{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2026:UVR2TNIIIFXKB26P7XSVEAM2F2","short_pith_number":"pith:UVR2TNII","canonical_record":{"source":{"id":"2605.15703","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2026-05-15T07:48:59Z","cross_cats_sorted":["cond-mat.mes-hall","cond-mat.mtrl-sci","cond-mat.str-el"],"title_canon_sha256":"97cf871f9458306dff7227e62b1ce8d49fabc8bccff98c7d296a9c4d17e3f62b","abstract_canon_sha256":"6a6ec52c53a506ee4c08edaa59368bdea94656fcc6dd4d8509a9fb9a4faab98a"},"schema_version":"1.0"},"canonical_sha256":"a563a9b508416ea0ebcffde552019a2ea54559cf4eea3808ea096db0a22f17e0","source":{"kind":"arxiv","id":"2605.15703","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2605.15703","created_at":"2026-05-20T00:01:13Z"},{"alias_kind":"arxiv_version","alias_value":"2605.15703v1","created_at":"2026-05-20T00:01:13Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2605.15703","created_at":"2026-05-20T00:01:13Z"},{"alias_kind":"pith_short_12","alias_value":"UVR2TNIIIFXK","created_at":"2026-05-20T00:01:13Z"},{"alias_kind":"pith_short_16","alias_value":"UVR2TNIIIFXKB26P","created_at":"2026-05-20T00:01:13Z"},{"alias_kind":"pith_short_8","alias_value":"UVR2TNII","created_at":"2026-05-20T00:01:13Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2026:UVR2TNIIIFXKB26P7XSVEAM2F2","target":"record","payload":{"canonical_record":{"source":{"id":"2605.15703","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2026-05-15T07:48:59Z","cross_cats_sorted":["cond-mat.mes-hall","cond-mat.mtrl-sci","cond-mat.str-el"],"title_canon_sha256":"97cf871f9458306dff7227e62b1ce8d49fabc8bccff98c7d296a9c4d17e3f62b","abstract_canon_sha256":"6a6ec52c53a506ee4c08edaa59368bdea94656fcc6dd4d8509a9fb9a4faab98a"},"schema_version":"1.0"},"canonical_sha256":"a563a9b508416ea0ebcffde552019a2ea54559cf4eea3808ea096db0a22f17e0","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-20T00:01:13.404950Z","signature_b64":"JtmJZpmRQTIOp/a0EsJz20bJM8l88JotRRZ9qfyDqaCj6RCXDb8/Fc4+tYAYC+woreU5pjPgBDaOPQT1lcRWCg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"a563a9b508416ea0ebcffde552019a2ea54559cf4eea3808ea096db0a22f17e0","last_reissued_at":"2026-05-20T00:01:13.404229Z","signature_status":"signed_v1","first_computed_at":"2026-05-20T00:01:13.404229Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2605.15703","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-20T00:01:13Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"hVLTjk18gp5uaCR3W4DrcO867+fVMhrtqizKIvrIIdF4wYXumuKZ+hIw9fUjYwgejSi4L8X6pHDqyD5SgQpkCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T13:15:15.083669Z"},"content_sha256":"12757214b2ee27e6569ee0c5e877d15a6beb8b74b265430d88b95d976787d4eb","schema_version":"1.0","event_id":"sha256:12757214b2ee27e6569ee0c5e877d15a6beb8b74b265430d88b95d976787d4eb"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2026:UVR2TNIIIFXKB26P7XSVEAM2F2","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Observation of flat-bottom U-shaped energy gap in high-Tc nickelate (La,Pr)3Ni2O7 thin films","license":"http://creativecommons.org/licenses/by/4.0/","headline":"An energy-symmetric flat-bottom U-shaped gap consistent with nodeless superconductivity is observed in high-Tc nickelate thin films at ambient pressure.","cross_cats":["cond-mat.mes-hall","cond-mat.mtrl-sci","cond-mat.str-el"],"primary_cat":"cond-mat.supr-con","authors_text":"Haoran Ji, Jian Wang, Tianheng Wei, Wei Ren, Yanzhao Liu, Zhen Liang, Zheyuan Xie, Ziqiang Wang","submitted_at":"2026-05-15T07:48:59Z","abstract_excerpt":"The discovery of high transition temperature (high-Tc) superconductivity in Ruddlesden-Popper (R-P) bilayer nickelates under high pressure has stimulated extensive work to understand the underlying mechanism and search for superconductors with higher Tc. The recent realization of superconductivity in R-P bilayer nickelate thin films with onset Tc above 40 K at ambient-pressure enables the use of a wide array of powerful experimental tools to investigate the unconventional high-Tc superconductivity in bilayer nickelates. Here, using ultra-low temperature scanning tunneling microscopy/spectrosco"},"claims":{"count":4,"items":[{"kind":"strongest_claim","text":"The energy-symmetric, flat-bottom U-shaped gap with zero residual density of states, taken together with its dependence on magnetic field and temperature, is consistent with the behavior of a superconducting gap, suggesting a nodeless gap function at ultra-low temperatures.","source":"verdict.strongest_claim","status":"machine_extracted","claim_id":"C1","attestation":"unclaimed"},{"kind":"weakest_assumption","text":"That the tunneling spectra measured by STM/S directly represent the intrinsic bulk superconducting density of states of the film without dominant contributions from surface reconstruction, disorder, or non-superconducting phases. This premise enters when the abstract interprets the U-shaped gap and its field/temperature dependence as evidence for superconductivity.","source":"verdict.weakest_assumption","status":"machine_extracted","claim_id":"C2","attestation":"unclaimed"},{"kind":"one_line_summary","text":"Observation of an energy-symmetric flat-bottom U-shaped gap with zero residual DOS in (La,Pr)3Ni2O7 thin films, showing unconventional temperature evolution and magnetic field suppression consistent with a nodeless superconducting gap.","source":"verdict.one_line_summary","status":"machine_extracted","claim_id":"C3","attestation":"unclaimed"},{"kind":"headline","text":"An energy-symmetric flat-bottom U-shaped gap consistent with nodeless superconductivity is observed in high-Tc nickelate thin films at ambient pressure.","source":"verdict.pith_extraction.headline","status":"machine_extracted","claim_id":"C4","attestation":"unclaimed"}],"snapshot_sha256":"3112cc779e24f50fc65e7983394f774e8de871e537f0ae49c22a8f6a595a7267"},"source":{"id":"2605.15703","kind":"arxiv","version":1},"verdict":{"id":"73118550-3400-4e12-bd25-48bec69cb0a2","model_set":{"reader":"grok-4.3"},"created_at":"2026-05-19T19:36:09.718993Z","strongest_claim":"The energy-symmetric, flat-bottom U-shaped gap with zero residual density of states, taken together with its dependence on magnetic field and temperature, is consistent with the behavior of a superconducting gap, suggesting a nodeless gap function at ultra-low temperatures.","one_line_summary":"Observation of an energy-symmetric flat-bottom U-shaped gap with zero residual DOS in (La,Pr)3Ni2O7 thin films, showing unconventional temperature evolution and magnetic field suppression consistent with a nodeless superconducting gap.","pipeline_version":"pith-pipeline@v0.9.0","weakest_assumption":"That the tunneling spectra measured by STM/S directly represent the intrinsic bulk superconducting density of states of the film without dominant contributions from surface reconstruction, disorder, or non-superconducting phases. This premise enters when the abstract interprets the U-shaped gap and its field/temperature dependence as evidence for superconductivity.","pith_extraction_headline":"An energy-symmetric flat-bottom U-shaped gap consistent with nodeless superconductivity is observed in high-Tc nickelate thin films at ambient pressure."},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2605.15703/integrity.json","findings":[],"available":true,"detectors_run":[{"name":"doi_title_agreement","ran_at":"2026-05-19T20:01:19.219182Z","status":"completed","version":"1.0.0","findings_count":0},{"name":"doi_compliance","ran_at":"2026-05-19T19:41:02.875330Z","status":"completed","version":"1.0.0","findings_count":0},{"name":"ai_meta_artifact","ran_at":"2026-05-19T19:33:27.253782Z","status":"skipped","version":"1.0.0","findings_count":0},{"name":"claim_evidence","ran_at":"2026-05-19T17:21:56.029638Z","status":"completed","version":"1.0.0","findings_count":0}],"snapshot_sha256":"b830c9dd33bf587c6117d50e3bad0e35b153d3a78e5165afe5f7351203099bed"},"references":{"count":61,"sample":[{"doi":"","year":2023,"title":"Sun, H. et al. Signatures of superconductivity near 80 K in a nickelate under high pressure. Nature 621, 493–498 (2023)","work_id":"ca66c0e2-d412-4e65-9e3f-9cc0649d088d","ref_index":1,"cited_arxiv_id":"","is_internal_anchor":false},{"doi":"","year":2024,"title":"Zhang, Y . et al. High-temperature superconductivity with zero resistance and strange-metal behaviour in La3Ni2O7−δ. Nature Physics 20, 1269–1273 (2024)","work_id":"81b986d7-7cea-4e07-b3b1-65c8d2b26934","ref_index":2,"cited_arxiv_id":"","is_internal_anchor":false},{"doi":"","year":2024,"title":"Wang, N. et al. Bulk high-temperature superconductivity in pressurized tetragonal La2PrNi2O7. Nature 634, 579–584 (2024)","work_id":"b334401f-9559-4109-8111-c01fa89f2357","ref_index":3,"cited_arxiv_id":"","is_internal_anchor":false},{"doi":"","year":2024,"title":"Yang, J. et al. Orbital-dependent electron correlation in double-layer nickelate La3Ni2O7. Nature Communications 15, 4373 (2024)","work_id":"e6475322-df82-4b02-baf3-abcb30bcac83","ref_index":4,"cited_arxiv_id":"","is_internal_anchor":false},{"doi":"","year":2023,"title":"Luo, Z., Hu, X., Wang, M., Wú, W. & Yao, D.-X. Bilayer Two-Orbital Model of La3Ni2O7 under Pressure. Physical Review Letters 131, 126001 (2023)","work_id":"71281e35-25c9-4dfe-a4cd-9c466e523df2","ref_index":5,"cited_arxiv_id":"","is_internal_anchor":false}],"resolved_work":61,"snapshot_sha256":"6304912d01c1838df703bf4ca605f38e6d0e07c160ee3068a98f3ae1419940be","internal_anchors":1},"formal_canon":{"evidence_count":2,"snapshot_sha256":"da719713963e14daec3317d17e3e4d1e41484808767e72aeedf12814fa89df1c"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"verdict_id":"73118550-3400-4e12-bd25-48bec69cb0a2"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-20T00:01:13Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"axoxCJAZ9FU5X35SM3/VQlPYbYVw3zcbtFG6P9LaCfIwa3kZj6uP89M1UoglFOfTmu4ditwuqPnDFiqtpf93Dg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T13:15:15.085137Z"},"content_sha256":"b6fb779763c602002e0f61151b13fe0a601741b75dc187628c3c78d01ad89c33","schema_version":"1.0","event_id":"sha256:b6fb779763c602002e0f61151b13fe0a601741b75dc187628c3c78d01ad89c33"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/UVR2TNIIIFXKB26P7XSVEAM2F2/bundle.json","state_url":"https://pith.science/pith/UVR2TNIIIFXKB26P7XSVEAM2F2/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/UVR2TNIIIFXKB26P7XSVEAM2F2/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":"2026-05-25T13:15:15Z","links":{"resolver":"https://pith.science/pith/UVR2TNIIIFXKB26P7XSVEAM2F2","bundle":"https://pith.science/pith/UVR2TNIIIFXKB26P7XSVEAM2F2/bundle.json","state":"https://pith.science/pith/UVR2TNIIIFXKB26P7XSVEAM2F2/state.json","well_known_bundle":"https://pith.science/.well-known/pith/UVR2TNIIIFXKB26P7XSVEAM2F2/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2026:UVR2TNIIIFXKB26P7XSVEAM2F2","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":"6a6ec52c53a506ee4c08edaa59368bdea94656fcc6dd4d8509a9fb9a4faab98a","cross_cats_sorted":["cond-mat.mes-hall","cond-mat.mtrl-sci","cond-mat.str-el"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2026-05-15T07:48:59Z","title_canon_sha256":"97cf871f9458306dff7227e62b1ce8d49fabc8bccff98c7d296a9c4d17e3f62b"},"schema_version":"1.0","source":{"id":"2605.15703","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2605.15703","created_at":"2026-05-20T00:01:13Z"},{"alias_kind":"arxiv_version","alias_value":"2605.15703v1","created_at":"2026-05-20T00:01:13Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2605.15703","created_at":"2026-05-20T00:01:13Z"},{"alias_kind":"pith_short_12","alias_value":"UVR2TNIIIFXK","created_at":"2026-05-20T00:01:13Z"},{"alias_kind":"pith_short_16","alias_value":"UVR2TNIIIFXKB26P","created_at":"2026-05-20T00:01:13Z"},{"alias_kind":"pith_short_8","alias_value":"UVR2TNII","created_at":"2026-05-20T00:01:13Z"}],"graph_snapshots":[{"event_id":"sha256:b6fb779763c602002e0f61151b13fe0a601741b75dc187628c3c78d01ad89c33","target":"graph","created_at":"2026-05-20T00:01:13Z","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":4,"items":[{"attestation":"unclaimed","claim_id":"C1","kind":"strongest_claim","source":"verdict.strongest_claim","status":"machine_extracted","text":"The energy-symmetric, flat-bottom U-shaped gap with zero residual density of states, taken together with its dependence on magnetic field and temperature, is consistent with the behavior of a superconducting gap, suggesting a nodeless gap function at ultra-low temperatures."},{"attestation":"unclaimed","claim_id":"C2","kind":"weakest_assumption","source":"verdict.weakest_assumption","status":"machine_extracted","text":"That the tunneling spectra measured by STM/S directly represent the intrinsic bulk superconducting density of states of the film without dominant contributions from surface reconstruction, disorder, or non-superconducting phases. This premise enters when the abstract interprets the U-shaped gap and its field/temperature dependence as evidence for superconductivity."},{"attestation":"unclaimed","claim_id":"C3","kind":"one_line_summary","source":"verdict.one_line_summary","status":"machine_extracted","text":"Observation of an energy-symmetric flat-bottom U-shaped gap with zero residual DOS in (La,Pr)3Ni2O7 thin films, showing unconventional temperature evolution and magnetic field suppression consistent with a nodeless superconducting gap."},{"attestation":"unclaimed","claim_id":"C4","kind":"headline","source":"verdict.pith_extraction.headline","status":"machine_extracted","text":"An energy-symmetric flat-bottom U-shaped gap consistent with nodeless superconductivity is observed in high-Tc nickelate thin films at ambient pressure."}],"snapshot_sha256":"3112cc779e24f50fc65e7983394f774e8de871e537f0ae49c22a8f6a595a7267"},"formal_canon":{"evidence_count":2,"snapshot_sha256":"da719713963e14daec3317d17e3e4d1e41484808767e72aeedf12814fa89df1c"},"integrity":{"available":true,"clean":true,"detectors_run":[{"findings_count":0,"name":"doi_title_agreement","ran_at":"2026-05-19T20:01:19.219182Z","status":"completed","version":"1.0.0"},{"findings_count":0,"name":"doi_compliance","ran_at":"2026-05-19T19:41:02.875330Z","status":"completed","version":"1.0.0"},{"findings_count":0,"name":"ai_meta_artifact","ran_at":"2026-05-19T19:33:27.253782Z","status":"skipped","version":"1.0.0"},{"findings_count":0,"name":"claim_evidence","ran_at":"2026-05-19T17:21:56.029638Z","status":"completed","version":"1.0.0"}],"endpoint":"/pith/2605.15703/integrity.json","findings":[],"snapshot_sha256":"b830c9dd33bf587c6117d50e3bad0e35b153d3a78e5165afe5f7351203099bed","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The discovery of high transition temperature (high-Tc) superconductivity in Ruddlesden-Popper (R-P) bilayer nickelates under high pressure has stimulated extensive work to understand the underlying mechanism and search for superconductors with higher Tc. The recent realization of superconductivity in R-P bilayer nickelate thin films with onset Tc above 40 K at ambient-pressure enables the use of a wide array of powerful experimental tools to investigate the unconventional high-Tc superconductivity in bilayer nickelates. Here, using ultra-low temperature scanning tunneling microscopy/spectrosco","authors_text":"Haoran Ji, Jian Wang, Tianheng Wei, Wei Ren, Yanzhao Liu, Zhen Liang, Zheyuan Xie, Ziqiang Wang","cross_cats":["cond-mat.mes-hall","cond-mat.mtrl-sci","cond-mat.str-el"],"headline":"An energy-symmetric flat-bottom U-shaped gap consistent with nodeless superconductivity is observed in high-Tc nickelate thin films at ambient pressure.","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2026-05-15T07:48:59Z","title":"Observation of flat-bottom U-shaped energy gap in high-Tc nickelate (La,Pr)3Ni2O7 thin films"},"references":{"count":61,"internal_anchors":1,"resolved_work":61,"sample":[{"cited_arxiv_id":"","doi":"","is_internal_anchor":false,"ref_index":1,"title":"Sun, H. et al. Signatures of superconductivity near 80 K in a nickelate under high pressure. Nature 621, 493–498 (2023)","work_id":"ca66c0e2-d412-4e65-9e3f-9cc0649d088d","year":2023},{"cited_arxiv_id":"","doi":"","is_internal_anchor":false,"ref_index":2,"title":"Zhang, Y . et al. High-temperature superconductivity with zero resistance and strange-metal behaviour in La3Ni2O7−δ. Nature Physics 20, 1269–1273 (2024)","work_id":"81b986d7-7cea-4e07-b3b1-65c8d2b26934","year":2024},{"cited_arxiv_id":"","doi":"","is_internal_anchor":false,"ref_index":3,"title":"Wang, N. et al. Bulk high-temperature superconductivity in pressurized tetragonal La2PrNi2O7. Nature 634, 579–584 (2024)","work_id":"b334401f-9559-4109-8111-c01fa89f2357","year":2024},{"cited_arxiv_id":"","doi":"","is_internal_anchor":false,"ref_index":4,"title":"Yang, J. et al. Orbital-dependent electron correlation in double-layer nickelate La3Ni2O7. Nature Communications 15, 4373 (2024)","work_id":"e6475322-df82-4b02-baf3-abcb30bcac83","year":2024},{"cited_arxiv_id":"","doi":"","is_internal_anchor":false,"ref_index":5,"title":"Luo, Z., Hu, X., Wang, M., Wú, W. & Yao, D.-X. Bilayer Two-Orbital Model of La3Ni2O7 under Pressure. Physical Review Letters 131, 126001 (2023)","work_id":"71281e35-25c9-4dfe-a4cd-9c466e523df2","year":2023}],"snapshot_sha256":"6304912d01c1838df703bf4ca605f38e6d0e07c160ee3068a98f3ae1419940be"},"source":{"id":"2605.15703","kind":"arxiv","version":1},"verdict":{"created_at":"2026-05-19T19:36:09.718993Z","id":"73118550-3400-4e12-bd25-48bec69cb0a2","model_set":{"reader":"grok-4.3"},"one_line_summary":"Observation of an energy-symmetric flat-bottom U-shaped gap with zero residual DOS in (La,Pr)3Ni2O7 thin films, showing unconventional temperature evolution and magnetic field suppression consistent with a nodeless superconducting gap.","pipeline_version":"pith-pipeline@v0.9.0","pith_extraction_headline":"An energy-symmetric flat-bottom U-shaped gap consistent with nodeless superconductivity is observed in high-Tc nickelate thin films at ambient pressure.","strongest_claim":"The energy-symmetric, flat-bottom U-shaped gap with zero residual density of states, taken together with its dependence on magnetic field and temperature, is consistent with the behavior of a superconducting gap, suggesting a nodeless gap function at ultra-low temperatures.","weakest_assumption":"That the tunneling spectra measured by STM/S directly represent the intrinsic bulk superconducting density of states of the film without dominant contributions from surface reconstruction, disorder, or non-superconducting phases. This premise enters when the abstract interprets the U-shaped gap and its field/temperature dependence as evidence for superconductivity."}},"verdict_id":"73118550-3400-4e12-bd25-48bec69cb0a2"}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:12757214b2ee27e6569ee0c5e877d15a6beb8b74b265430d88b95d976787d4eb","target":"record","created_at":"2026-05-20T00:01:13Z","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":"6a6ec52c53a506ee4c08edaa59368bdea94656fcc6dd4d8509a9fb9a4faab98a","cross_cats_sorted":["cond-mat.mes-hall","cond-mat.mtrl-sci","cond-mat.str-el"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2026-05-15T07:48:59Z","title_canon_sha256":"97cf871f9458306dff7227e62b1ce8d49fabc8bccff98c7d296a9c4d17e3f62b"},"schema_version":"1.0","source":{"id":"2605.15703","kind":"arxiv","version":1}},"canonical_sha256":"a563a9b508416ea0ebcffde552019a2ea54559cf4eea3808ea096db0a22f17e0","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"a563a9b508416ea0ebcffde552019a2ea54559cf4eea3808ea096db0a22f17e0","first_computed_at":"2026-05-20T00:01:13.404229Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-20T00:01:13.404229Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"JtmJZpmRQTIOp/a0EsJz20bJM8l88JotRRZ9qfyDqaCj6RCXDb8/Fc4+tYAYC+woreU5pjPgBDaOPQT1lcRWCg==","signature_status":"signed_v1","signed_at":"2026-05-20T00:01:13.404950Z","signed_message":"canonical_sha256_bytes"},"source_id":"2605.15703","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:12757214b2ee27e6569ee0c5e877d15a6beb8b74b265430d88b95d976787d4eb","sha256:b6fb779763c602002e0f61151b13fe0a601741b75dc187628c3c78d01ad89c33"],"state_sha256":"f8f63c5bbf152992d007b2986238c4529faa2366ba916e6d117e6c35e548a338"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"g0FIFyqDFRhXtJMPLAaOTtDi7ygCIXoAavNYvA9lR0ZOOQnDaNaKi9XVOCuVYweJ714DXRtl2XZktgvYszyECQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-25T13:15:15.090614Z","bundle_sha256":"6011d43491ef82e50d2251b33e0000f35e431427eac808b02ef4ad8101e11cc8"}}