{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:KJQH6J62TODTUSKMZ6FQ4QWNUI","short_pith_number":"pith:KJQH6J62","canonical_record":{"source":{"id":"1509.01422","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2015-09-04T12:11:03Z","cross_cats_sorted":["cond-mat.str-el"],"title_canon_sha256":"6559c28280af1331539c8f7477ff79ba821b605e70c3c95c5d92dcab470f6a86","abstract_canon_sha256":"3297daa909a049f58cc74355172649f829073f03d08874edeb43c17ecac1560c"},"schema_version":"1.0"},"canonical_sha256":"52607f27da9b873a494ccf8b0e42cda20b604d5ea6094c8d20aa0db820ce36b0","source":{"kind":"arxiv","id":"1509.01422","version":3},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1509.01422","created_at":"2026-05-18T01:26:09Z"},{"alias_kind":"arxiv_version","alias_value":"1509.01422v3","created_at":"2026-05-18T01:26:09Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1509.01422","created_at":"2026-05-18T01:26:09Z"},{"alias_kind":"pith_short_12","alias_value":"KJQH6J62TODT","created_at":"2026-05-18T12:29:29Z"},{"alias_kind":"pith_short_16","alias_value":"KJQH6J62TODTUSKM","created_at":"2026-05-18T12:29:29Z"},{"alias_kind":"pith_short_8","alias_value":"KJQH6J62","created_at":"2026-05-18T12:29:29Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:KJQH6J62TODTUSKMZ6FQ4QWNUI","target":"record","payload":{"canonical_record":{"source":{"id":"1509.01422","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2015-09-04T12:11:03Z","cross_cats_sorted":["cond-mat.str-el"],"title_canon_sha256":"6559c28280af1331539c8f7477ff79ba821b605e70c3c95c5d92dcab470f6a86","abstract_canon_sha256":"3297daa909a049f58cc74355172649f829073f03d08874edeb43c17ecac1560c"},"schema_version":"1.0"},"canonical_sha256":"52607f27da9b873a494ccf8b0e42cda20b604d5ea6094c8d20aa0db820ce36b0","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:26:09.589960Z","signature_b64":"Ks3f98BHUZWuk+TTBG3Xv7fLdQGjaHoIbiXGh2N+eeE9Wx3jPpC6AFepuRIU1oXQ7lavMEYZP7MY/exnbPooBA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"52607f27da9b873a494ccf8b0e42cda20b604d5ea6094c8d20aa0db820ce36b0","last_reissued_at":"2026-05-18T01:26:09.589390Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:26:09.589390Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1509.01422","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":"2026-05-18T01:26:09Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"vxJluVHSOGAWvUGn4BkHrt0NYc6TOvEMOl3occn2J76ntF+uYexUVLXrNHL5YA8UOxHrGkEq2uxTfICMsIeWAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-20T03:04:02.446001Z"},"content_sha256":"99f65d8b1757c266ab7d5a1e11d6f887186c740806bc21c2796a475f22b9e9f1","schema_version":"1.0","event_id":"sha256:99f65d8b1757c266ab7d5a1e11d6f887186c740806bc21c2796a475f22b9e9f1"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:KJQH6J62TODTUSKMZ6FQ4QWNUI","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Theory of Curie temperature enhancement in electron-doped EuO","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.str-el"],"primary_cat":"cond-mat.mtrl-sci","authors_text":"Johann Kroha (University of Bonn), Tobias Stollenwerk","submitted_at":"2015-09-04T12:11:03Z","abstract_excerpt":"We present a comparative, theoretical study of the doping dependence of the critical temperature $T_C$ of the ferromagnetic insulator-metal transition in Gd-doped and O-deficient EuO, respectively. The strong $T_C$ enhancement in Eu$_{1-x}$Gd$_x$O is due to Kondo-like spin fluctuations on the Gd sites, which are absent in EuO$_{1-x}$. Moreover, we find that the $T_C$ saturation in Eu$_{1-x}$Gd$_x$O for large $x$ is due to a reduced activation of dopant electrons into the conduction band, in agreement with experiments, rather than antiferromagnetic long-range contributions of the RKKY interacti"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1509.01422","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":"2026-05-18T01:26:09Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"kCtVVT0Es6RXi1hVIBXy441zhwIZWS0M81V2CyRgvY846Tla6exakgapk0lYbCyp+Z+FlqhUr1oBkyEqzSZYBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-20T03:04:02.446376Z"},"content_sha256":"cf074264c0332933c5a19368db8cd2aa3a4a1dda69346ebb7c75b322c8a945a6","schema_version":"1.0","event_id":"sha256:cf074264c0332933c5a19368db8cd2aa3a4a1dda69346ebb7c75b322c8a945a6"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/KJQH6J62TODTUSKMZ6FQ4QWNUI/bundle.json","state_url":"https://pith.science/pith/KJQH6J62TODTUSKMZ6FQ4QWNUI/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/KJQH6J62TODTUSKMZ6FQ4QWNUI/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":"2026-06-20T03:04:02Z","links":{"resolver":"https://pith.science/pith/KJQH6J62TODTUSKMZ6FQ4QWNUI","bundle":"https://pith.science/pith/KJQH6J62TODTUSKMZ6FQ4QWNUI/bundle.json","state":"https://pith.science/pith/KJQH6J62TODTUSKMZ6FQ4QWNUI/state.json","well_known_bundle":"https://pith.science/.well-known/pith/KJQH6J62TODTUSKMZ6FQ4QWNUI/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:KJQH6J62TODTUSKMZ6FQ4QWNUI","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":"3297daa909a049f58cc74355172649f829073f03d08874edeb43c17ecac1560c","cross_cats_sorted":["cond-mat.str-el"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2015-09-04T12:11:03Z","title_canon_sha256":"6559c28280af1331539c8f7477ff79ba821b605e70c3c95c5d92dcab470f6a86"},"schema_version":"1.0","source":{"id":"1509.01422","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1509.01422","created_at":"2026-05-18T01:26:09Z"},{"alias_kind":"arxiv_version","alias_value":"1509.01422v3","created_at":"2026-05-18T01:26:09Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1509.01422","created_at":"2026-05-18T01:26:09Z"},{"alias_kind":"pith_short_12","alias_value":"KJQH6J62TODT","created_at":"2026-05-18T12:29:29Z"},{"alias_kind":"pith_short_16","alias_value":"KJQH6J62TODTUSKM","created_at":"2026-05-18T12:29:29Z"},{"alias_kind":"pith_short_8","alias_value":"KJQH6J62","created_at":"2026-05-18T12:29:29Z"}],"graph_snapshots":[{"event_id":"sha256:cf074264c0332933c5a19368db8cd2aa3a4a1dda69346ebb7c75b322c8a945a6","target":"graph","created_at":"2026-05-18T01:26:09Z","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"},"paper":{"abstract_excerpt":"We present a comparative, theoretical study of the doping dependence of the critical temperature $T_C$ of the ferromagnetic insulator-metal transition in Gd-doped and O-deficient EuO, respectively. The strong $T_C$ enhancement in Eu$_{1-x}$Gd$_x$O is due to Kondo-like spin fluctuations on the Gd sites, which are absent in EuO$_{1-x}$. Moreover, we find that the $T_C$ saturation in Eu$_{1-x}$Gd$_x$O for large $x$ is due to a reduced activation of dopant electrons into the conduction band, in agreement with experiments, rather than antiferromagnetic long-range contributions of the RKKY interacti","authors_text":"Johann Kroha (University of Bonn), Tobias Stollenwerk","cross_cats":["cond-mat.str-el"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2015-09-04T12:11:03Z","title":"Theory of Curie temperature enhancement in electron-doped EuO"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1509.01422","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":"sha256:99f65d8b1757c266ab7d5a1e11d6f887186c740806bc21c2796a475f22b9e9f1","target":"record","created_at":"2026-05-18T01:26:09Z","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":"3297daa909a049f58cc74355172649f829073f03d08874edeb43c17ecac1560c","cross_cats_sorted":["cond-mat.str-el"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2015-09-04T12:11:03Z","title_canon_sha256":"6559c28280af1331539c8f7477ff79ba821b605e70c3c95c5d92dcab470f6a86"},"schema_version":"1.0","source":{"id":"1509.01422","kind":"arxiv","version":3}},"canonical_sha256":"52607f27da9b873a494ccf8b0e42cda20b604d5ea6094c8d20aa0db820ce36b0","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"52607f27da9b873a494ccf8b0e42cda20b604d5ea6094c8d20aa0db820ce36b0","first_computed_at":"2026-05-18T01:26:09.589390Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:26:09.589390Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Ks3f98BHUZWuk+TTBG3Xv7fLdQGjaHoIbiXGh2N+eeE9Wx3jPpC6AFepuRIU1oXQ7lavMEYZP7MY/exnbPooBA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:26:09.589960Z","signed_message":"canonical_sha256_bytes"},"source_id":"1509.01422","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:99f65d8b1757c266ab7d5a1e11d6f887186c740806bc21c2796a475f22b9e9f1","sha256:cf074264c0332933c5a19368db8cd2aa3a4a1dda69346ebb7c75b322c8a945a6"],"state_sha256":"fcf1c5bb5d0cad0282d67fdf700c1194aa5309786f5ce721253569105267ad48"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"IOFpFIc/QFiFiKIF8I0o7i5ulT8IYQH6leuNaizHyeS0XqRsWtZGeYCMWnKAN7pRtaIhW7ry21MezLNYNOAJDQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-20T03:04:02.448234Z","bundle_sha256":"70d59a2f9d1dc898d5e0e5c46e45b55381c44b70a123939382870b8b8bc64efd"}}