{"record":{"author":{"account_ref":null,"orcid":null},"builds_on":[],"content_schema":"pubphys.content.topic/1","content_sha256":"80c40fb341e0d40b4e632c8bfb344487122de1922fa3ceb0977932343d8510a2","created":"2026-10-03T07:17:51Z","files":[],"origin":{"assisted_by":[],"kind":"seed"},"parents":[],"salt":"abfce3abfc12aa7c88f80e5afc47eadcda9f744a9c5fd07e958f89e1c733d04b","schema":"pubphys.record/2","site":"pubphys.com","target":null,"type":"topic"},"content":{"external_id":"cm.nickelates","field":"cm","n":"1","review_cite":"H. Sun et al., Signatures of superconductivity near 80 K in a nickelate under high pressure, Nature, 2023","review_link":"https://doi.org/10.1038/s41586-023-06408-7","review_verified":"true","summary":"Nickel oxides built like cuprates also superconduct: infinite-layer films such as Nd0.8Sr0.2NiO2 below about $15\\,\\mathrm{K}$ (near $40\\,\\mathrm{K}$ in samarium-based films), and bilayer La3Ni2O7 near $80\\,\\mathrm{K}$ under about $140\\,\\mathrm{kbar}$ (up to about $96\\,\\mathrm{K}$ in 2025 reports), with onset above $60\\,\\mathrm{K}$ in compressed thin films at normal pressure. Why they superconduct, and how high the transition temperature $T_c$ can go, are open questions.","title":"Nickelate superconductors: infinite-layer and bilayer families","topic_ref":null,"why":"They are the closest chemical relatives of the cuprates and a second family with $T_{\\mathrm{c}}$ above 77 K, so comparing them separates generic from material-specific features of high-$T_{\\mathrm{c}}$ pairing."},"attested":{"attestation":{"batch":null,"client_id":null,"id_token_sha256":null,"kind":"platform"},"record_hash":"1addbb7974855cb74617281e1add5f43c41622b4152f1b5d331c3da3827c5d62","schema":"pubphys.attested/1"},"envelope":{"attested_hash":"e5cfc706281695642fd853f4f9c6922acbce83a7f826061ff135432cddf608b1","platform_signature":{"key_id":"c6afc19b31429869751f06879c75cd64ea92654423d15b44be775bf1310a60da","sig":"uxQVXzY36MLsn2RlmePzR6sAWhAfx40gnAtRYG7IbysUOAeNU1O-RaAZAI1r0CA4SMH2J_Xgj8xjLbkHD-M8DQ"},"schema":"pubphys.envelope/1"},"record_hash":"1addbb7974855cb74617281e1add5f43c41622b4152f1b5d331c3da3827c5d62","leaf_index":159}