{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2008:GADSLGX6ISWIC7UBBIV4RLZPFB","short_pith_number":"pith:GADSLGX6","schema_version":"1.0","canonical_sha256":"3007259afe44ac817e810a2bc8af2f286b852fb582e93a9a0d5bcd8b8a8e4707","source":{"kind":"arxiv","id":"0808.2356","version":1},"attestation_state":"computed","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 "},"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":"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"},"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"},"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"},"aliases":[{"alias_kind":"arxiv","alias_value":"0808.2356","created_at":"2026-05-18T03:16:38.954011+00:00"},{"alias_kind":"arxiv_version","alias_value":"0808.2356v1","created_at":"2026-05-18T03:16:38.954011+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0808.2356","created_at":"2026-05-18T03:16:38.954011+00:00"},{"alias_kind":"pith_short_12","alias_value":"GADSLGX6ISWI","created_at":"2026-05-18T12:25:57.157939+00:00"},{"alias_kind":"pith_short_16","alias_value":"GADSLGX6ISWIC7UB","created_at":"2026-05-18T12:25:57.157939+00:00"},{"alias_kind":"pith_short_8","alias_value":"GADSLGX6","created_at":"2026-05-18T12:25:57.157939+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/GADSLGX6ISWIC7UBBIV4RLZPFB","json":"https://pith.science/pith/GADSLGX6ISWIC7UBBIV4RLZPFB.json","graph_json":"https://pith.science/api/pith-number/GADSLGX6ISWIC7UBBIV4RLZPFB/graph.json","events_json":"https://pith.science/api/pith-number/GADSLGX6ISWIC7UBBIV4RLZPFB/events.json","paper":"https://pith.science/paper/GADSLGX6"},"agent_actions":{"view_html":"https://pith.science/pith/GADSLGX6ISWIC7UBBIV4RLZPFB","download_json":"https://pith.science/pith/GADSLGX6ISWIC7UBBIV4RLZPFB.json","view_paper":"https://pith.science/paper/GADSLGX6","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=0808.2356&json=true","fetch_graph":"https://pith.science/api/pith-number/GADSLGX6ISWIC7UBBIV4RLZPFB/graph.json","fetch_events":"https://pith.science/api/pith-number/GADSLGX6ISWIC7UBBIV4RLZPFB/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/GADSLGX6ISWIC7UBBIV4RLZPFB/action/timestamp_anchor","attest_storage":"https://pith.science/pith/GADSLGX6ISWIC7UBBIV4RLZPFB/action/storage_attestation","attest_author":"https://pith.science/pith/GADSLGX6ISWIC7UBBIV4RLZPFB/action/author_attestation","sign_citation":"https://pith.science/pith/GADSLGX6ISWIC7UBBIV4RLZPFB/action/citation_signature","submit_replication":"https://pith.science/pith/GADSLGX6ISWIC7UBBIV4RLZPFB/action/replication_record"}},"created_at":"2026-05-18T03:16:38.954011+00:00","updated_at":"2026-05-18T03:16:38.954011+00:00"}