{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2024:3FRPAT6SVLETYYWIYRPY5FRQTJ","short_pith_number":"pith:3FRPAT6S","schema_version":"1.0","canonical_sha256":"d962f04fd2aac93c62c8c45f8e96309a6a82c509bbdd973b0ec7838dbee1c340","source":{"kind":"arxiv","id":"2407.12922","version":2},"attestation_state":"computed","paper":{"title":"Fundamental limits on the electron-phonon coupling and superconducting $T_c$","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.supr-con","authors_text":"Boris L. Altshuler, Dmitrii V. Semenok, Emil A. Yuzbashyan","submitted_at":"2024-07-17T18:00:15Z","abstract_excerpt":"Fundamental upper bounds on the electron-phonon interaction strength and superconducting transition temperature $T_c$ in metals are established based on the intrinsic instability of the equilibrium between electrons and the crystal lattice under strong interaction. This instability explains why observed electron-phonon coupling constants are limited to $\\lambda \\lesssim 4$. The theory also accounts for the mechanism of metastable superconductivity with enhanced $T_c$, which emerges near the instability threshold. Based on theoretical analysis and comparison with experimental data, room-tempera"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"2407.12922","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2024-07-17T18:00:15Z","cross_cats_sorted":[],"title_canon_sha256":"fc4b8839c19f65a8c08e0103ff895c32aab3dce3108d693fed64fc81e4e72250","abstract_canon_sha256":"ab2b51e7690abe48e5b6dd9373d35e861882415e645e5e2fdbf446b8255273f4"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T11:47:57.021254Z","signature_b64":"m5kVJD61YpK46yUrl83LKv4jf6UP+uGgCFdjrRst+ph2n9seqLYzUTDEmq6htVH6XeY2RbAWkQloJ/yTu9+YCQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"d962f04fd2aac93c62c8c45f8e96309a6a82c509bbdd973b0ec7838dbee1c340","last_reissued_at":"2026-07-05T11:47:57.020702Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T11:47:57.020702Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Fundamental limits on the electron-phonon coupling and superconducting $T_c$","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.supr-con","authors_text":"Boris L. Altshuler, Dmitrii V. Semenok, Emil A. Yuzbashyan","submitted_at":"2024-07-17T18:00:15Z","abstract_excerpt":"Fundamental upper bounds on the electron-phonon interaction strength and superconducting transition temperature $T_c$ in metals are established based on the intrinsic instability of the equilibrium between electrons and the crystal lattice under strong interaction. This instability explains why observed electron-phonon coupling constants are limited to $\\lambda \\lesssim 4$. The theory also accounts for the mechanism of metastable superconductivity with enhanced $T_c$, which emerges near the instability threshold. Based on theoretical analysis and comparison with experimental data, room-tempera"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2407.12922","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/2407.12922/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"},"aliases":[{"alias_kind":"arxiv","alias_value":"2407.12922","created_at":"2026-07-05T11:47:57.020759+00:00"},{"alias_kind":"arxiv_version","alias_value":"2407.12922v2","created_at":"2026-07-05T11:47:57.020759+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2407.12922","created_at":"2026-07-05T11:47:57.020759+00:00"},{"alias_kind":"pith_short_12","alias_value":"3FRPAT6SVLET","created_at":"2026-07-05T11:47:57.020759+00:00"},{"alias_kind":"pith_short_16","alias_value":"3FRPAT6SVLETYYWI","created_at":"2026-07-05T11:47:57.020759+00:00"},{"alias_kind":"pith_short_8","alias_value":"3FRPAT6S","created_at":"2026-07-05T11:47:57.020759+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/3FRPAT6SVLETYYWIYRPY5FRQTJ","json":"https://pith.science/pith/3FRPAT6SVLETYYWIYRPY5FRQTJ.json","graph_json":"https://pith.science/api/pith-number/3FRPAT6SVLETYYWIYRPY5FRQTJ/graph.json","events_json":"https://pith.science/api/pith-number/3FRPAT6SVLETYYWIYRPY5FRQTJ/events.json","paper":"https://pith.science/paper/3FRPAT6S"},"agent_actions":{"view_html":"https://pith.science/pith/3FRPAT6SVLETYYWIYRPY5FRQTJ","download_json":"https://pith.science/pith/3FRPAT6SVLETYYWIYRPY5FRQTJ.json","view_paper":"https://pith.science/paper/3FRPAT6S","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=2407.12922&json=true","fetch_graph":"https://pith.science/api/pith-number/3FRPAT6SVLETYYWIYRPY5FRQTJ/graph.json","fetch_events":"https://pith.science/api/pith-number/3FRPAT6SVLETYYWIYRPY5FRQTJ/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/3FRPAT6SVLETYYWIYRPY5FRQTJ/action/timestamp_anchor","attest_storage":"https://pith.science/pith/3FRPAT6SVLETYYWIYRPY5FRQTJ/action/storage_attestation","attest_author":"https://pith.science/pith/3FRPAT6SVLETYYWIYRPY5FRQTJ/action/author_attestation","sign_citation":"https://pith.science/pith/3FRPAT6SVLETYYWIYRPY5FRQTJ/action/citation_signature","submit_replication":"https://pith.science/pith/3FRPAT6SVLETYYWIYRPY5FRQTJ/action/replication_record"}},"created_at":"2026-07-05T11:47:57.020759+00:00","updated_at":"2026-07-05T11:47:57.020759+00:00"}