{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2009:Z5B7KWIU6BRCKBQTD3WBA542PZ","short_pith_number":"pith:Z5B7KWIU","canonical_record":{"source":{"id":"0909.2002","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2009-09-10T17:47:36Z","cross_cats_sorted":["cond-mat.supr-con"],"title_canon_sha256":"932c5856236648aed2b1cd28f8d9b63900b88a27bfbd994a7595d83ee8c1c7c3","abstract_canon_sha256":"39edde8bd774729e58bcc1caa23426d4f20233bf312028daff6f9f4d6e480f0c"},"schema_version":"1.0"},"canonical_sha256":"cf43f55914f0622506131eec10779a7e72b80c655cd4803cfe7fb20981ab2ebd","source":{"kind":"arxiv","id":"0909.2002","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0909.2002","created_at":"2026-05-18T02:11:57Z"},{"alias_kind":"arxiv_version","alias_value":"0909.2002v1","created_at":"2026-05-18T02:11:57Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0909.2002","created_at":"2026-05-18T02:11:57Z"},{"alias_kind":"pith_short_12","alias_value":"Z5B7KWIU6BRC","created_at":"2026-05-18T12:26:02Z"},{"alias_kind":"pith_short_16","alias_value":"Z5B7KWIU6BRCKBQT","created_at":"2026-05-18T12:26:02Z"},{"alias_kind":"pith_short_8","alias_value":"Z5B7KWIU","created_at":"2026-05-18T12:26:02Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2009:Z5B7KWIU6BRCKBQTD3WBA542PZ","target":"record","payload":{"canonical_record":{"source":{"id":"0909.2002","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2009-09-10T17:47:36Z","cross_cats_sorted":["cond-mat.supr-con"],"title_canon_sha256":"932c5856236648aed2b1cd28f8d9b63900b88a27bfbd994a7595d83ee8c1c7c3","abstract_canon_sha256":"39edde8bd774729e58bcc1caa23426d4f20233bf312028daff6f9f4d6e480f0c"},"schema_version":"1.0"},"canonical_sha256":"cf43f55914f0622506131eec10779a7e72b80c655cd4803cfe7fb20981ab2ebd","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:11:57.363593Z","signature_b64":"g7UHTHgGLvwWIyMOlSNT1mD8wu0Vkvqaggvc7cHZYvKOK+IfqajWaygR8yAq2QA2K51MryeqEj8X7vw6vv92BA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"cf43f55914f0622506131eec10779a7e72b80c655cd4803cfe7fb20981ab2ebd","last_reissued_at":"2026-05-18T02:11:57.362794Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:11:57.362794Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0909.2002","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":"2026-05-18T02:11:57Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"d79/chUgcMFApcGS+mSrirwYCwR608NIOu2oKp16VuZGpiqKl//2w+RlhtF5fWZoiWaRmQ7uNAlg3r6zCQH6Aw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T15:45:30.402715Z"},"content_sha256":"7d55903e5b3303a7def07a7adc1283143079c2166e418a98ca1e49e036aa035a","schema_version":"1.0","event_id":"sha256:7d55903e5b3303a7def07a7adc1283143079c2166e418a98ca1e49e036aa035a"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2009:Z5B7KWIU6BRCKBQTD3WBA542PZ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Lattice collapse and the magnetic phase diagram of Sr$_{1-x}$Ca$_x$Co$_2$P$_2$","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.supr-con"],"primary_cat":"cond-mat.str-el","authors_text":"A. J. Williams, P. W. Stephens, R. J. Cava, Shuang Jia","submitted_at":"2009-09-10T17:47:36Z","abstract_excerpt":"We report that the 122 type Sr$_{1-x}$Ca$_x$Co$_2$P$_2$ solid solution undergoes an anomalous structural transition from the uncollapsed to the collapsed ThCr$_2$Si$_2$ structure at a distinct onset composition near $x=0.5$. Correlated with the structural changes, the electronic system evolves from a nearly ferromagnetic Fermi liquid to an antiferromagnetic metal, through a complex crossover regime. The structural collapse, driven by P-P bonding across the (Sr,Ca) layers, is much more pronounced in this system than it is in the analogous Fe-based system, indicating a strong sensitivity of stru"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0909.2002","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":"2026-05-18T02:11:57Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"aojoJgEdU0YGhxroxwjduQ0OX5pBF3arTj0fEwzDUXONMagCWSlNERa4KnBK90uI2ApBio4Vw45AvNw1/fT3Dw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T15:45:30.403426Z"},"content_sha256":"f882a0d302d2f4d454b8a5e319eaa91ec4f53c65ea0f7e2c87d6865faf5a1712","schema_version":"1.0","event_id":"sha256:f882a0d302d2f4d454b8a5e319eaa91ec4f53c65ea0f7e2c87d6865faf5a1712"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/Z5B7KWIU6BRCKBQTD3WBA542PZ/bundle.json","state_url":"https://pith.science/pith/Z5B7KWIU6BRCKBQTD3WBA542PZ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/Z5B7KWIU6BRCKBQTD3WBA542PZ/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":"2026-05-25T15:45:30Z","links":{"resolver":"https://pith.science/pith/Z5B7KWIU6BRCKBQTD3WBA542PZ","bundle":"https://pith.science/pith/Z5B7KWIU6BRCKBQTD3WBA542PZ/bundle.json","state":"https://pith.science/pith/Z5B7KWIU6BRCKBQTD3WBA542PZ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/Z5B7KWIU6BRCKBQTD3WBA542PZ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2009:Z5B7KWIU6BRCKBQTD3WBA542PZ","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":"39edde8bd774729e58bcc1caa23426d4f20233bf312028daff6f9f4d6e480f0c","cross_cats_sorted":["cond-mat.supr-con"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2009-09-10T17:47:36Z","title_canon_sha256":"932c5856236648aed2b1cd28f8d9b63900b88a27bfbd994a7595d83ee8c1c7c3"},"schema_version":"1.0","source":{"id":"0909.2002","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0909.2002","created_at":"2026-05-18T02:11:57Z"},{"alias_kind":"arxiv_version","alias_value":"0909.2002v1","created_at":"2026-05-18T02:11:57Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0909.2002","created_at":"2026-05-18T02:11:57Z"},{"alias_kind":"pith_short_12","alias_value":"Z5B7KWIU6BRC","created_at":"2026-05-18T12:26:02Z"},{"alias_kind":"pith_short_16","alias_value":"Z5B7KWIU6BRCKBQT","created_at":"2026-05-18T12:26:02Z"},{"alias_kind":"pith_short_8","alias_value":"Z5B7KWIU","created_at":"2026-05-18T12:26:02Z"}],"graph_snapshots":[{"event_id":"sha256:f882a0d302d2f4d454b8a5e319eaa91ec4f53c65ea0f7e2c87d6865faf5a1712","target":"graph","created_at":"2026-05-18T02:11:57Z","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 report that the 122 type Sr$_{1-x}$Ca$_x$Co$_2$P$_2$ solid solution undergoes an anomalous structural transition from the uncollapsed to the collapsed ThCr$_2$Si$_2$ structure at a distinct onset composition near $x=0.5$. Correlated with the structural changes, the electronic system evolves from a nearly ferromagnetic Fermi liquid to an antiferromagnetic metal, through a complex crossover regime. The structural collapse, driven by P-P bonding across the (Sr,Ca) layers, is much more pronounced in this system than it is in the analogous Fe-based system, indicating a strong sensitivity of stru","authors_text":"A. J. Williams, P. W. Stephens, R. J. Cava, Shuang Jia","cross_cats":["cond-mat.supr-con"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2009-09-10T17:47:36Z","title":"Lattice collapse and the magnetic phase diagram of Sr$_{1-x}$Ca$_x$Co$_2$P$_2$"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0909.2002","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":"sha256:7d55903e5b3303a7def07a7adc1283143079c2166e418a98ca1e49e036aa035a","target":"record","created_at":"2026-05-18T02:11:57Z","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":"39edde8bd774729e58bcc1caa23426d4f20233bf312028daff6f9f4d6e480f0c","cross_cats_sorted":["cond-mat.supr-con"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2009-09-10T17:47:36Z","title_canon_sha256":"932c5856236648aed2b1cd28f8d9b63900b88a27bfbd994a7595d83ee8c1c7c3"},"schema_version":"1.0","source":{"id":"0909.2002","kind":"arxiv","version":1}},"canonical_sha256":"cf43f55914f0622506131eec10779a7e72b80c655cd4803cfe7fb20981ab2ebd","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"cf43f55914f0622506131eec10779a7e72b80c655cd4803cfe7fb20981ab2ebd","first_computed_at":"2026-05-18T02:11:57.362794Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:11:57.362794Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"g7UHTHgGLvwWIyMOlSNT1mD8wu0Vkvqaggvc7cHZYvKOK+IfqajWaygR8yAq2QA2K51MryeqEj8X7vw6vv92BA==","signature_status":"signed_v1","signed_at":"2026-05-18T02:11:57.363593Z","signed_message":"canonical_sha256_bytes"},"source_id":"0909.2002","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:7d55903e5b3303a7def07a7adc1283143079c2166e418a98ca1e49e036aa035a","sha256:f882a0d302d2f4d454b8a5e319eaa91ec4f53c65ea0f7e2c87d6865faf5a1712"],"state_sha256":"0fb74af17a8178be8fc6e2e45b071a0e25e6d16218a18032fc23b457cb7786c0"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"pJ0+dhxdsFmsF89L5hAbbsbiLJF/flrKVHHb4UfBSyVjk1iuaLeEaqwHn+hAWlYAlrFJwvjc0ug2wRU7rpxpDA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-25T15:45:30.407259Z","bundle_sha256":"f2bbd7a4564e08d4b1a66c0d62db6c5fd94e39bf4087dffa3fe84708d14df23c"}}