{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2010:TDESSR5YLDPXHZY6YDEC7PV24U","short_pith_number":"pith:TDESSR5Y","canonical_record":{"source":{"id":"1005.4986","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2010-05-27T05:31:39Z","cross_cats_sorted":[],"title_canon_sha256":"d6908e59d50e46636729b7eac13ce9f35b25bcca4af4532b81799966f53b8b00","abstract_canon_sha256":"efae099276c33a230e701e1aebdbd28b1935e12532cb953617030d41b8f4c096"},"schema_version":"1.0"},"canonical_sha256":"98c92947b858df73e71ec0c82fbebae51375cd114bd414a48fd649ae8c8a7f39","source":{"kind":"arxiv","id":"1005.4986","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1005.4986","created_at":"2026-05-18T02:07:07Z"},{"alias_kind":"arxiv_version","alias_value":"1005.4986v1","created_at":"2026-05-18T02:07:07Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1005.4986","created_at":"2026-05-18T02:07:07Z"},{"alias_kind":"pith_short_12","alias_value":"TDESSR5YLDPX","created_at":"2026-05-18T12:26:13Z"},{"alias_kind":"pith_short_16","alias_value":"TDESSR5YLDPXHZY6","created_at":"2026-05-18T12:26:13Z"},{"alias_kind":"pith_short_8","alias_value":"TDESSR5Y","created_at":"2026-05-18T12:26:13Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2010:TDESSR5YLDPXHZY6YDEC7PV24U","target":"record","payload":{"canonical_record":{"source":{"id":"1005.4986","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2010-05-27T05:31:39Z","cross_cats_sorted":[],"title_canon_sha256":"d6908e59d50e46636729b7eac13ce9f35b25bcca4af4532b81799966f53b8b00","abstract_canon_sha256":"efae099276c33a230e701e1aebdbd28b1935e12532cb953617030d41b8f4c096"},"schema_version":"1.0"},"canonical_sha256":"98c92947b858df73e71ec0c82fbebae51375cd114bd414a48fd649ae8c8a7f39","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:07:07.452343Z","signature_b64":"PZMOErXcexePJip61CDgYV86N5TV7euRrtIlJNAaqcI4khwxcHC5TRwUdQQv313Bt00vZVzOK/ya4hkCm7E1DA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"98c92947b858df73e71ec0c82fbebae51375cd114bd414a48fd649ae8c8a7f39","last_reissued_at":"2026-05-18T02:07:07.451735Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:07:07.451735Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1005.4986","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":"2026-05-18T02:07:07Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"M77rDcFUWQVCf7cKDmeMrkGU/odwjDjFSVcoOSOZQRLI+lMyPm/DKUqgKxEPNULirRBfvTJisEZv+9t7JqRvAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-05T12:11:23.436485Z"},"content_sha256":"9692387eebbbbc4520199bd70ae71a2a25ec3a0b6029e84f708377cb977b4dc2","schema_version":"1.0","event_id":"sha256:9692387eebbbbc4520199bd70ae71a2a25ec3a0b6029e84f708377cb977b4dc2"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2010:TDESSR5YLDPXHZY6YDEC7PV24U","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Ferroelectricity induced by spin-dependent metal-ligand hybridization in Ba$_2$CoGe$_2$O$_7$","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.str-el","authors_text":"H. Murakawa, N. Furukawa, S. Miyahara, Y. Onose, Y. Tokura","submitted_at":"2010-05-27T05:31:39Z","abstract_excerpt":"We have investigated the variation of induced ferroelectric polarization under magnetic field with various directions and magnitudes in a staggered antiferromagnet Ba$_2$CoGe$_2$O$_7$. While the ferroelectric polarization cannot be explained by the well-accepted spin current model nor exchange striction mechanism, we have shown that it is induced by the spin-dependent $p$-$d$ hybridization between the transition-metal (Co) and ligand (O) via the spin-orbit interaction. On the basis of the correspondence between the direction of electric polarization and the magnetic state, we have also demonst"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1005.4986","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":"2026-05-18T02:07:07Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"XInP6RjAxCIjwpl/GloSprbFXf9w/P121IU1nn57UuUyAgQZ8q0256usiVw2qbrrcHM2qru03v/rZDqGKPe1CA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-05T12:11:23.436822Z"},"content_sha256":"c840fe3711ce99f5793eb137323fcadf1415e6dbf8410f041a65cc41403edc67","schema_version":"1.0","event_id":"sha256:c840fe3711ce99f5793eb137323fcadf1415e6dbf8410f041a65cc41403edc67"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/TDESSR5YLDPXHZY6YDEC7PV24U/bundle.json","state_url":"https://pith.science/pith/TDESSR5YLDPXHZY6YDEC7PV24U/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/TDESSR5YLDPXHZY6YDEC7PV24U/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":"2026-06-05T12:11:23Z","links":{"resolver":"https://pith.science/pith/TDESSR5YLDPXHZY6YDEC7PV24U","bundle":"https://pith.science/pith/TDESSR5YLDPXHZY6YDEC7PV24U/bundle.json","state":"https://pith.science/pith/TDESSR5YLDPXHZY6YDEC7PV24U/state.json","well_known_bundle":"https://pith.science/.well-known/pith/TDESSR5YLDPXHZY6YDEC7PV24U/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2010:TDESSR5YLDPXHZY6YDEC7PV24U","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":"efae099276c33a230e701e1aebdbd28b1935e12532cb953617030d41b8f4c096","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2010-05-27T05:31:39Z","title_canon_sha256":"d6908e59d50e46636729b7eac13ce9f35b25bcca4af4532b81799966f53b8b00"},"schema_version":"1.0","source":{"id":"1005.4986","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1005.4986","created_at":"2026-05-18T02:07:07Z"},{"alias_kind":"arxiv_version","alias_value":"1005.4986v1","created_at":"2026-05-18T02:07:07Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1005.4986","created_at":"2026-05-18T02:07:07Z"},{"alias_kind":"pith_short_12","alias_value":"TDESSR5YLDPX","created_at":"2026-05-18T12:26:13Z"},{"alias_kind":"pith_short_16","alias_value":"TDESSR5YLDPXHZY6","created_at":"2026-05-18T12:26:13Z"},{"alias_kind":"pith_short_8","alias_value":"TDESSR5Y","created_at":"2026-05-18T12:26:13Z"}],"graph_snapshots":[{"event_id":"sha256:c840fe3711ce99f5793eb137323fcadf1415e6dbf8410f041a65cc41403edc67","target":"graph","created_at":"2026-05-18T02:07:07Z","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 have investigated the variation of induced ferroelectric polarization under magnetic field with various directions and magnitudes in a staggered antiferromagnet Ba$_2$CoGe$_2$O$_7$. While the ferroelectric polarization cannot be explained by the well-accepted spin current model nor exchange striction mechanism, we have shown that it is induced by the spin-dependent $p$-$d$ hybridization between the transition-metal (Co) and ligand (O) via the spin-orbit interaction. On the basis of the correspondence between the direction of electric polarization and the magnetic state, we have also demonst","authors_text":"H. Murakawa, N. Furukawa, S. Miyahara, Y. Onose, Y. Tokura","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2010-05-27T05:31:39Z","title":"Ferroelectricity induced by spin-dependent metal-ligand hybridization in Ba$_2$CoGe$_2$O$_7$"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1005.4986","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":"sha256:9692387eebbbbc4520199bd70ae71a2a25ec3a0b6029e84f708377cb977b4dc2","target":"record","created_at":"2026-05-18T02:07:07Z","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":"efae099276c33a230e701e1aebdbd28b1935e12532cb953617030d41b8f4c096","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2010-05-27T05:31:39Z","title_canon_sha256":"d6908e59d50e46636729b7eac13ce9f35b25bcca4af4532b81799966f53b8b00"},"schema_version":"1.0","source":{"id":"1005.4986","kind":"arxiv","version":1}},"canonical_sha256":"98c92947b858df73e71ec0c82fbebae51375cd114bd414a48fd649ae8c8a7f39","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"98c92947b858df73e71ec0c82fbebae51375cd114bd414a48fd649ae8c8a7f39","first_computed_at":"2026-05-18T02:07:07.451735Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:07:07.451735Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"PZMOErXcexePJip61CDgYV86N5TV7euRrtIlJNAaqcI4khwxcHC5TRwUdQQv313Bt00vZVzOK/ya4hkCm7E1DA==","signature_status":"signed_v1","signed_at":"2026-05-18T02:07:07.452343Z","signed_message":"canonical_sha256_bytes"},"source_id":"1005.4986","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:9692387eebbbbc4520199bd70ae71a2a25ec3a0b6029e84f708377cb977b4dc2","sha256:c840fe3711ce99f5793eb137323fcadf1415e6dbf8410f041a65cc41403edc67"],"state_sha256":"85de52fe540735d808b408e2f84a414e014507631de836e9eb132babdb98edd6"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"I+iip3Tt4De0hfDd1GJ/oPD8TDKWi8ZLj6NfCsCIdxal5DsIQmGoQw2sMjzsVPvgZujeKCUKEfHAH4MKh/YLBQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-05T12:11:23.438725Z","bundle_sha256":"a7daeec1cfd6bd1d45d6e1f92010dbc2bab70ea62c3d73db84b7ccdea1d7f074"}}