{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:Z7LN7NWMLVYWX6TRYJPOQQMCNH","short_pith_number":"pith:Z7LN7NWM","canonical_record":{"source":{"id":"1502.00055","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2015-01-31T01:38:42Z","cross_cats_sorted":[],"title_canon_sha256":"f9e060af478f8447630a773b5cd4797723b88a54ec159e4b2157a886510bfcd1","abstract_canon_sha256":"292c37ca0f51ae9a36b7d08c99cd1db5dfe7f66147d4b64c9105555fb20d22eb"},"schema_version":"1.0"},"canonical_sha256":"cfd6dfb6cc5d716bfa71c25ee8418269ea59254f3fec65c94902427a6eb2796c","source":{"kind":"arxiv","id":"1502.00055","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1502.00055","created_at":"2026-05-18T01:34:24Z"},{"alias_kind":"arxiv_version","alias_value":"1502.00055v2","created_at":"2026-05-18T01:34:24Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1502.00055","created_at":"2026-05-18T01:34:24Z"},{"alias_kind":"pith_short_12","alias_value":"Z7LN7NWMLVYW","created_at":"2026-05-18T12:29:52Z"},{"alias_kind":"pith_short_16","alias_value":"Z7LN7NWMLVYWX6TR","created_at":"2026-05-18T12:29:52Z"},{"alias_kind":"pith_short_8","alias_value":"Z7LN7NWM","created_at":"2026-05-18T12:29:52Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:Z7LN7NWMLVYWX6TRYJPOQQMCNH","target":"record","payload":{"canonical_record":{"source":{"id":"1502.00055","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2015-01-31T01:38:42Z","cross_cats_sorted":[],"title_canon_sha256":"f9e060af478f8447630a773b5cd4797723b88a54ec159e4b2157a886510bfcd1","abstract_canon_sha256":"292c37ca0f51ae9a36b7d08c99cd1db5dfe7f66147d4b64c9105555fb20d22eb"},"schema_version":"1.0"},"canonical_sha256":"cfd6dfb6cc5d716bfa71c25ee8418269ea59254f3fec65c94902427a6eb2796c","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:34:24.758743Z","signature_b64":"LUHHBkQypw+qzHC/Rj6oJFr7Et8nIJxpKuysHYaU9Jv4OFVZaqwTkTJvYYOKkiMUr09AY05eb/gdPZcrP7xOBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"cfd6dfb6cc5d716bfa71c25ee8418269ea59254f3fec65c94902427a6eb2796c","last_reissued_at":"2026-05-18T01:34:24.758269Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:34:24.758269Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1502.00055","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":"2026-05-18T01:34:24Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"BMdS4lwRxOC/VI21tlOa7Fd5Mgmpj9cid4X1gZde3BNTT+JBUr1HonC3P6rv7Fqor+BcZjzpXRL75Hc1BlmsCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T16:13:25.767798Z"},"content_sha256":"1c5d8d987100b27c3f31c7a3a7fafbf5fc37d0f04d7385c49c5c95c67314510d","schema_version":"1.0","event_id":"sha256:1c5d8d987100b27c3f31c7a3a7fafbf5fc37d0f04d7385c49c5c95c67314510d"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:Z7LN7NWMLVYWX6TRYJPOQQMCNH","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Calculation of the specific heat of optimally K-doped BaFe$_2$As$_2$","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.supr-con","authors_text":"Hyungju Oh, Marvin L. Cohen, Sinisa Coh","submitted_at":"2015-01-31T01:38:42Z","abstract_excerpt":"The calculated specific heat of optimally K-doped BaFe$_2$As$_2$ in density functional theory is about five times smaller than that found in the experiment. We report that by adjusting the potential on the iron atom to be slightly more repulsive for electrons improves the calculated heat capacity as well as the structural, magnetic, and electronic properties of Ba$_{0.6}$K$_{0.4}$Fe$_2$As$_2$. Applying the same correction to the antiferromagnetic state, we find that the electron-phonon coupling is strongly enhanced."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1502.00055","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":"2026-05-18T01:34:24Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"90CqVZ3De+QxawgSzb9e1VNvcb6tcPusZfJwjynN463CduhHaCozxYxKDd1mJOMLp5zicVAsG1ytsrfAkS3qDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T16:13:25.768147Z"},"content_sha256":"15125a9c3adfbe87d1214ac5d5613e704a0cf3a7ce03563ae8bb279662e255cd","schema_version":"1.0","event_id":"sha256:15125a9c3adfbe87d1214ac5d5613e704a0cf3a7ce03563ae8bb279662e255cd"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/Z7LN7NWMLVYWX6TRYJPOQQMCNH/bundle.json","state_url":"https://pith.science/pith/Z7LN7NWMLVYWX6TRYJPOQQMCNH/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/Z7LN7NWMLVYWX6TRYJPOQQMCNH/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":"2026-06-03T16:13:25Z","links":{"resolver":"https://pith.science/pith/Z7LN7NWMLVYWX6TRYJPOQQMCNH","bundle":"https://pith.science/pith/Z7LN7NWMLVYWX6TRYJPOQQMCNH/bundle.json","state":"https://pith.science/pith/Z7LN7NWMLVYWX6TRYJPOQQMCNH/state.json","well_known_bundle":"https://pith.science/.well-known/pith/Z7LN7NWMLVYWX6TRYJPOQQMCNH/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:Z7LN7NWMLVYWX6TRYJPOQQMCNH","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":"292c37ca0f51ae9a36b7d08c99cd1db5dfe7f66147d4b64c9105555fb20d22eb","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2015-01-31T01:38:42Z","title_canon_sha256":"f9e060af478f8447630a773b5cd4797723b88a54ec159e4b2157a886510bfcd1"},"schema_version":"1.0","source":{"id":"1502.00055","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1502.00055","created_at":"2026-05-18T01:34:24Z"},{"alias_kind":"arxiv_version","alias_value":"1502.00055v2","created_at":"2026-05-18T01:34:24Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1502.00055","created_at":"2026-05-18T01:34:24Z"},{"alias_kind":"pith_short_12","alias_value":"Z7LN7NWMLVYW","created_at":"2026-05-18T12:29:52Z"},{"alias_kind":"pith_short_16","alias_value":"Z7LN7NWMLVYWX6TR","created_at":"2026-05-18T12:29:52Z"},{"alias_kind":"pith_short_8","alias_value":"Z7LN7NWM","created_at":"2026-05-18T12:29:52Z"}],"graph_snapshots":[{"event_id":"sha256:15125a9c3adfbe87d1214ac5d5613e704a0cf3a7ce03563ae8bb279662e255cd","target":"graph","created_at":"2026-05-18T01:34:24Z","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":"The calculated specific heat of optimally K-doped BaFe$_2$As$_2$ in density functional theory is about five times smaller than that found in the experiment. We report that by adjusting the potential on the iron atom to be slightly more repulsive for electrons improves the calculated heat capacity as well as the structural, magnetic, and electronic properties of Ba$_{0.6}$K$_{0.4}$Fe$_2$As$_2$. Applying the same correction to the antiferromagnetic state, we find that the electron-phonon coupling is strongly enhanced.","authors_text":"Hyungju Oh, Marvin L. Cohen, Sinisa Coh","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2015-01-31T01:38:42Z","title":"Calculation of the specific heat of optimally K-doped BaFe$_2$As$_2$"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1502.00055","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":"sha256:1c5d8d987100b27c3f31c7a3a7fafbf5fc37d0f04d7385c49c5c95c67314510d","target":"record","created_at":"2026-05-18T01:34:24Z","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":"292c37ca0f51ae9a36b7d08c99cd1db5dfe7f66147d4b64c9105555fb20d22eb","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2015-01-31T01:38:42Z","title_canon_sha256":"f9e060af478f8447630a773b5cd4797723b88a54ec159e4b2157a886510bfcd1"},"schema_version":"1.0","source":{"id":"1502.00055","kind":"arxiv","version":2}},"canonical_sha256":"cfd6dfb6cc5d716bfa71c25ee8418269ea59254f3fec65c94902427a6eb2796c","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"cfd6dfb6cc5d716bfa71c25ee8418269ea59254f3fec65c94902427a6eb2796c","first_computed_at":"2026-05-18T01:34:24.758269Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:34:24.758269Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"LUHHBkQypw+qzHC/Rj6oJFr7Et8nIJxpKuysHYaU9Jv4OFVZaqwTkTJvYYOKkiMUr09AY05eb/gdPZcrP7xOBQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:34:24.758743Z","signed_message":"canonical_sha256_bytes"},"source_id":"1502.00055","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:1c5d8d987100b27c3f31c7a3a7fafbf5fc37d0f04d7385c49c5c95c67314510d","sha256:15125a9c3adfbe87d1214ac5d5613e704a0cf3a7ce03563ae8bb279662e255cd"],"state_sha256":"3e3a23f904f0f700aab376212c16abe1315b825932643a91085c4c01fafb7d56"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"KaermpLvL03r/8uinphkBwuFNPIEy2dvBOWU3/WA5SEw5JWVoVeikgaRM9m2U5IYLXohD1VU4YI632js/t5wAQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-03T16:13:25.770109Z","bundle_sha256":"7d949c5411df55e1c411ddc049636dd52bad292dcf65005b7cfead31f6f48539"}}