{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:QOT4XNJ76R2ZY2SGRET3HPONZJ","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":"c1e6bfbf30ccb4818714b43f45c14f40f739add518a7bf8451d88866ac382f38","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2017-04-17T03:16:24Z","title_canon_sha256":"cb51bafb071f6b1bcea6743d2658cd57feb759aa27eb85b8036fcd5083dee82c"},"schema_version":"1.0","source":{"id":"1704.04854","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1704.04854","created_at":"2026-05-18T00:46:17Z"},{"alias_kind":"arxiv_version","alias_value":"1704.04854v1","created_at":"2026-05-18T00:46:17Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1704.04854","created_at":"2026-05-18T00:46:17Z"},{"alias_kind":"pith_short_12","alias_value":"QOT4XNJ76R2Z","created_at":"2026-05-18T12:31:39Z"},{"alias_kind":"pith_short_16","alias_value":"QOT4XNJ76R2ZY2SG","created_at":"2026-05-18T12:31:39Z"},{"alias_kind":"pith_short_8","alias_value":"QOT4XNJ7","created_at":"2026-05-18T12:31:39Z"}],"graph_snapshots":[{"event_id":"sha256:de3b3a63a81748d636dded9a2642a9c58a1af410caa3a864f8999a2a00ba01a9","target":"graph","created_at":"2026-05-18T00:46:17Z","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":"The effects of copper doping on the structural and superconducting phase transitions of Ba(Ni$_{1-x}$Cu$_{x}$)$_{2}$As$_{2}$ were studied by examining the resistivity, magnetic susceptibility, and specific heat. We found an abrupt increase in the superconducting transition temperature $T_{\\rm c}$ from 0.6 K in the triclinic phase with less copper ($x$ $\\leq$ 0.16) to 2.5-3.2 K in the tetragonal phase with more copper ($x$ $>$ 0.16). The specific-heat data suggested that doping-induced phonon softening was responsible for the enhanced superconductivity in the tetragonal phase. All of these obse","authors_text":"Kazutaka Kudo, Masaya Takasuga, Minoru Nohara","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2017-04-17T03:16:24Z","title":"Copper Doping of BaNi$_{2}$As$_{2}$: Giant Phonon Softening and Superconductivity Enhancement"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1704.04854","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":"sha256:52eace58b185c92c2634a531c7179d049d4a48cbcb8da2f55e306d112cfaf4a1","target":"record","created_at":"2026-05-18T00:46:17Z","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":"c1e6bfbf30ccb4818714b43f45c14f40f739add518a7bf8451d88866ac382f38","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2017-04-17T03:16:24Z","title_canon_sha256":"cb51bafb071f6b1bcea6743d2658cd57feb759aa27eb85b8036fcd5083dee82c"},"schema_version":"1.0","source":{"id":"1704.04854","kind":"arxiv","version":1}},"canonical_sha256":"83a7cbb53ff4759c6a468927b3bdcdca57b703944f29b813e5aa16b52111ac82","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"83a7cbb53ff4759c6a468927b3bdcdca57b703944f29b813e5aa16b52111ac82","first_computed_at":"2026-05-18T00:46:17.598255Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:46:17.598255Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"74E7CBBjT0Wm95emOo2A+EIAlL0lTLysNlHuQluq2L2JMvwN5ibp2iAcymj3mAn976aKntQVMvBjdAgScmVlDQ==","signature_status":"signed_v1","signed_at":"2026-05-18T00:46:17.598793Z","signed_message":"canonical_sha256_bytes"},"source_id":"1704.04854","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:52eace58b185c92c2634a531c7179d049d4a48cbcb8da2f55e306d112cfaf4a1","sha256:de3b3a63a81748d636dded9a2642a9c58a1af410caa3a864f8999a2a00ba01a9"],"state_sha256":"e4f7754a2d52808780c0fbd375a8bf43643c2413873aa1c100e1d1ea3da13c86"}