{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:IKMKAUJDKBTOPFULPKLBVIC5CW","short_pith_number":"pith:IKMKAUJD","canonical_record":{"source":{"id":"1901.05121","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2019-01-16T03:01:30Z","cross_cats_sorted":[],"title_canon_sha256":"cf540a3de72a8cf6df9527ac49b8ab12595826010a398e10ad77e08ca59ad079","abstract_canon_sha256":"3ee2cb1b89d094f7cb2ab01aa8e52a4e0ee4f37845558ff1825035e1392cf529"},"schema_version":"1.0"},"canonical_sha256":"4298a051235066e7968b7a961aa05d15bbb9bd2c09875b8e98e842d611cb5bb0","source":{"kind":"arxiv","id":"1901.05121","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1901.05121","created_at":"2026-05-17T23:56:11Z"},{"alias_kind":"arxiv_version","alias_value":"1901.05121v1","created_at":"2026-05-17T23:56:11Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1901.05121","created_at":"2026-05-17T23:56:11Z"},{"alias_kind":"pith_short_12","alias_value":"IKMKAUJDKBTO","created_at":"2026-05-18T12:33:18Z"},{"alias_kind":"pith_short_16","alias_value":"IKMKAUJDKBTOPFUL","created_at":"2026-05-18T12:33:18Z"},{"alias_kind":"pith_short_8","alias_value":"IKMKAUJD","created_at":"2026-05-18T12:33:18Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:IKMKAUJDKBTOPFULPKLBVIC5CW","target":"record","payload":{"canonical_record":{"source":{"id":"1901.05121","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2019-01-16T03:01:30Z","cross_cats_sorted":[],"title_canon_sha256":"cf540a3de72a8cf6df9527ac49b8ab12595826010a398e10ad77e08ca59ad079","abstract_canon_sha256":"3ee2cb1b89d094f7cb2ab01aa8e52a4e0ee4f37845558ff1825035e1392cf529"},"schema_version":"1.0"},"canonical_sha256":"4298a051235066e7968b7a961aa05d15bbb9bd2c09875b8e98e842d611cb5bb0","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:56:11.861651Z","signature_b64":"fcNGvuYEjOnLw/TMGOZKkT5bAmERIllh/B6CMd9lSEVMeMJKNemYfzG8ii74Sqs10PUPleKmfdg2ILL3kJDaAg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"4298a051235066e7968b7a961aa05d15bbb9bd2c09875b8e98e842d611cb5bb0","last_reissued_at":"2026-05-17T23:56:11.861137Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:56:11.861137Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1901.05121","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":"2026-05-17T23:56:11Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"g5iEp69tjBrHWD1gQnjETvsOX8vKwEypAWWv3iMg+5AtD9DdunjMJM6Qg3k5646Na4ybLZt1R6NIwMZrFLDxCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T08:40:32.122125Z"},"content_sha256":"0026fe4e999de1d44ffe120164f3771fd142e861f38238a376ca63cc7a877d2c","schema_version":"1.0","event_id":"sha256:0026fe4e999de1d44ffe120164f3771fd142e861f38238a376ca63cc7a877d2c"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:IKMKAUJDKBTOPFULPKLBVIC5CW","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Discovery of Hidden Classes of Layered Electrides by Extensive High-throughput Materials Screening","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mtrl-sci","authors_text":"Haixia Cheng, Jun Zhou, Lei Shen, Ming Yang, Weilong Kong, Yuan Ping Feng","submitted_at":"2019-01-16T03:01:30Z","abstract_excerpt":"Despite their extraordinary properties, electrides are still a relatively unexplored class of materials with only a few compounds grown experimentally. Especially for layered electrides, the current researches mainly focus on several isostructures of Ca2N with similar interlayer two-dimensional (2D) anionic electrons. An extensive screening for different layered electrides is still missing. Here, by screening materials with anionic electrons for the structures in Materials Project, we uncover 12 existing materials as new layered electrides. Remarkably, these layered electrides demonstrate comp"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1901.05121","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":"2026-05-17T23:56:11Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"j747f8Sx8A65EqOBe33X7Y6PxN2slBu28U/FL8c2oFaih1HiIbtrvZCQKSdIGr+jDiWx8ovi8mULBHZI98pxBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T08:40:32.122538Z"},"content_sha256":"baa9d4b93a97c930764bce2d45f2f4adbb93098387875a4f6420a1b384abb56a","schema_version":"1.0","event_id":"sha256:baa9d4b93a97c930764bce2d45f2f4adbb93098387875a4f6420a1b384abb56a"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/IKMKAUJDKBTOPFULPKLBVIC5CW/bundle.json","state_url":"https://pith.science/pith/IKMKAUJDKBTOPFULPKLBVIC5CW/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/IKMKAUJDKBTOPFULPKLBVIC5CW/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":"2026-05-30T08:40:32Z","links":{"resolver":"https://pith.science/pith/IKMKAUJDKBTOPFULPKLBVIC5CW","bundle":"https://pith.science/pith/IKMKAUJDKBTOPFULPKLBVIC5CW/bundle.json","state":"https://pith.science/pith/IKMKAUJDKBTOPFULPKLBVIC5CW/state.json","well_known_bundle":"https://pith.science/.well-known/pith/IKMKAUJDKBTOPFULPKLBVIC5CW/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:IKMKAUJDKBTOPFULPKLBVIC5CW","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":"3ee2cb1b89d094f7cb2ab01aa8e52a4e0ee4f37845558ff1825035e1392cf529","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2019-01-16T03:01:30Z","title_canon_sha256":"cf540a3de72a8cf6df9527ac49b8ab12595826010a398e10ad77e08ca59ad079"},"schema_version":"1.0","source":{"id":"1901.05121","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1901.05121","created_at":"2026-05-17T23:56:11Z"},{"alias_kind":"arxiv_version","alias_value":"1901.05121v1","created_at":"2026-05-17T23:56:11Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1901.05121","created_at":"2026-05-17T23:56:11Z"},{"alias_kind":"pith_short_12","alias_value":"IKMKAUJDKBTO","created_at":"2026-05-18T12:33:18Z"},{"alias_kind":"pith_short_16","alias_value":"IKMKAUJDKBTOPFUL","created_at":"2026-05-18T12:33:18Z"},{"alias_kind":"pith_short_8","alias_value":"IKMKAUJD","created_at":"2026-05-18T12:33:18Z"}],"graph_snapshots":[{"event_id":"sha256:baa9d4b93a97c930764bce2d45f2f4adbb93098387875a4f6420a1b384abb56a","target":"graph","created_at":"2026-05-17T23:56:11Z","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":"Despite their extraordinary properties, electrides are still a relatively unexplored class of materials with only a few compounds grown experimentally. Especially for layered electrides, the current researches mainly focus on several isostructures of Ca2N with similar interlayer two-dimensional (2D) anionic electrons. An extensive screening for different layered electrides is still missing. Here, by screening materials with anionic electrons for the structures in Materials Project, we uncover 12 existing materials as new layered electrides. Remarkably, these layered electrides demonstrate comp","authors_text":"Haixia Cheng, Jun Zhou, Lei Shen, Ming Yang, Weilong Kong, Yuan Ping Feng","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2019-01-16T03:01:30Z","title":"Discovery of Hidden Classes of Layered Electrides by Extensive High-throughput Materials Screening"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1901.05121","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":"sha256:0026fe4e999de1d44ffe120164f3771fd142e861f38238a376ca63cc7a877d2c","target":"record","created_at":"2026-05-17T23:56:11Z","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":"3ee2cb1b89d094f7cb2ab01aa8e52a4e0ee4f37845558ff1825035e1392cf529","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2019-01-16T03:01:30Z","title_canon_sha256":"cf540a3de72a8cf6df9527ac49b8ab12595826010a398e10ad77e08ca59ad079"},"schema_version":"1.0","source":{"id":"1901.05121","kind":"arxiv","version":1}},"canonical_sha256":"4298a051235066e7968b7a961aa05d15bbb9bd2c09875b8e98e842d611cb5bb0","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"4298a051235066e7968b7a961aa05d15bbb9bd2c09875b8e98e842d611cb5bb0","first_computed_at":"2026-05-17T23:56:11.861137Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:56:11.861137Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"fcNGvuYEjOnLw/TMGOZKkT5bAmERIllh/B6CMd9lSEVMeMJKNemYfzG8ii74Sqs10PUPleKmfdg2ILL3kJDaAg==","signature_status":"signed_v1","signed_at":"2026-05-17T23:56:11.861651Z","signed_message":"canonical_sha256_bytes"},"source_id":"1901.05121","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:0026fe4e999de1d44ffe120164f3771fd142e861f38238a376ca63cc7a877d2c","sha256:baa9d4b93a97c930764bce2d45f2f4adbb93098387875a4f6420a1b384abb56a"],"state_sha256":"80a05dd82b0e42205c4c36a088f9a882cd70f0420e5ca50a046216f137fe1b39"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"kzSkMwqpopAkW0FiHtqWLBLOlFcdsZgIiH7tNVleZywzVTuj1xi+cfZgE8qp2BeJR0bluiE4AI8RRcW2imEgBQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-30T08:40:32.124821Z","bundle_sha256":"ed53744e6b003342f972a75c97445849e7823ee2702b0841e4f6801b78378d0f"}}