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Based on these calculations, we explain the absence of medium-$T_C$ superconductivity for $BeB_2$, $AlB_2$ $ScB_2$ and $YB_2$. The simulation of a number of $MgB_2$-based ternary systems using a supercell approach demonstrates that (i) the electron doping of $MgB_2$ (i.e., $MgB_{2-y}X_y$ with X=Be, C, N, O) and the creation of isoe"},"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":"cond-mat/0103157","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"cond-mat.supr-con","submitted_at":"2001-03-07T19:30:02Z","cross_cats_sorted":[],"title_canon_sha256":"d964ce02c4749a23dfd98e2f19eac259eea0ce94b0d7ea80721798fd58286931","abstract_canon_sha256":"1a64c3496fd755f36099b55b7014a61c8c4fda3ad2c2cd6a84b521497d1e597f"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T16:25:06.745746Z","signature_b64":"vpSXMt3+BnIJYDDzpEG8mkhC+INzUoWY8m4R2abTXy1PI0IBMEPm4Y76CKm+dGqmVXDr4ao//zLXTY+0XG3LDg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"1eb72ed4f2c9e60003456ab30f8089eb6977ba3c2763c2804f78bd791600ebd2","last_reissued_at":"2026-07-04T16:25:06.745351Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T16:25:06.745351Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Electronic structure of superconducting MgB2 and related binary and ternary borides","license":"","headline":"","cross_cats":[],"primary_cat":"cond-mat.supr-con","authors_text":"A.J. 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The simulation of a number of $MgB_2$-based ternary systems using a supercell approach demonstrates that (i) the electron doping of $MgB_2$ (i.e., $MgB_{2-y}X_y$ with X=Be, C, N, O) and the creation of isoe"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"cond-mat/0103157","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/cond-mat/0103157/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"},"aliases":[{"alias_kind":"arxiv","alias_value":"cond-mat/0103157","created_at":"2026-07-04T16:25:06.745414+00:00"},{"alias_kind":"arxiv_version","alias_value":"cond-mat/0103157v1","created_at":"2026-07-04T16:25:06.745414+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.cond-mat/0103157","created_at":"2026-07-04T16:25:06.745414+00:00"},{"alias_kind":"pith_short_12","alias_value":"D23S5VHSZHTA","created_at":"2026-07-04T16:25:06.745414+00:00"},{"alias_kind":"pith_short_16","alias_value":"D23S5VHSZHTAAA2F","created_at":"2026-07-04T16:25:06.745414+00:00"},{"alias_kind":"pith_short_8","alias_value":"D23S5VHS","created_at":"2026-07-04T16:25:06.745414+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/D23S5VHSZHTAAA2FNKZQ7AEJ5N","json":"https://pith.science/pith/D23S5VHSZHTAAA2FNKZQ7AEJ5N.json","graph_json":"https://pith.science/api/pith-number/D23S5VHSZHTAAA2FNKZQ7AEJ5N/graph.json","events_json":"https://pith.science/api/pith-number/D23S5VHSZHTAAA2FNKZQ7AEJ5N/events.json","paper":"https://pith.science/paper/D23S5VHS"},"agent_actions":{"view_html":"https://pith.science/pith/D23S5VHSZHTAAA2FNKZQ7AEJ5N","download_json":"https://pith.science/pith/D23S5VHSZHTAAA2FNKZQ7AEJ5N.json","view_paper":"https://pith.science/paper/D23S5VHS","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=cond-mat/0103157&json=true","fetch_graph":"https://pith.science/api/pith-number/D23S5VHSZHTAAA2FNKZQ7AEJ5N/graph.json","fetch_events":"https://pith.science/api/pith-number/D23S5VHSZHTAAA2FNKZQ7AEJ5N/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/D23S5VHSZHTAAA2FNKZQ7AEJ5N/action/timestamp_anchor","attest_storage":"https://pith.science/pith/D23S5VHSZHTAAA2FNKZQ7AEJ5N/action/storage_attestation","attest_author":"https://pith.science/pith/D23S5VHSZHTAAA2FNKZQ7AEJ5N/action/author_attestation","sign_citation":"https://pith.science/pith/D23S5VHSZHTAAA2FNKZQ7AEJ5N/action/citation_signature","submit_replication":"https://pith.science/pith/D23S5VHSZHTAAA2FNKZQ7AEJ5N/action/replication_record"}},"created_at":"2026-07-04T16:25:06.745414+00:00","updated_at":"2026-07-04T16:25:06.745414+00:00"}