{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2007:RRQVSZPNLRQPSIY4NDPL4IRU42","short_pith_number":"pith:RRQVSZPN","canonical_record":{"source":{"id":"0712.1432","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"cond-mat.mes-hall","submitted_at":"2007-12-10T11:00:15Z","cross_cats_sorted":[],"title_canon_sha256":"a5ebca1b8f868a6cd38bc2f4f1494cb67bc98d2094909b63e87b5fa092c82049","abstract_canon_sha256":"e3c81711337bbad3c635eb15a7f2d6ce5178e04bdea8d10772203de8fb2ba059"},"schema_version":"1.0"},"canonical_sha256":"8c615965ed5c60f9231c68debe2234e69793a9e4d50ec93e56bff13616adc3d5","source":{"kind":"arxiv","id":"0712.1432","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0712.1432","created_at":"2026-07-04T15:06:09Z"},{"alias_kind":"arxiv_version","alias_value":"0712.1432v1","created_at":"2026-07-04T15:06:09Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0712.1432","created_at":"2026-07-04T15:06:09Z"},{"alias_kind":"pith_short_12","alias_value":"RRQVSZPNLRQP","created_at":"2026-07-04T15:06:09Z"},{"alias_kind":"pith_short_16","alias_value":"RRQVSZPNLRQPSIY4","created_at":"2026-07-04T15:06:09Z"},{"alias_kind":"pith_short_8","alias_value":"RRQVSZPN","created_at":"2026-07-04T15:06:09Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2007:RRQVSZPNLRQPSIY4NDPL4IRU42","target":"record","payload":{"canonical_record":{"source":{"id":"0712.1432","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"cond-mat.mes-hall","submitted_at":"2007-12-10T11:00:15Z","cross_cats_sorted":[],"title_canon_sha256":"a5ebca1b8f868a6cd38bc2f4f1494cb67bc98d2094909b63e87b5fa092c82049","abstract_canon_sha256":"e3c81711337bbad3c635eb15a7f2d6ce5178e04bdea8d10772203de8fb2ba059"},"schema_version":"1.0"},"canonical_sha256":"8c615965ed5c60f9231c68debe2234e69793a9e4d50ec93e56bff13616adc3d5","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T15:06:09.451642Z","signature_b64":"OLY0RAOlxK75e+tQ77kC28mc6H6ph8Sp9ESsbYqPI5Y7O1O7iHF7ZmBFDq188nUQQ1BPkOUnYtHCkUVMnqBmCw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"8c615965ed5c60f9231c68debe2234e69793a9e4d50ec93e56bff13616adc3d5","last_reissued_at":"2026-07-04T15:06:09.451260Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T15:06:09.451260Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0712.1432","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":"2026-07-04T15:06:09Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"CXD1NgUgjAUkoGLG0jo8R8gOVS58k1MQSoOdBM8YRYLcHFi029Cr7QW6XyQWmHgTP+dQscGG6koAqxNH0o7FDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-06T11:48:34.827472Z"},"content_sha256":"60957b2878b66c664e480f3d0f44f191dd56be1a914077bb8f562652826186d1","schema_version":"1.0","event_id":"sha256:60957b2878b66c664e480f3d0f44f191dd56be1a914077bb8f562652826186d1"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2007:RRQVSZPNLRQPSIY4NDPL4IRU42","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Quantum well states in Fe/Nb(001) multilayers: First principles study","license":"","headline":"","cross_cats":[],"primary_cat":"cond-mat.mes-hall","authors_text":"A. Sen, Nitya Nath Shukla, R. Prasad","submitted_at":"2007-12-10T11:00:15Z","abstract_excerpt":"We present a first-principles study to understand the phenomena of interlayer exchange coupling in Fe/Nb multilayers using the linearized-muffin-tin-orbitals method within the generalized gradient approximation. We find that the exchange coupling oscillates with both short and long periodicities, which have been examined in terms of the Ruderman-Kittel-Kasuya-Yosida (RKKY) model as well as the quantum well (QW) model. We have investigated the behavior of the exchange coupling by artificially varying moments of Fe atoms in ferromagnetic layers. For a small moment of Fe, the coupling shows bilin"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0712.1432","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/0712.1432/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2026-07-04T15:06:09Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"bJF8a1/gx4V+lsYhxwlPrZz1cRTh6p8U7JisuhJTSIKt8PTIvfRQzRbg7AAFbEKssoWhy1gD0W4c0McYmPELCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-06T11:48:34.828005Z"},"content_sha256":"a9f759ca6f2c24c828358a9f687241ad3d7db9df75c9b888f8386f85dfce3f84","schema_version":"1.0","event_id":"sha256:a9f759ca6f2c24c828358a9f687241ad3d7db9df75c9b888f8386f85dfce3f84"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/RRQVSZPNLRQPSIY4NDPL4IRU42/bundle.json","state_url":"https://pith.science/pith/RRQVSZPNLRQPSIY4NDPL4IRU42/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/RRQVSZPNLRQPSIY4NDPL4IRU42/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":"2026-08-06T11:48:34Z","links":{"resolver":"https://pith.science/pith/RRQVSZPNLRQPSIY4NDPL4IRU42","bundle":"https://pith.science/pith/RRQVSZPNLRQPSIY4NDPL4IRU42/bundle.json","state":"https://pith.science/pith/RRQVSZPNLRQPSIY4NDPL4IRU42/state.json","well_known_bundle":"https://pith.science/.well-known/pith/RRQVSZPNLRQPSIY4NDPL4IRU42/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2007:RRQVSZPNLRQPSIY4NDPL4IRU42","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":"e3c81711337bbad3c635eb15a7f2d6ce5178e04bdea8d10772203de8fb2ba059","cross_cats_sorted":[],"license":"","primary_cat":"cond-mat.mes-hall","submitted_at":"2007-12-10T11:00:15Z","title_canon_sha256":"a5ebca1b8f868a6cd38bc2f4f1494cb67bc98d2094909b63e87b5fa092c82049"},"schema_version":"1.0","source":{"id":"0712.1432","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0712.1432","created_at":"2026-07-04T15:06:09Z"},{"alias_kind":"arxiv_version","alias_value":"0712.1432v1","created_at":"2026-07-04T15:06:09Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0712.1432","created_at":"2026-07-04T15:06:09Z"},{"alias_kind":"pith_short_12","alias_value":"RRQVSZPNLRQP","created_at":"2026-07-04T15:06:09Z"},{"alias_kind":"pith_short_16","alias_value":"RRQVSZPNLRQPSIY4","created_at":"2026-07-04T15:06:09Z"},{"alias_kind":"pith_short_8","alias_value":"RRQVSZPN","created_at":"2026-07-04T15:06:09Z"}],"graph_snapshots":[{"event_id":"sha256:a9f759ca6f2c24c828358a9f687241ad3d7db9df75c9b888f8386f85dfce3f84","target":"graph","created_at":"2026-07-04T15:06:09Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/0712.1432/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We present a first-principles study to understand the phenomena of interlayer exchange coupling in Fe/Nb multilayers using the linearized-muffin-tin-orbitals method within the generalized gradient approximation. We find that the exchange coupling oscillates with both short and long periodicities, which have been examined in terms of the Ruderman-Kittel-Kasuya-Yosida (RKKY) model as well as the quantum well (QW) model. We have investigated the behavior of the exchange coupling by artificially varying moments of Fe atoms in ferromagnetic layers. For a small moment of Fe, the coupling shows bilin","authors_text":"A. Sen, Nitya Nath Shukla, R. Prasad","cross_cats":[],"headline":"","license":"","primary_cat":"cond-mat.mes-hall","submitted_at":"2007-12-10T11:00:15Z","title":"Quantum well states in Fe/Nb(001) multilayers: First principles study"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0712.1432","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":"sha256:60957b2878b66c664e480f3d0f44f191dd56be1a914077bb8f562652826186d1","target":"record","created_at":"2026-07-04T15:06:09Z","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":"e3c81711337bbad3c635eb15a7f2d6ce5178e04bdea8d10772203de8fb2ba059","cross_cats_sorted":[],"license":"","primary_cat":"cond-mat.mes-hall","submitted_at":"2007-12-10T11:00:15Z","title_canon_sha256":"a5ebca1b8f868a6cd38bc2f4f1494cb67bc98d2094909b63e87b5fa092c82049"},"schema_version":"1.0","source":{"id":"0712.1432","kind":"arxiv","version":1}},"canonical_sha256":"8c615965ed5c60f9231c68debe2234e69793a9e4d50ec93e56bff13616adc3d5","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"8c615965ed5c60f9231c68debe2234e69793a9e4d50ec93e56bff13616adc3d5","first_computed_at":"2026-07-04T15:06:09.451260Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T15:06:09.451260Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"OLY0RAOlxK75e+tQ77kC28mc6H6ph8Sp9ESsbYqPI5Y7O1O7iHF7ZmBFDq188nUQQ1BPkOUnYtHCkUVMnqBmCw==","signature_status":"signed_v1","signed_at":"2026-07-04T15:06:09.451642Z","signed_message":"canonical_sha256_bytes"},"source_id":"0712.1432","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:60957b2878b66c664e480f3d0f44f191dd56be1a914077bb8f562652826186d1","sha256:a9f759ca6f2c24c828358a9f687241ad3d7db9df75c9b888f8386f85dfce3f84"],"state_sha256":"607a1a253a8a622d05befd860e58ddeb33379afa48b297393670d3e284df6df2"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"8p2N6Y3VKy2cQPapOVd1jsSjm1Nu/1iqg+A6/WbOn+bLMbCmmJj5ivjytaZ2LJNYVCCzyiJvLah8ayn33g4oCg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-06T11:48:34.831671Z","bundle_sha256":"240cce7b8e301993f263b0c315942ae34ff9a1cbf268ac88a9b2b1472f53b41a"}}