{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:7QJNMSOFOT227GB725HM2V6D5A","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":"e5c22f3da6befac28266ae11ff2afc7c61e68d79059dc2548f4fe183c04d0362","cross_cats_sorted":["physics.optics"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2018-09-07T23:48:53Z","title_canon_sha256":"7b7bb5c6150617f41750432c7d1eda21e11b96647909b9d1728d4b5f69b52887"},"schema_version":"1.0","source":{"id":"1809.02715","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1809.02715","created_at":"2026-05-17T23:39:41Z"},{"alias_kind":"arxiv_version","alias_value":"1809.02715v2","created_at":"2026-05-17T23:39:41Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1809.02715","created_at":"2026-05-17T23:39:41Z"},{"alias_kind":"pith_short_12","alias_value":"7QJNMSOFOT22","created_at":"2026-05-18T12:32:11Z"},{"alias_kind":"pith_short_16","alias_value":"7QJNMSOFOT227GB7","created_at":"2026-05-18T12:32:11Z"},{"alias_kind":"pith_short_8","alias_value":"7QJNMSOF","created_at":"2026-05-18T12:32:11Z"}],"graph_snapshots":[{"event_id":"sha256:5f31ef48fb888fcb2caeaac1adf3df22859cf7c59fbb5c355f8620b93e94fe66","target":"graph","created_at":"2026-05-17T23:39:41Z","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":"Metamaterial approach is capable of drastically increasing the critical temperature, Tc, of composite metal-dielectric superconductors. Tripling of Tc was observed in bulk Al-Al2O3 core-shell metamaterials. A theoretical model based on the Maxwell-Garnett approximation provides a microscopic explanation of this effect in terms of electron-electron pairing mediated by a hybrid plasmon-phonon excitation. We report the first observation of this excitation in Al-Al2O3 core-shell metamaterials using inelastic neutron scattering. This result provides support for this novel mechanism of superconducti","authors_text":"Heather Chen-Mayer, Igor I. Smolyaninov, Jeffrey W. Lynn, Joseph C. Prestigiacomo, M. S. Osofsky, Nicholas P. Butch, Vera N. Smolyaninova","cross_cats":["physics.optics"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2018-09-07T23:48:53Z","title":"Observation of plasmon-phonons in a metamaterial superconductor using inelastic neutron scattering"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1809.02715","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:d50b9ab157be270d02a91ccd00463f5fbce078cae0603c3465386d5ef2ae8da2","target":"record","created_at":"2026-05-17T23:39:41Z","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":"e5c22f3da6befac28266ae11ff2afc7c61e68d79059dc2548f4fe183c04d0362","cross_cats_sorted":["physics.optics"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2018-09-07T23:48:53Z","title_canon_sha256":"7b7bb5c6150617f41750432c7d1eda21e11b96647909b9d1728d4b5f69b52887"},"schema_version":"1.0","source":{"id":"1809.02715","kind":"arxiv","version":2}},"canonical_sha256":"fc12d649c574f5af983fd74ecd57c3e82ee8d40169b15a31d37bd4a1b4845978","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"fc12d649c574f5af983fd74ecd57c3e82ee8d40169b15a31d37bd4a1b4845978","first_computed_at":"2026-05-17T23:39:41.700755Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:39:41.700755Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Wo/1C3v5tXerH4D0NnFldY2sxEKu+sufAEU1qBrVzwvIMpEDakkDxjLVj9qOL0dbGIPohOYdhak4ee9b20FsAg==","signature_status":"signed_v1","signed_at":"2026-05-17T23:39:41.701451Z","signed_message":"canonical_sha256_bytes"},"source_id":"1809.02715","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:d50b9ab157be270d02a91ccd00463f5fbce078cae0603c3465386d5ef2ae8da2","sha256:5f31ef48fb888fcb2caeaac1adf3df22859cf7c59fbb5c355f8620b93e94fe66"],"state_sha256":"c602abdce9a06b37000138e5452ff9862d69b5da86a153cc1d80ee727aa1f08e"}