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Using this value we calculate the specific heat coefficient {\\gamma} theoretically as 10.97 mJ/ K2 mol and then systematically calculate the electron-phonon coupling constant {\\lambda} as 0.45. Finally applying these values in McMillan formula we get the superconducting critical temperature of HfZn2 as approximately 0.049 K."},"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":"1605.04841","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2016-05-16T17:11:14Z","cross_cats_sorted":[],"title_canon_sha256":"28860df38a7b8b572cccc9acc4586cdc07ce6a79864d7051897dd5849b277eba","abstract_canon_sha256":"a82f36cee02a9037c120f6473ac12f64451d930acfc5f1e9543a503bee4fc334"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:14:46.173332Z","signature_b64":"6cvPjptFuLfo9g5CLeHIeN5/mRudD/aduN5cP17qc11LEH4nhixuz8HBnmB+qqUtiYkoqd9O7BK7MU/0HDxIAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"da41681236ccda34423a76b4dcf6a029244b6551b62b7f016cde72c353b3367a","last_reissued_at":"2026-05-18T01:14:46.172699Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:14:46.172699Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Superconductivity at ~ 0.049 K in Laves phase HfZn2 predicted by first principles","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mtrl-sci","authors_text":"Md. 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