{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2008:GADSLGX6ISWIC7UBBIV4RLZPFB","short_pith_number":"pith:GADSLGX6","canonical_record":{"source":{"id":"0808.2356","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2008-08-18T09:12:45Z","cross_cats_sorted":["cond-mat.mtrl-sci"],"title_canon_sha256":"92ff2a77a19002c30e5841897309cce6679f4505d53c8c33c237dd0f3e44edae","abstract_canon_sha256":"970473f92eedaa27373642cd389df1336ac22506514f54c8f6fe63613e7ef84a"},"schema_version":"1.0"},"canonical_sha256":"3007259afe44ac817e810a2bc8af2f286b852fb582e93a9a0d5bcd8b8a8e4707","source":{"kind":"arxiv","id":"0808.2356","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0808.2356","created_at":"2026-05-18T03:16:38Z"},{"alias_kind":"arxiv_version","alias_value":"0808.2356v1","created_at":"2026-05-18T03:16:38Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0808.2356","created_at":"2026-05-18T03:16:38Z"},{"alias_kind":"pith_short_12","alias_value":"GADSLGX6ISWI","created_at":"2026-05-18T12:25:57Z"},{"alias_kind":"pith_short_16","alias_value":"GADSLGX6ISWIC7UB","created_at":"2026-05-18T12:25:57Z"},{"alias_kind":"pith_short_8","alias_value":"GADSLGX6","created_at":"2026-05-18T12:25:57Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2008:GADSLGX6ISWIC7UBBIV4RLZPFB","target":"record","payload":{"canonical_record":{"source":{"id":"0808.2356","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2008-08-18T09:12:45Z","cross_cats_sorted":["cond-mat.mtrl-sci"],"title_canon_sha256":"92ff2a77a19002c30e5841897309cce6679f4505d53c8c33c237dd0f3e44edae","abstract_canon_sha256":"970473f92eedaa27373642cd389df1336ac22506514f54c8f6fe63613e7ef84a"},"schema_version":"1.0"},"canonical_sha256":"3007259afe44ac817e810a2bc8af2f286b852fb582e93a9a0d5bcd8b8a8e4707","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:16:38.954555Z","signature_b64":"oAHP+rpk7N3mn87orFDUztnJg3t8JpPgF08+PYnfYnNhPsxOUT7qYvcleImAJIrIYcI+ojY44R77LI3Qj8BtBw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"3007259afe44ac817e810a2bc8af2f286b852fb582e93a9a0d5bcd8b8a8e4707","last_reissued_at":"2026-05-18T03:16:38.953901Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:16:38.953901Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0808.2356","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":"2026-05-18T03:16:38Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"KHVhmKjVqiKc6f3Ea79CRQJ62b7DWbjpMafP0gP9FUNic89IShRNwnUsEX5gi5EpK5xSEcl5utxCcRzMkIWhBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T05:36:49.911502Z"},"content_sha256":"9a65d32dcfda249539db80ef48c276628d6af55cb07f99ca9b80569879c621bc","schema_version":"1.0","event_id":"sha256:9a65d32dcfda249539db80ef48c276628d6af55cb07f99ca9b80569879c621bc"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2008:GADSLGX6ISWIC7UBBIV4RLZPFB","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"A Ni-based Superconductor: the Heusler Compound ZrNi$_2$Ga","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.mtrl-sci"],"primary_cat":"cond-mat.supr-con","authors_text":"Claudia Felser*, Frederic Hardy, Gerhard H.Fecher, Hilbert von Loehneysen, Juergen Winterlik, Kai Grube, K. L. Holman, Martin Jourdan, R. J. Cava","submitted_at":"2008-08-18T09:12:45Z","abstract_excerpt":"This work reports on the novel Heusler superconductor ZrNi2Ga. Compared to other nickel-based superconductors with Heusler structure, ZrNi2Ga exhibits a relatively high superconducting transition temperature of Tc=2.9 K and an upper critical field of 1.5 T. Electronic structure calculations show that this relatively high transition temperature is caused by a van Hove singularity, which leads to an enhanced density of states at the Fermi energy. The van Hove singularity originates from a higher order valence instability at the L-point in the electronic structure. The enhanced density of states "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0808.2356","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":""},"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":"2026-05-18T03:16:38Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"IBaPWo8mGS6NOgdxW1NLwJz/jo1I35PvDlqE59VQSEnyKeKEKZmkGIlKOgX7K44ntfyk6OutfZIuRd5cl0aPBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T05:36:49.911848Z"},"content_sha256":"20c3ea0ead07cf1dd0e3e04b24d60017d6ada2f4ed8451a509e665bb68bb99f2","schema_version":"1.0","event_id":"sha256:20c3ea0ead07cf1dd0e3e04b24d60017d6ada2f4ed8451a509e665bb68bb99f2"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/GADSLGX6ISWIC7UBBIV4RLZPFB/bundle.json","state_url":"https://pith.science/pith/GADSLGX6ISWIC7UBBIV4RLZPFB/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/GADSLGX6ISWIC7UBBIV4RLZPFB/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":"2026-06-03T05:36:49Z","links":{"resolver":"https://pith.science/pith/GADSLGX6ISWIC7UBBIV4RLZPFB","bundle":"https://pith.science/pith/GADSLGX6ISWIC7UBBIV4RLZPFB/bundle.json","state":"https://pith.science/pith/GADSLGX6ISWIC7UBBIV4RLZPFB/state.json","well_known_bundle":"https://pith.science/.well-known/pith/GADSLGX6ISWIC7UBBIV4RLZPFB/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2008:GADSLGX6ISWIC7UBBIV4RLZPFB","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":"970473f92eedaa27373642cd389df1336ac22506514f54c8f6fe63613e7ef84a","cross_cats_sorted":["cond-mat.mtrl-sci"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2008-08-18T09:12:45Z","title_canon_sha256":"92ff2a77a19002c30e5841897309cce6679f4505d53c8c33c237dd0f3e44edae"},"schema_version":"1.0","source":{"id":"0808.2356","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0808.2356","created_at":"2026-05-18T03:16:38Z"},{"alias_kind":"arxiv_version","alias_value":"0808.2356v1","created_at":"2026-05-18T03:16:38Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0808.2356","created_at":"2026-05-18T03:16:38Z"},{"alias_kind":"pith_short_12","alias_value":"GADSLGX6ISWI","created_at":"2026-05-18T12:25:57Z"},{"alias_kind":"pith_short_16","alias_value":"GADSLGX6ISWIC7UB","created_at":"2026-05-18T12:25:57Z"},{"alias_kind":"pith_short_8","alias_value":"GADSLGX6","created_at":"2026-05-18T12:25:57Z"}],"graph_snapshots":[{"event_id":"sha256:20c3ea0ead07cf1dd0e3e04b24d60017d6ada2f4ed8451a509e665bb68bb99f2","target":"graph","created_at":"2026-05-18T03:16:38Z","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":"This work reports on the novel Heusler superconductor ZrNi2Ga. Compared to other nickel-based superconductors with Heusler structure, ZrNi2Ga exhibits a relatively high superconducting transition temperature of Tc=2.9 K and an upper critical field of 1.5 T. Electronic structure calculations show that this relatively high transition temperature is caused by a van Hove singularity, which leads to an enhanced density of states at the Fermi energy. The van Hove singularity originates from a higher order valence instability at the L-point in the electronic structure. The enhanced density of states ","authors_text":"Claudia Felser*, Frederic Hardy, Gerhard H.Fecher, Hilbert von Loehneysen, Juergen Winterlik, Kai Grube, K. L. Holman, Martin Jourdan, R. J. Cava","cross_cats":["cond-mat.mtrl-sci"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2008-08-18T09:12:45Z","title":"A Ni-based Superconductor: the Heusler Compound ZrNi$_2$Ga"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0808.2356","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":"sha256:9a65d32dcfda249539db80ef48c276628d6af55cb07f99ca9b80569879c621bc","target":"record","created_at":"2026-05-18T03:16:38Z","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":"970473f92eedaa27373642cd389df1336ac22506514f54c8f6fe63613e7ef84a","cross_cats_sorted":["cond-mat.mtrl-sci"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2008-08-18T09:12:45Z","title_canon_sha256":"92ff2a77a19002c30e5841897309cce6679f4505d53c8c33c237dd0f3e44edae"},"schema_version":"1.0","source":{"id":"0808.2356","kind":"arxiv","version":1}},"canonical_sha256":"3007259afe44ac817e810a2bc8af2f286b852fb582e93a9a0d5bcd8b8a8e4707","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"3007259afe44ac817e810a2bc8af2f286b852fb582e93a9a0d5bcd8b8a8e4707","first_computed_at":"2026-05-18T03:16:38.953901Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:16:38.953901Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"oAHP+rpk7N3mn87orFDUztnJg3t8JpPgF08+PYnfYnNhPsxOUT7qYvcleImAJIrIYcI+ojY44R77LI3Qj8BtBw==","signature_status":"signed_v1","signed_at":"2026-05-18T03:16:38.954555Z","signed_message":"canonical_sha256_bytes"},"source_id":"0808.2356","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:9a65d32dcfda249539db80ef48c276628d6af55cb07f99ca9b80569879c621bc","sha256:20c3ea0ead07cf1dd0e3e04b24d60017d6ada2f4ed8451a509e665bb68bb99f2"],"state_sha256":"888d942c2ab54f472046f27f9b49b1d768e03240310da653e20e442ca4237637"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"3EVBMNxkY2AUDx0tFNUGYF0PEgtBrPwXlMBhcYYFSl9bax2UWVpMIx1wth5wtytitj9sdbo5cdXmenFV7k7bBw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-03T05:36:49.913795Z","bundle_sha256":"fab6dde7bb6c963fed8c72566a448f6155893d5ccfa4ae7a283227e6919f90ca"}}