{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2025:KEL3XRS2YA7P75KRWQ5ERGWQKF","short_pith_number":"pith:KEL3XRS2","canonical_record":{"source":{"id":"2507.21013","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2025-07-28T17:24:44Z","cross_cats_sorted":["cond-mat.mes-hall","cond-mat.str-el"],"title_canon_sha256":"30efd424965e72b5f3f4094316ec992f52dd80f7954c48edab89e95c72e21c36","abstract_canon_sha256":"df4c98cc919ff57119ccc1d2bdf50bb0beae01cdcaad70a505765e0ce823c36d"},"schema_version":"1.0"},"canonical_sha256":"5117bbc65ac03efff551b43a489ad0515d00ac172f0ba0e0b7e136cd5a037bd4","source":{"kind":"arxiv","id":"2507.21013","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2507.21013","created_at":"2026-07-05T11:44:29Z"},{"alias_kind":"arxiv_version","alias_value":"2507.21013v1","created_at":"2026-07-05T11:44:29Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2507.21013","created_at":"2026-07-05T11:44:29Z"},{"alias_kind":"pith_short_12","alias_value":"KEL3XRS2YA7P","created_at":"2026-07-05T11:44:29Z"},{"alias_kind":"pith_short_16","alias_value":"KEL3XRS2YA7P75KR","created_at":"2026-07-05T11:44:29Z"},{"alias_kind":"pith_short_8","alias_value":"KEL3XRS2","created_at":"2026-07-05T11:44:29Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2025:KEL3XRS2YA7P75KRWQ5ERGWQKF","target":"record","payload":{"canonical_record":{"source":{"id":"2507.21013","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2025-07-28T17:24:44Z","cross_cats_sorted":["cond-mat.mes-hall","cond-mat.str-el"],"title_canon_sha256":"30efd424965e72b5f3f4094316ec992f52dd80f7954c48edab89e95c72e21c36","abstract_canon_sha256":"df4c98cc919ff57119ccc1d2bdf50bb0beae01cdcaad70a505765e0ce823c36d"},"schema_version":"1.0"},"canonical_sha256":"5117bbc65ac03efff551b43a489ad0515d00ac172f0ba0e0b7e136cd5a037bd4","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T11:44:29.720474Z","signature_b64":"m1fSQAr32nwuYYnaMmhdWgA3I5DEtn3BHcqOsr1WfgEMacFIcEq2nypQ0LbfH2lGb1nRrz430FnG3+BQO/BOBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"5117bbc65ac03efff551b43a489ad0515d00ac172f0ba0e0b7e136cd5a037bd4","last_reissued_at":"2026-07-05T11:44:29.720008Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T11:44:29.720008Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2507.21013","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":"2026-07-05T11:44:29Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"6SuHrmxnnqSmgoPVpVjitB70ameeGMAglVxvhM0I72e7e92ovUabG61Rd2Uo7lG2rm4zK2ryJeIl1YTiEEcfBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-21T13:59:44.038220Z"},"content_sha256":"d27aed5a85cbe486a74c367b9a011b736d12375068c214af4e5e7f3d14338bad","schema_version":"1.0","event_id":"sha256:d27aed5a85cbe486a74c367b9a011b736d12375068c214af4e5e7f3d14338bad"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2025:KEL3XRS2YA7P75KRWQ5ERGWQKF","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Superconducting density of states of PtPb4","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["cond-mat.mes-hall","cond-mat.str-el"],"primary_cat":"cond-mat.supr-con","authors_text":"Alexander I. Buzdin, Edwin Herrera, Hermann Suderow, Isabel Guillam\\'on, Jose Antonio Moreno, Pablo Garc\\'ia Talavera, Paul C. Canfield, Sergey L. Bud'ko","submitted_at":"2025-07-28T17:24:44Z","abstract_excerpt":"PtPb$_4$ is a type II superconductor with a bulk critical temperature $T_{c}\\approx 3 $K and an upper critical field of $H_{c2}=0.36 $T. PtPb$_4$ is related to non-superconducting PtSn$_4$, which presents nodal arc states at the surface. Here we measure the superconducting density of states of PtPb$_4$ using millikelvin Scanning Tunneling Microscopy (STM). We observe a fully opened superconducting gap of $\\Delta=0.48$\\ meV similar to expectations from Bardeen Cooper and Schrieffer (BCS) theory ($\\Delta_0=1.76k_BT_{c}=0.49 $meV). Measurements under magnetic fields applied perpendicular to the s"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2507.21013","kind":"arxiv","version":1},"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/2507.21013/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":"2026-07-05T11:44:29Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"MRfSSJyUh9ahBDTLx5z1D30HJlJJQIE3EEcpIzYFBBvJ2VV9514IUw8r14fYqqD+5pWzL3wAQB+m1g6SSx7uAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-21T13:59:44.038801Z"},"content_sha256":"d102b8fa9719987f5923933d96761667541425149172bcf074a2ffa25532cbf8","schema_version":"1.0","event_id":"sha256:d102b8fa9719987f5923933d96761667541425149172bcf074a2ffa25532cbf8"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/KEL3XRS2YA7P75KRWQ5ERGWQKF/bundle.json","state_url":"https://pith.science/pith/KEL3XRS2YA7P75KRWQ5ERGWQKF/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/KEL3XRS2YA7P75KRWQ5ERGWQKF/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":"2026-08-21T13:59:44Z","links":{"resolver":"https://pith.science/pith/KEL3XRS2YA7P75KRWQ5ERGWQKF","bundle":"https://pith.science/pith/KEL3XRS2YA7P75KRWQ5ERGWQKF/bundle.json","state":"https://pith.science/pith/KEL3XRS2YA7P75KRWQ5ERGWQKF/state.json","well_known_bundle":"https://pith.science/.well-known/pith/KEL3XRS2YA7P75KRWQ5ERGWQKF/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2025:KEL3XRS2YA7P75KRWQ5ERGWQKF","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":"df4c98cc919ff57119ccc1d2bdf50bb0beae01cdcaad70a505765e0ce823c36d","cross_cats_sorted":["cond-mat.mes-hall","cond-mat.str-el"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2025-07-28T17:24:44Z","title_canon_sha256":"30efd424965e72b5f3f4094316ec992f52dd80f7954c48edab89e95c72e21c36"},"schema_version":"1.0","source":{"id":"2507.21013","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2507.21013","created_at":"2026-07-05T11:44:29Z"},{"alias_kind":"arxiv_version","alias_value":"2507.21013v1","created_at":"2026-07-05T11:44:29Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2507.21013","created_at":"2026-07-05T11:44:29Z"},{"alias_kind":"pith_short_12","alias_value":"KEL3XRS2YA7P","created_at":"2026-07-05T11:44:29Z"},{"alias_kind":"pith_short_16","alias_value":"KEL3XRS2YA7P75KR","created_at":"2026-07-05T11:44:29Z"},{"alias_kind":"pith_short_8","alias_value":"KEL3XRS2","created_at":"2026-07-05T11:44:29Z"}],"graph_snapshots":[{"event_id":"sha256:d102b8fa9719987f5923933d96761667541425149172bcf074a2ffa25532cbf8","target":"graph","created_at":"2026-07-05T11:44:29Z","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/2507.21013/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"PtPb$_4$ is a type II superconductor with a bulk critical temperature $T_{c}\\approx 3 $K and an upper critical field of $H_{c2}=0.36 $T. PtPb$_4$ is related to non-superconducting PtSn$_4$, which presents nodal arc states at the surface. Here we measure the superconducting density of states of PtPb$_4$ using millikelvin Scanning Tunneling Microscopy (STM). We observe a fully opened superconducting gap of $\\Delta=0.48$\\ meV similar to expectations from Bardeen Cooper and Schrieffer (BCS) theory ($\\Delta_0=1.76k_BT_{c}=0.49 $meV). Measurements under magnetic fields applied perpendicular to the s","authors_text":"Alexander I. Buzdin, Edwin Herrera, Hermann Suderow, Isabel Guillam\\'on, Jose Antonio Moreno, Pablo Garc\\'ia Talavera, Paul C. Canfield, Sergey L. Bud'ko","cross_cats":["cond-mat.mes-hall","cond-mat.str-el"],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2025-07-28T17:24:44Z","title":"Superconducting density of states of PtPb4"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2507.21013","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:d27aed5a85cbe486a74c367b9a011b736d12375068c214af4e5e7f3d14338bad","target":"record","created_at":"2026-07-05T11:44:29Z","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":"df4c98cc919ff57119ccc1d2bdf50bb0beae01cdcaad70a505765e0ce823c36d","cross_cats_sorted":["cond-mat.mes-hall","cond-mat.str-el"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2025-07-28T17:24:44Z","title_canon_sha256":"30efd424965e72b5f3f4094316ec992f52dd80f7954c48edab89e95c72e21c36"},"schema_version":"1.0","source":{"id":"2507.21013","kind":"arxiv","version":1}},"canonical_sha256":"5117bbc65ac03efff551b43a489ad0515d00ac172f0ba0e0b7e136cd5a037bd4","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"5117bbc65ac03efff551b43a489ad0515d00ac172f0ba0e0b7e136cd5a037bd4","first_computed_at":"2026-07-05T11:44:29.720008Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T11:44:29.720008Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"m1fSQAr32nwuYYnaMmhdWgA3I5DEtn3BHcqOsr1WfgEMacFIcEq2nypQ0LbfH2lGb1nRrz430FnG3+BQO/BOBg==","signature_status":"signed_v1","signed_at":"2026-07-05T11:44:29.720474Z","signed_message":"canonical_sha256_bytes"},"source_id":"2507.21013","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:d27aed5a85cbe486a74c367b9a011b736d12375068c214af4e5e7f3d14338bad","sha256:d102b8fa9719987f5923933d96761667541425149172bcf074a2ffa25532cbf8"],"state_sha256":"e1d515c5d58db9e4f83cf2b6ac94055cf21ffb9a6b508e15cbf049d7ddd692d9"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"IQ8yg4LMApBS0ZnKtpgQiAIjJtYKDmQmlzdPzZ9zi0Swmcc6H4hBefrnes29pmq2xxqAkj189ED4PYL29SU3Cw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-21T13:59:44.043320Z","bundle_sha256":"087f505a84f77ee37e031ad6dbf1c7b9a9cba557168c5500ab4af512b68c5ef9"}}