{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2021:MUJXZC6BWFM73EGUNQSHVY5YCX","short_pith_number":"pith:MUJXZC6B","canonical_record":{"source":{"id":"2101.01620","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2021-01-05T16:12:48Z","cross_cats_sorted":["cond-mat.mes-hall","cond-mat.mtrl-sci"],"title_canon_sha256":"aacf8807123a9f79a18d3770264cbb8a8db4efcabe604ee95e822ecdbc6921de","abstract_canon_sha256":"cfec865212c5d81b9309791986e5a8915d96f469e8717e76246dec062ac2040a"},"schema_version":"1.0"},"canonical_sha256":"65137c8bc1b159fd90d46c247ae3b815ccb0192524133981100186426457b515","source":{"kind":"arxiv","id":"2101.01620","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2101.01620","created_at":"2026-07-05T08:29:57Z"},{"alias_kind":"arxiv_version","alias_value":"2101.01620v2","created_at":"2026-07-05T08:29:57Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2101.01620","created_at":"2026-07-05T08:29:57Z"},{"alias_kind":"pith_short_12","alias_value":"MUJXZC6BWFM7","created_at":"2026-07-05T08:29:57Z"},{"alias_kind":"pith_short_16","alias_value":"MUJXZC6BWFM73EGU","created_at":"2026-07-05T08:29:57Z"},{"alias_kind":"pith_short_8","alias_value":"MUJXZC6B","created_at":"2026-07-05T08:29:57Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2021:MUJXZC6BWFM73EGUNQSHVY5YCX","target":"record","payload":{"canonical_record":{"source":{"id":"2101.01620","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2021-01-05T16:12:48Z","cross_cats_sorted":["cond-mat.mes-hall","cond-mat.mtrl-sci"],"title_canon_sha256":"aacf8807123a9f79a18d3770264cbb8a8db4efcabe604ee95e822ecdbc6921de","abstract_canon_sha256":"cfec865212c5d81b9309791986e5a8915d96f469e8717e76246dec062ac2040a"},"schema_version":"1.0"},"canonical_sha256":"65137c8bc1b159fd90d46c247ae3b815ccb0192524133981100186426457b515","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T08:29:57.562401Z","signature_b64":"OSsAWp/EKvDNV0qMCp3GhnRQy70FJH1Dtpv1LpYX77kJca0fJ1paLrWZjLTOfR0vJnZQ77nZLKNmBXAhXbLtCg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"65137c8bc1b159fd90d46c247ae3b815ccb0192524133981100186426457b515","last_reissued_at":"2026-07-05T08:29:57.561888Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T08:29:57.561888Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2101.01620","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T08:29:57Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"6Rul/HBThtsUd7jOlV//StflheuyO9UjR9q55z2x8yh2rSbpQIWaHJ4LNhzfq7BUBEj9lUVSji9eSNkWYUeQDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-07T07:37:45.308882Z"},"content_sha256":"7964e9be571dcc7cfea52d3462dbb85bea2b5acbc81ad26b304a074aee0ea1a5","schema_version":"1.0","event_id":"sha256:7964e9be571dcc7cfea52d3462dbb85bea2b5acbc81ad26b304a074aee0ea1a5"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2021:MUJXZC6BWFM73EGUNQSHVY5YCX","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Berezinskii-Kosterlitz-Thouless transition in the type-I Weyl semimetal PtBi$_2$","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["cond-mat.mes-hall","cond-mat.mtrl-sci"],"primary_cat":"cond-mat.supr-con","authors_text":"Arthur Veyrat, Bernd B\\\"uchner, Christian Hess, Dima L. Bashlakov, Federico Caglieris, Grigory Shipunov, Jeroen van den Brink, Jorge I. Facio, Joseph Dufouleur, Rohith Acharya, Romain Giraud, Saicharan Aswartham, Titouan Charvin, Valentin Labracherie, Yurii Naidyuk","submitted_at":"2021-01-05T16:12:48Z","abstract_excerpt":"Symmetry breaking in topological matter has become in recent years a key concept in condensed matter physics to unveil novel electronic states. In this work, we predict that broken inversion symmetry and strong spin-orbit coupling in trigonal PtBi$_2$ lead to a type-I Weyl semimetal band structure. Transport measurements show an unusually robust low dimensional superconductivity in thin exfoliated flakes up to 126 nm in thickness (with $T_c \\sim 275-400$~mK), which constitutes the first report and study of unambiguous superconductivity in a type-I Weyl semimetal. Remarkably, a Berezinskii-Kost"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2101.01620","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/2101.01620/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":"2026-07-05T08:29:57Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"d5sQni1DZfshzZTvJX0O1PRMdg1xj1KX9P2KSYRTzCJhLYKhrXnDFoutDSmHEAjLQ8BJaYE8i6Xolc+8C06mBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-07T07:37:45.309270Z"},"content_sha256":"54379e80c9ed1d50395dfc11d0c15894ee87d757488033f38f07d49253366905","schema_version":"1.0","event_id":"sha256:54379e80c9ed1d50395dfc11d0c15894ee87d757488033f38f07d49253366905"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/MUJXZC6BWFM73EGUNQSHVY5YCX/bundle.json","state_url":"https://pith.science/pith/MUJXZC6BWFM73EGUNQSHVY5YCX/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/MUJXZC6BWFM73EGUNQSHVY5YCX/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":"2026-07-07T07:37:45Z","links":{"resolver":"https://pith.science/pith/MUJXZC6BWFM73EGUNQSHVY5YCX","bundle":"https://pith.science/pith/MUJXZC6BWFM73EGUNQSHVY5YCX/bundle.json","state":"https://pith.science/pith/MUJXZC6BWFM73EGUNQSHVY5YCX/state.json","well_known_bundle":"https://pith.science/.well-known/pith/MUJXZC6BWFM73EGUNQSHVY5YCX/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2021:MUJXZC6BWFM73EGUNQSHVY5YCX","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":"cfec865212c5d81b9309791986e5a8915d96f469e8717e76246dec062ac2040a","cross_cats_sorted":["cond-mat.mes-hall","cond-mat.mtrl-sci"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2021-01-05T16:12:48Z","title_canon_sha256":"aacf8807123a9f79a18d3770264cbb8a8db4efcabe604ee95e822ecdbc6921de"},"schema_version":"1.0","source":{"id":"2101.01620","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2101.01620","created_at":"2026-07-05T08:29:57Z"},{"alias_kind":"arxiv_version","alias_value":"2101.01620v2","created_at":"2026-07-05T08:29:57Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2101.01620","created_at":"2026-07-05T08:29:57Z"},{"alias_kind":"pith_short_12","alias_value":"MUJXZC6BWFM7","created_at":"2026-07-05T08:29:57Z"},{"alias_kind":"pith_short_16","alias_value":"MUJXZC6BWFM73EGU","created_at":"2026-07-05T08:29:57Z"},{"alias_kind":"pith_short_8","alias_value":"MUJXZC6B","created_at":"2026-07-05T08:29:57Z"}],"graph_snapshots":[{"event_id":"sha256:54379e80c9ed1d50395dfc11d0c15894ee87d757488033f38f07d49253366905","target":"graph","created_at":"2026-07-05T08:29:57Z","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/2101.01620/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Symmetry breaking in topological matter has become in recent years a key concept in condensed matter physics to unveil novel electronic states. In this work, we predict that broken inversion symmetry and strong spin-orbit coupling in trigonal PtBi$_2$ lead to a type-I Weyl semimetal band structure. Transport measurements show an unusually robust low dimensional superconductivity in thin exfoliated flakes up to 126 nm in thickness (with $T_c \\sim 275-400$~mK), which constitutes the first report and study of unambiguous superconductivity in a type-I Weyl semimetal. Remarkably, a Berezinskii-Kost","authors_text":"Arthur Veyrat, Bernd B\\\"uchner, Christian Hess, Dima L. Bashlakov, Federico Caglieris, Grigory Shipunov, Jeroen van den Brink, Jorge I. Facio, Joseph Dufouleur, Rohith Acharya, Romain Giraud, Saicharan Aswartham, Titouan Charvin, Valentin Labracherie, Yurii Naidyuk","cross_cats":["cond-mat.mes-hall","cond-mat.mtrl-sci"],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2021-01-05T16:12:48Z","title":"Berezinskii-Kosterlitz-Thouless transition in the type-I Weyl semimetal PtBi$_2$"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2101.01620","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":"sha256:7964e9be571dcc7cfea52d3462dbb85bea2b5acbc81ad26b304a074aee0ea1a5","target":"record","created_at":"2026-07-05T08:29:57Z","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":"cfec865212c5d81b9309791986e5a8915d96f469e8717e76246dec062ac2040a","cross_cats_sorted":["cond-mat.mes-hall","cond-mat.mtrl-sci"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2021-01-05T16:12:48Z","title_canon_sha256":"aacf8807123a9f79a18d3770264cbb8a8db4efcabe604ee95e822ecdbc6921de"},"schema_version":"1.0","source":{"id":"2101.01620","kind":"arxiv","version":2}},"canonical_sha256":"65137c8bc1b159fd90d46c247ae3b815ccb0192524133981100186426457b515","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"65137c8bc1b159fd90d46c247ae3b815ccb0192524133981100186426457b515","first_computed_at":"2026-07-05T08:29:57.561888Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T08:29:57.561888Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"OSsAWp/EKvDNV0qMCp3GhnRQy70FJH1Dtpv1LpYX77kJca0fJ1paLrWZjLTOfR0vJnZQ77nZLKNmBXAhXbLtCg==","signature_status":"signed_v1","signed_at":"2026-07-05T08:29:57.562401Z","signed_message":"canonical_sha256_bytes"},"source_id":"2101.01620","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:7964e9be571dcc7cfea52d3462dbb85bea2b5acbc81ad26b304a074aee0ea1a5","sha256:54379e80c9ed1d50395dfc11d0c15894ee87d757488033f38f07d49253366905"],"state_sha256":"0cd168d5f5f05f7dc86f57f7094721debacac54a36442c617309e9ccba9783ef"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"hHHtj7Ncwb6xEepltPhz2puSsf2G6qAP7u2xKjGTOqHp+hTc63i7EWNkN1vehQ/SCV2RPvsBU129OAYMXXo1Dw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-07T07:37:45.311962Z","bundle_sha256":"9122a170f5dc8afb179c5ac5c36b0c610cb1673210eaf74b98e97aaf883ae212"}}