{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:MPXB44CX2A4TBA7E7RCVS3IL55","short_pith_number":"pith:MPXB44CX","canonical_record":{"source":{"id":"1802.08985","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2018-02-25T11:08:41Z","cross_cats_sorted":[],"title_canon_sha256":"2dced066d9d378d32449c8521b401c5aac7560d2d64c0bcdeafa27a26549e352","abstract_canon_sha256":"1c60af56dad126d30e2ad825961563a892117343dc4792ff5b02c8cd08bd8d4b"},"schema_version":"1.0"},"canonical_sha256":"63ee1e7057d0393083e4fc45596d0bef71743dfa0b4e978891f8256cd6059a92","source":{"kind":"arxiv","id":"1802.08985","version":3},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1802.08985","created_at":"2026-05-18T00:15:27Z"},{"alias_kind":"arxiv_version","alias_value":"1802.08985v3","created_at":"2026-05-18T00:15:27Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1802.08985","created_at":"2026-05-18T00:15:27Z"},{"alias_kind":"pith_short_12","alias_value":"MPXB44CX2A4T","created_at":"2026-05-18T12:32:40Z"},{"alias_kind":"pith_short_16","alias_value":"MPXB44CX2A4TBA7E","created_at":"2026-05-18T12:32:40Z"},{"alias_kind":"pith_short_8","alias_value":"MPXB44CX","created_at":"2026-05-18T12:32:40Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:MPXB44CX2A4TBA7E7RCVS3IL55","target":"record","payload":{"canonical_record":{"source":{"id":"1802.08985","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2018-02-25T11:08:41Z","cross_cats_sorted":[],"title_canon_sha256":"2dced066d9d378d32449c8521b401c5aac7560d2d64c0bcdeafa27a26549e352","abstract_canon_sha256":"1c60af56dad126d30e2ad825961563a892117343dc4792ff5b02c8cd08bd8d4b"},"schema_version":"1.0"},"canonical_sha256":"63ee1e7057d0393083e4fc45596d0bef71743dfa0b4e978891f8256cd6059a92","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:15:27.982436Z","signature_b64":"r/S4JDh9k0tHJDAVTI+YdS1jiKJDINr13ABoWKiM05Bayj6K2zdYGaae2aZXLe4F863jKQ7Q3q70kJor1HCADA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"63ee1e7057d0393083e4fc45596d0bef71743dfa0b4e978891f8256cd6059a92","last_reissued_at":"2026-05-18T00:15:27.981797Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:15:27.981797Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1802.08985","source_version":3,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T00:15:27Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"+tuUuZOAbEnXoHT1t8bDOwVHJznJTOWlKIs8VY7La4UgNsBS2aPrfvK43ir0A+SbTu928Gs9d81x2YdnPvqiBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-23T15:06:20.085243Z"},"content_sha256":"51f0a3c14d357d8aac869826f407267e00cff61a51648de6cee69f9ac714e11a","schema_version":"1.0","event_id":"sha256:51f0a3c14d357d8aac869826f407267e00cff61a51648de6cee69f9ac714e11a"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:MPXB44CX2A4TBA7E7RCVS3IL55","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Origin of the anomalous semiconducting behaviour in dense lithium","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mtrl-sci","authors_text":"Gonzalo Guti\\'errez, Mauricio A. Flores","submitted_at":"2018-02-25T11:08:41Z","abstract_excerpt":"Experimentally, it is known that lithium undergoes a metal to semiconductor transition at about 80 GPA and a reentrant semiconductor to metal transition near 120 GPA. This unusual behaviour has been attributed to the formation of high-pressure electrides in the Li-\\textit{Aba}2 phase. Using the accurate wave function based quantum Monte Carlo (DMC) method, we show that the valence charge distribution of the Li-\\textit{Aba}2 phase is incompatible with an insulating or semiconducting ground state. At DMC level, the most stable phase at 100 GPA is an orthorhombic oP24 structure with Pbca symmetry"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1802.08985","kind":"arxiv","version":3},"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":"2026-05-18T00:15:27Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"XgyhpqKvDbEbjwAJOZfQ0kY23cF8m9Q3/Nq4o1+G8HGq25854tiAqnNXYoD40shkIBCrBqy6kCJ5fQK3XH1RDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-23T15:06:20.085614Z"},"content_sha256":"76754a2898b502f125b665697f641529035fd587cf2d0ae96cdd275c8cb471e1","schema_version":"1.0","event_id":"sha256:76754a2898b502f125b665697f641529035fd587cf2d0ae96cdd275c8cb471e1"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/MPXB44CX2A4TBA7E7RCVS3IL55/bundle.json","state_url":"https://pith.science/pith/MPXB44CX2A4TBA7E7RCVS3IL55/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/MPXB44CX2A4TBA7E7RCVS3IL55/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":"2026-06-23T15:06:20Z","links":{"resolver":"https://pith.science/pith/MPXB44CX2A4TBA7E7RCVS3IL55","bundle":"https://pith.science/pith/MPXB44CX2A4TBA7E7RCVS3IL55/bundle.json","state":"https://pith.science/pith/MPXB44CX2A4TBA7E7RCVS3IL55/state.json","well_known_bundle":"https://pith.science/.well-known/pith/MPXB44CX2A4TBA7E7RCVS3IL55/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:MPXB44CX2A4TBA7E7RCVS3IL55","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":"1c60af56dad126d30e2ad825961563a892117343dc4792ff5b02c8cd08bd8d4b","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2018-02-25T11:08:41Z","title_canon_sha256":"2dced066d9d378d32449c8521b401c5aac7560d2d64c0bcdeafa27a26549e352"},"schema_version":"1.0","source":{"id":"1802.08985","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1802.08985","created_at":"2026-05-18T00:15:27Z"},{"alias_kind":"arxiv_version","alias_value":"1802.08985v3","created_at":"2026-05-18T00:15:27Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1802.08985","created_at":"2026-05-18T00:15:27Z"},{"alias_kind":"pith_short_12","alias_value":"MPXB44CX2A4T","created_at":"2026-05-18T12:32:40Z"},{"alias_kind":"pith_short_16","alias_value":"MPXB44CX2A4TBA7E","created_at":"2026-05-18T12:32:40Z"},{"alias_kind":"pith_short_8","alias_value":"MPXB44CX","created_at":"2026-05-18T12:32:40Z"}],"graph_snapshots":[{"event_id":"sha256:76754a2898b502f125b665697f641529035fd587cf2d0ae96cdd275c8cb471e1","target":"graph","created_at":"2026-05-18T00:15:27Z","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":"Experimentally, it is known that lithium undergoes a metal to semiconductor transition at about 80 GPA and a reentrant semiconductor to metal transition near 120 GPA. This unusual behaviour has been attributed to the formation of high-pressure electrides in the Li-\\textit{Aba}2 phase. Using the accurate wave function based quantum Monte Carlo (DMC) method, we show that the valence charge distribution of the Li-\\textit{Aba}2 phase is incompatible with an insulating or semiconducting ground state. At DMC level, the most stable phase at 100 GPA is an orthorhombic oP24 structure with Pbca symmetry","authors_text":"Gonzalo Guti\\'errez, Mauricio A. Flores","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2018-02-25T11:08:41Z","title":"Origin of the anomalous semiconducting behaviour in dense lithium"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1802.08985","kind":"arxiv","version":3},"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":"sha256:51f0a3c14d357d8aac869826f407267e00cff61a51648de6cee69f9ac714e11a","target":"record","created_at":"2026-05-18T00:15:27Z","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":"1c60af56dad126d30e2ad825961563a892117343dc4792ff5b02c8cd08bd8d4b","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2018-02-25T11:08:41Z","title_canon_sha256":"2dced066d9d378d32449c8521b401c5aac7560d2d64c0bcdeafa27a26549e352"},"schema_version":"1.0","source":{"id":"1802.08985","kind":"arxiv","version":3}},"canonical_sha256":"63ee1e7057d0393083e4fc45596d0bef71743dfa0b4e978891f8256cd6059a92","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"63ee1e7057d0393083e4fc45596d0bef71743dfa0b4e978891f8256cd6059a92","first_computed_at":"2026-05-18T00:15:27.981797Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:15:27.981797Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"r/S4JDh9k0tHJDAVTI+YdS1jiKJDINr13ABoWKiM05Bayj6K2zdYGaae2aZXLe4F863jKQ7Q3q70kJor1HCADA==","signature_status":"signed_v1","signed_at":"2026-05-18T00:15:27.982436Z","signed_message":"canonical_sha256_bytes"},"source_id":"1802.08985","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:51f0a3c14d357d8aac869826f407267e00cff61a51648de6cee69f9ac714e11a","sha256:76754a2898b502f125b665697f641529035fd587cf2d0ae96cdd275c8cb471e1"],"state_sha256":"cd7c7369b082697df9d0c86d9669f39b6faa5e98e770a26c7f35decd858ee0cf"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"DljDyBMo/dkPSMscMFLbwIMESLMoEWbEpdF38v8NradivklAIMTYPM2J5T4NExxmQfLFkiWqDK4bY6fNZoEDCw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-23T15:06:20.087614Z","bundle_sha256":"9ec72789a954e55a3f89e0e4f8f01248731ae670441aa4a9a1c931ebeab5b704"}}