{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2026:AHDWZRFRYFXAMEUF7GKS5AM7Q4","short_pith_number":"pith:AHDWZRFR","canonical_record":{"source":{"id":"2602.11572","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2026-02-12T04:45:40Z","cross_cats_sorted":[],"title_canon_sha256":"3f5bf64f368437553b11de0f36e5d0c9fdea9e2672c3af4a89da3995426ca1a1","abstract_canon_sha256":"d6fee9b75c05f2776c776c3e5b81167e78b6b27cc383da3f4e34d127456d312a"},"schema_version":"1.0"},"canonical_sha256":"01c76cc4b1c16e061285f9952e819f87318c16b4feb534f072c2235f18bb72c7","source":{"kind":"arxiv","id":"2602.11572","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2602.11572","created_at":"2026-07-01T01:17:47Z"},{"alias_kind":"arxiv_version","alias_value":"2602.11572v2","created_at":"2026-07-01T01:17:47Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2602.11572","created_at":"2026-07-01T01:17:47Z"},{"alias_kind":"pith_short_12","alias_value":"AHDWZRFRYFXA","created_at":"2026-07-01T01:17:47Z"},{"alias_kind":"pith_short_16","alias_value":"AHDWZRFRYFXAMEUF","created_at":"2026-07-01T01:17:47Z"},{"alias_kind":"pith_short_8","alias_value":"AHDWZRFR","created_at":"2026-07-01T01:17:47Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2026:AHDWZRFRYFXAMEUF7GKS5AM7Q4","target":"record","payload":{"canonical_record":{"source":{"id":"2602.11572","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2026-02-12T04:45:40Z","cross_cats_sorted":[],"title_canon_sha256":"3f5bf64f368437553b11de0f36e5d0c9fdea9e2672c3af4a89da3995426ca1a1","abstract_canon_sha256":"d6fee9b75c05f2776c776c3e5b81167e78b6b27cc383da3f4e34d127456d312a"},"schema_version":"1.0"},"canonical_sha256":"01c76cc4b1c16e061285f9952e819f87318c16b4feb534f072c2235f18bb72c7","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-01T01:17:47.059997Z","signature_b64":"w64h+hMdnrmOyIgR8wpy7xeDqtUVLfPepvEVzupIOpXiHl+Gh7bts5BQrjAJFAwGE8Ct6uJcsTwJpkJgW89qCw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"01c76cc4b1c16e061285f9952e819f87318c16b4feb534f072c2235f18bb72c7","last_reissued_at":"2026-07-01T01:17:47.059366Z","signature_status":"signed_v1","first_computed_at":"2026-07-01T01:17:47.059366Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2602.11572","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":"2026-07-01T01:17:47Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"YR/lPIDl6Hhbix0n/PvEs8bsxC1d7R5ti5/zaQrzCPX6BEx1uOXm4VA7KHHwz0SGMBm8OAvi9I6PpeZBQcFgDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-03T00:24:42.643795Z"},"content_sha256":"b282b4731dc01d6bd6e9ecee5b7d6a75ba339217e927adaccda7a1f73fd1f20e","schema_version":"1.0","event_id":"sha256:b282b4731dc01d6bd6e9ecee5b7d6a75ba339217e927adaccda7a1f73fd1f20e"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2026:AHDWZRFRYFXAMEUF7GKS5AM7Q4","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"How unconventional oxidation state Au$^{2+}$ is stabilized in halide perovskite Cs$_4$Au$_3$Cl$_{12}$: a first-principles study of its polaron crystal nature","license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mtrl-sci","authors_text":"Andrew M. Rappe, Kazuki Morita","submitted_at":"2026-02-12T04:45:40Z","abstract_excerpt":"Gold in crystalline compounds is typically only stable in oxidation states Au1+ and Au3+. Even compounds with nominal Au2+ usually disproportionate into Au1+ and Au3+. Recently, Cs4Au3Cl12 was synthesized, where gold took the 2+ state in the bulk. Here, we investigate this compound using first-principles calculations and show that stabilization of the Au2+ ion is through the formation of a polaron crystal. The electronic and phononic structure suggest that the bonding network can be interpreted as a collection of [Au2+Cl4]2- and [Au3+Cl4]1- square planar motifs, and the crystal lacks a smooth "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2602.11572","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2602.11572/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":"2026-07-01T01:17:47Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"lW/I+HvzXsIj1TL0UunZsCaT0AU8miocFpx7UzhUCnjpJTe4fE75fiUHhXBOJsKFq7+yZotaSi40IOsAzV3sCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-03T00:24:42.644175Z"},"content_sha256":"d8c6c1797c1c0470b7acaeda65d354883e6bf4c233114b7b4a31e5a70c92c0fb","schema_version":"1.0","event_id":"sha256:d8c6c1797c1c0470b7acaeda65d354883e6bf4c233114b7b4a31e5a70c92c0fb"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/AHDWZRFRYFXAMEUF7GKS5AM7Q4/bundle.json","state_url":"https://pith.science/pith/AHDWZRFRYFXAMEUF7GKS5AM7Q4/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/AHDWZRFRYFXAMEUF7GKS5AM7Q4/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":"2026-07-03T00:24:42Z","links":{"resolver":"https://pith.science/pith/AHDWZRFRYFXAMEUF7GKS5AM7Q4","bundle":"https://pith.science/pith/AHDWZRFRYFXAMEUF7GKS5AM7Q4/bundle.json","state":"https://pith.science/pith/AHDWZRFRYFXAMEUF7GKS5AM7Q4/state.json","well_known_bundle":"https://pith.science/.well-known/pith/AHDWZRFRYFXAMEUF7GKS5AM7Q4/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2026:AHDWZRFRYFXAMEUF7GKS5AM7Q4","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":"d6fee9b75c05f2776c776c3e5b81167e78b6b27cc383da3f4e34d127456d312a","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2026-02-12T04:45:40Z","title_canon_sha256":"3f5bf64f368437553b11de0f36e5d0c9fdea9e2672c3af4a89da3995426ca1a1"},"schema_version":"1.0","source":{"id":"2602.11572","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2602.11572","created_at":"2026-07-01T01:17:47Z"},{"alias_kind":"arxiv_version","alias_value":"2602.11572v2","created_at":"2026-07-01T01:17:47Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2602.11572","created_at":"2026-07-01T01:17:47Z"},{"alias_kind":"pith_short_12","alias_value":"AHDWZRFRYFXA","created_at":"2026-07-01T01:17:47Z"},{"alias_kind":"pith_short_16","alias_value":"AHDWZRFRYFXAMEUF","created_at":"2026-07-01T01:17:47Z"},{"alias_kind":"pith_short_8","alias_value":"AHDWZRFR","created_at":"2026-07-01T01:17:47Z"}],"graph_snapshots":[{"event_id":"sha256:d8c6c1797c1c0470b7acaeda65d354883e6bf4c233114b7b4a31e5a70c92c0fb","target":"graph","created_at":"2026-07-01T01:17:47Z","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/2602.11572/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Gold in crystalline compounds is typically only stable in oxidation states Au1+ and Au3+. Even compounds with nominal Au2+ usually disproportionate into Au1+ and Au3+. Recently, Cs4Au3Cl12 was synthesized, where gold took the 2+ state in the bulk. Here, we investigate this compound using first-principles calculations and show that stabilization of the Au2+ ion is through the formation of a polaron crystal. The electronic and phononic structure suggest that the bonding network can be interpreted as a collection of [Au2+Cl4]2- and [Au3+Cl4]1- square planar motifs, and the crystal lacks a smooth ","authors_text":"Andrew M. Rappe, Kazuki Morita","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2026-02-12T04:45:40Z","title":"How unconventional oxidation state Au$^{2+}$ is stabilized in halide perovskite Cs$_4$Au$_3$Cl$_{12}$: a first-principles study of its polaron crystal nature"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2602.11572","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:b282b4731dc01d6bd6e9ecee5b7d6a75ba339217e927adaccda7a1f73fd1f20e","target":"record","created_at":"2026-07-01T01:17:47Z","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":"d6fee9b75c05f2776c776c3e5b81167e78b6b27cc383da3f4e34d127456d312a","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2026-02-12T04:45:40Z","title_canon_sha256":"3f5bf64f368437553b11de0f36e5d0c9fdea9e2672c3af4a89da3995426ca1a1"},"schema_version":"1.0","source":{"id":"2602.11572","kind":"arxiv","version":2}},"canonical_sha256":"01c76cc4b1c16e061285f9952e819f87318c16b4feb534f072c2235f18bb72c7","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"01c76cc4b1c16e061285f9952e819f87318c16b4feb534f072c2235f18bb72c7","first_computed_at":"2026-07-01T01:17:47.059366Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-01T01:17:47.059366Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"w64h+hMdnrmOyIgR8wpy7xeDqtUVLfPepvEVzupIOpXiHl+Gh7bts5BQrjAJFAwGE8Ct6uJcsTwJpkJgW89qCw==","signature_status":"signed_v1","signed_at":"2026-07-01T01:17:47.059997Z","signed_message":"canonical_sha256_bytes"},"source_id":"2602.11572","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:b282b4731dc01d6bd6e9ecee5b7d6a75ba339217e927adaccda7a1f73fd1f20e","sha256:d8c6c1797c1c0470b7acaeda65d354883e6bf4c233114b7b4a31e5a70c92c0fb"],"state_sha256":"4542b69f84b101884d8cf8b0f0d21347b207112fbcabff1c2d52fc6b809bf08f"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"12yaxFZ8corGrsPVUbsJIXpaIRY5CtH8L7ES8ELw9PXXulARmLhcWku9UIkt5ix5D0gAJKHcZBklNdtfcBLIDQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-03T00:24:42.646298Z","bundle_sha256":"e4f58d0c0b0a6ceca174b2e7ca1dcb105a75508323bbe91e7072fcfa5a206060"}}