{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2006:DDL4GJXPA32O5G35XJQGIJPC36","short_pith_number":"pith:DDL4GJXP","canonical_record":{"source":{"id":"cond-mat/0606767","kind":"arxiv","version":2},"metadata":{"license":"","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2006-06-29T13:52:22Z","cross_cats_sorted":[],"title_canon_sha256":"21e01d21f22030d0d8542e0946de64a08d8fd77778796d01f088cfd409df05a1","abstract_canon_sha256":"eb523616b44a5416f10b5ce3e18aafe1fbace73c89c504a526b3d2ddbc617f60"},"schema_version":"1.0"},"canonical_sha256":"18d7c326ef06f4ee9b7dba606425e2df8684e4e16f915ffbc6b777196e292271","source":{"kind":"arxiv","id":"cond-mat/0606767","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"cond-mat/0606767","created_at":"2026-07-04T15:11:23Z"},{"alias_kind":"arxiv_version","alias_value":"cond-mat/0606767v2","created_at":"2026-07-04T15:11:23Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.cond-mat/0606767","created_at":"2026-07-04T15:11:23Z"},{"alias_kind":"pith_short_12","alias_value":"DDL4GJXPA32O","created_at":"2026-07-04T15:11:23Z"},{"alias_kind":"pith_short_16","alias_value":"DDL4GJXPA32O5G35","created_at":"2026-07-04T15:11:23Z"},{"alias_kind":"pith_short_8","alias_value":"DDL4GJXP","created_at":"2026-07-04T15:11:23Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2006:DDL4GJXPA32O5G35XJQGIJPC36","target":"record","payload":{"canonical_record":{"source":{"id":"cond-mat/0606767","kind":"arxiv","version":2},"metadata":{"license":"","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2006-06-29T13:52:22Z","cross_cats_sorted":[],"title_canon_sha256":"21e01d21f22030d0d8542e0946de64a08d8fd77778796d01f088cfd409df05a1","abstract_canon_sha256":"eb523616b44a5416f10b5ce3e18aafe1fbace73c89c504a526b3d2ddbc617f60"},"schema_version":"1.0"},"canonical_sha256":"18d7c326ef06f4ee9b7dba606425e2df8684e4e16f915ffbc6b777196e292271","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T15:11:23.901006Z","signature_b64":"INcSB4rnec8Z26B7wik97q8JIOQa5lAS7J6wTjCDQU/LzeqddhWlFv7FnK8GH3rBWLUpg8/Mmzj2xD9FlI8tDw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"18d7c326ef06f4ee9b7dba606425e2df8684e4e16f915ffbc6b777196e292271","last_reissued_at":"2026-07-04T15:11:23.900588Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T15:11:23.900588Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"cond-mat/0606767","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":"2026-07-04T15:11:23Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"S5Ioev56kzjlOx16ekho/aY379OZKZIiaTpsGEVW6PV78IKNgfFQrNa5EULNETHB8N2WQJL6I+KBTQSmfQGaBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-03T15:38:11.470657Z"},"content_sha256":"dc4f19b7fd87333a90fd16e4175adcf3abc55e5a5a50ab98507220058741ff1e","schema_version":"1.0","event_id":"sha256:dc4f19b7fd87333a90fd16e4175adcf3abc55e5a5a50ab98507220058741ff1e"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2006:DDL4GJXPA32O5G35XJQGIJPC36","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Ab-initio investigation of phonon dispersion and anomalies in palladium","license":"","headline":"","cross_cats":[],"primary_cat":"cond-mat.mtrl-sci","authors_text":"Derek A. Stewart","submitted_at":"2006-06-29T13:52:22Z","abstract_excerpt":"In recent years, palladium has proven to be a crucial component for devices ranging from nanotube field effect transistors to advanced hydrogen storage devices. In this work, I examine the phonon dispersion of fcc Pd using first principle calculations based on density functional perturbation theory. While several groups in the past have studied the acoustic properties of palladium, this is the first study to reproduce the phonon dispersion and associated anomaly with high accuracy and no adjustable parameters. In particular, I focus on the Kohn anomaly in the [110] direction."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"cond-mat/0606767","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/cond-mat/0606767/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":"2026-07-04T15:11:23Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"2G/tMcaPo9Nfk+NwDXooDV+qDNsqK3OHfl7XEwI5ZkE+sbFDnrYm/eNna9RetqSR/m0IrogGU6IE5wg3tSYzDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-03T15:38:11.471163Z"},"content_sha256":"9dd7c3974ee65a0cfb2e89e093f28244b61f6840eaf47cf218491e9895903d0f","schema_version":"1.0","event_id":"sha256:9dd7c3974ee65a0cfb2e89e093f28244b61f6840eaf47cf218491e9895903d0f"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/DDL4GJXPA32O5G35XJQGIJPC36/bundle.json","state_url":"https://pith.science/pith/DDL4GJXPA32O5G35XJQGIJPC36/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/DDL4GJXPA32O5G35XJQGIJPC36/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":"2026-08-03T15:38:11Z","links":{"resolver":"https://pith.science/pith/DDL4GJXPA32O5G35XJQGIJPC36","bundle":"https://pith.science/pith/DDL4GJXPA32O5G35XJQGIJPC36/bundle.json","state":"https://pith.science/pith/DDL4GJXPA32O5G35XJQGIJPC36/state.json","well_known_bundle":"https://pith.science/.well-known/pith/DDL4GJXPA32O5G35XJQGIJPC36/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2006:DDL4GJXPA32O5G35XJQGIJPC36","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":"eb523616b44a5416f10b5ce3e18aafe1fbace73c89c504a526b3d2ddbc617f60","cross_cats_sorted":[],"license":"","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2006-06-29T13:52:22Z","title_canon_sha256":"21e01d21f22030d0d8542e0946de64a08d8fd77778796d01f088cfd409df05a1"},"schema_version":"1.0","source":{"id":"cond-mat/0606767","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"cond-mat/0606767","created_at":"2026-07-04T15:11:23Z"},{"alias_kind":"arxiv_version","alias_value":"cond-mat/0606767v2","created_at":"2026-07-04T15:11:23Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.cond-mat/0606767","created_at":"2026-07-04T15:11:23Z"},{"alias_kind":"pith_short_12","alias_value":"DDL4GJXPA32O","created_at":"2026-07-04T15:11:23Z"},{"alias_kind":"pith_short_16","alias_value":"DDL4GJXPA32O5G35","created_at":"2026-07-04T15:11:23Z"},{"alias_kind":"pith_short_8","alias_value":"DDL4GJXP","created_at":"2026-07-04T15:11:23Z"}],"graph_snapshots":[{"event_id":"sha256:9dd7c3974ee65a0cfb2e89e093f28244b61f6840eaf47cf218491e9895903d0f","target":"graph","created_at":"2026-07-04T15:11:23Z","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/cond-mat/0606767/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"In recent years, palladium has proven to be a crucial component for devices ranging from nanotube field effect transistors to advanced hydrogen storage devices. In this work, I examine the phonon dispersion of fcc Pd using first principle calculations based on density functional perturbation theory. While several groups in the past have studied the acoustic properties of palladium, this is the first study to reproduce the phonon dispersion and associated anomaly with high accuracy and no adjustable parameters. In particular, I focus on the Kohn anomaly in the [110] direction.","authors_text":"Derek A. Stewart","cross_cats":[],"headline":"","license":"","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2006-06-29T13:52:22Z","title":"Ab-initio investigation of phonon dispersion and anomalies in palladium"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"cond-mat/0606767","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:dc4f19b7fd87333a90fd16e4175adcf3abc55e5a5a50ab98507220058741ff1e","target":"record","created_at":"2026-07-04T15:11:23Z","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":"eb523616b44a5416f10b5ce3e18aafe1fbace73c89c504a526b3d2ddbc617f60","cross_cats_sorted":[],"license":"","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2006-06-29T13:52:22Z","title_canon_sha256":"21e01d21f22030d0d8542e0946de64a08d8fd77778796d01f088cfd409df05a1"},"schema_version":"1.0","source":{"id":"cond-mat/0606767","kind":"arxiv","version":2}},"canonical_sha256":"18d7c326ef06f4ee9b7dba606425e2df8684e4e16f915ffbc6b777196e292271","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"18d7c326ef06f4ee9b7dba606425e2df8684e4e16f915ffbc6b777196e292271","first_computed_at":"2026-07-04T15:11:23.900588Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T15:11:23.900588Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"INcSB4rnec8Z26B7wik97q8JIOQa5lAS7J6wTjCDQU/LzeqddhWlFv7FnK8GH3rBWLUpg8/Mmzj2xD9FlI8tDw==","signature_status":"signed_v1","signed_at":"2026-07-04T15:11:23.901006Z","signed_message":"canonical_sha256_bytes"},"source_id":"cond-mat/0606767","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:dc4f19b7fd87333a90fd16e4175adcf3abc55e5a5a50ab98507220058741ff1e","sha256:9dd7c3974ee65a0cfb2e89e093f28244b61f6840eaf47cf218491e9895903d0f"],"state_sha256":"2c2583b7aeca94a15800ce92763d6642afebb83cf46fb7fee0951a841139b393"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"a3MeNiAVmzPjT+poxjQmm2UymwFM6DMAe5eWdM37kbfqQzIIN2UuC9miNSgCOUb+Bvxcs8fkkaIFrWkBxD+5AQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-03T15:38:11.476277Z","bundle_sha256":"2e37ed0aa38366348a3499e7b5fcae97721b1dcf7b02a073c6979d7008cded1f"}}