short_12","alias_value":"26NY7IVEWK4D","created_at":"2026-05-18T12:26:50Z"},{"alias_kind":"pith_short_16","alias_value":"26NY7IVEWK4DHRFZ","created_at":"2026-05-18T12:26:50Z"},{"alias_kind":"pith_short_8","alias_value":"26NY7IVE","created_at":"2026-05-18T12:26:50Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2012:26NY7IVEWK4DHRFZD4VKUDA5TH","target":"record","payload":{"canonical_record":{"source":{"id":"1203.0644","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2012-03-03T12:07:16Z","cross_cats_sorted":[],"title_canon_sha256":"033e4b6dc4e2a1fdaffddacccc99208a246e8952bbb10df03d4c763a759412ee","abstract_canon_sha256":"415d86165c390fd08e2527afdbe14c5154e71bae8d677c777e1d799c820897b4"},"schema_version":"1.0"},"canonical_sha256":"d79b8fa2a4b2b833c4b91f2aaa0c1d99d07c906ab2ba4d93000bacfda27a4940","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:58:15.302786Z","signature_b64":"+8qh+SstvGHzw3KhdgWPWhq+jIlQKTaXnmsWhOjuq/9gLq0nV1AYiq60jVp0++CiXaNyTU91Kd9MI99wm5lNAA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"d79b8fa2a4b2b833c4b91f2aaa0c1d99d07c906ab2ba4d93000bacfda27a4940","last_reissued_at":"2026-05-18T01:58:15.302257Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:58:15.302257Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1203.0644","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T01:58:15Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"qQ36kTkMdPr31ean5Bm1UQICC1b+6q1bM0nEYmyDFDbkULNNJ4ZAGVK2xOWWioi9JvSIfIJalR4/0W5ZExMwBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T12:32:05.454061Z"},"content_sha256":"76f36498f9e5e014f0bd667c7376977a44b09049eff2219ee56762dae7ba9e2c","schema_version":"1.0","event_id":"sha256:76f36498f9e5e014f0bd667c7376977a44b09049eff2219ee56762dae7ba9e2c"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2012:26NY7IVEWK4DHRFZD4VKUDA5TH","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Crystal structure and electronic structure of quaternary semiconductors Cu$_2$ZnTiSe$_4$ and Cu$_2$ZnTiS$_4$ for solar cell absorber","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mtrl-sci","authors_text":"Junjie Li, Sumei Huang, Wenhui Xie, Xiaofeng Wang, Zhenjie Zhao","submitted_at":"2012-03-03T12:07:16Z","abstract_excerpt":"We design two new I2-II-IV-VI4 quaternary semiconductors Cu$_2$ZnTiSe$_4$ and Cu$_2$ZnTiS$_4$, and systematically study the crystal and electronic structure by employing first-principles electronic structure calculations. Among the considered crystal structures, it is confirmed that the band gaps of Cu$_2$ZnTiSe$_4$ and Cu$_2$ZnTiS$_4$ originate from the full occupied Cu 3$d$ valence band and unoccupied Ti 3$d$ conducting band, and kesterite structure should be the ground state. Furthermore, our calculations indicate that Cu$_2$ZnTiSe$_4$ and Cu$_2$ZnTiS$_4$ have comparable band gaps with Cu$_"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1203.0644","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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T01:58:15Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"+EvbuoFb01ifYZ1L4Vl+PVVfsGhsJx2MxtAKjMHzli2n6xdhGgtQKQE5lwDw9hTBBg+h+EFfbHj87SdAHFjoDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T12:32:05.454439Z"},"content_sha256":"6aaa957b20957964be3577f7a14dac3937f21be81961011c7e8a894604dbd430","schema_version":"1.0","event_id":"sha256:6aaa957b20957964be3577f7a14dac3937f21be81961011c7e8a894604dbd430"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/26NY7IVEWK4DHRFZD4VKUDA5TH/bundle.json","state_url":"https://pith.science/pith/26NY7IVEWK4DHRFZD4VKUDA5TH/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/26NY7IVEWK4DHRFZD4VKUDA5TH/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":"2026-05-28T12:32:05Z","links":{"resolver":"https://pith.science/pith/26NY7IVEWK4DHRFZD4VKUDA5TH","bundle":"https://pith.science/pith/26NY7IVEWK4DHRFZD4VKUDA5TH/bundle.json","state":"https://pith.science/pith/26NY7IVEWK4DHRFZD4VKUDA5TH/state.json","well_known_bundle":"https://pith.science/.well-known/pith/26NY7IVEWK4DHRFZD4VKUDA5TH/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:26NY7IVEWK4DHRFZD4VKUDA5TH","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":"415d86165c390fd08e2527afdbe14c5154e71bae8d677c777e1d799c820897b4","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2012-03-03T12:07:16Z","title_canon_sha256":"033e4b6dc4e2a1fdaffddacccc99208a246e8952bbb10df03d4c763a759412ee"},"schema_version":"1.0","source":{"id":"1203.0644","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1203.0644","created_at":"2026-05-18T01:58:15Z"},{"alias_kind":"arxiv_version","alias_value":"1203.0644v1","created_at":"2026-05-18T01:58:15Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1203.0644","created_at":"2026-05-18T01:58:15Z"},{"alias_kind":"pith_short_12","alias_value":"26NY7IVEWK4D","created_at":"2026-05-18T12:26:50Z"},{"alias_kind":"pith_short_16","alias_value":"26NY7IVEWK4DHRFZ","created_at":"2026-05-18T12:26:50Z"},{"alias_kind":"pith_short_8","alias_value":"26NY7IVE","created_at":"2026-05-18T12:26:50Z"}],"graph_snapshots":[{"event_id":"sha256:6aaa957b20957964be3577f7a14dac3937f21be81961011c7e8a894604dbd430","target":"graph","created_at":"2026-05-18T01:58:15Z","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 design two new I2-II-IV-VI4 quaternary semiconductors Cu$_2$ZnTiSe$_4$ and Cu$_2$ZnTiS$_4$, and systematically study the crystal and electronic structure by employing first-principles electronic structure calculations. Among the considered crystal structures, it is confirmed that the band gaps of Cu$_2$ZnTiSe$_4$ and Cu$_2$ZnTiS$_4$ originate from the full occupied Cu 3$d$ valence band and unoccupied Ti 3$d$ conducting band, and kesterite structure should be the ground state. Furthermore, our calculations indicate that Cu$_2$ZnTiSe$_4$ and Cu$_2$ZnTiS$_4$ have comparable band gaps with Cu$_","authors_text":"Junjie Li, Sumei Huang, Wenhui Xie, Xiaofeng Wang, Zhenjie Zhao","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2012-03-03T12:07:16Z","title":"Crystal structure and electronic structure of quaternary semiconductors Cu$_2$ZnTiSe$_4$ and Cu$_2$ZnTiS$_4$ for solar cell absorber"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1203.0644","kind":"arxiv","version":1},"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":"sha256:76f36498f9e5e014f0bd667c7376977a44b09049eff2219ee56762dae7ba9e2c","target":"record","created_at":"2026-05-18T01:58:15Z","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":"415d86165c390fd08e2527afdbe14c5154e71bae8d677c777e1d799c820897b4","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2012-03-03T12:07:16Z","title_canon_sha256":"033e4b6dc4e2a1fdaffddacccc99208a246e8952bbb10df03d4c763a759412ee"},"schema_version":"1.0","source":{"id":"1203.0644","kind":"arxiv","version":1}},"canonical_sha256":"d79b8fa2a4b2b833c4b91f2aaa0c1d99d07c906ab2ba4d93000bacfda27a4940","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"d79b8fa2a4b2b833c4b91f2aaa0c1d99d07c906ab2ba4d93000bacfda27a4940","first_computed_at":"2026-05-18T01:58:15.302257Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:58:15.302257Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"+8qh+SstvGHzw3KhdgWPWhq+jIlQKTaXnmsWhOjuq/9gLq0nV1AYiq60jVp0++CiXaNyTU91Kd9MI99wm5lNAA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:58:15.302786Z","signed_message":"canonical_sha256_bytes"},"source_id":"1203.0644","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:76f36498f9e5e014f0bd667c7376977a44b09049eff2219ee56762dae7ba9e2c","sha256:6aaa957b20957964be3577f7a14dac3937f21be81961011c7e8a894604dbd430"],"state_sha256":"291a4b0ef8136cc5ea579ee2d46c0cb889d9ab3732eb0e4b27e41a5277c6fc5a"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"y1XGU08oO+yaZyYyN9EZEURXAOBOaE9aaAbJ9i5XJRWJ4HV1S5FQOLm3ir7+9Fe/ahldKGk/nOZhw3QwSXqMDg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-28T12:32:05.456567Z","bundle_sha256":"b337ce2a18228cc74a3306200cf3e7b533763005cb665378ddc66a0c664052f1"}}