{"record":{"author":{"account_ref":null,"orcid":null},"builds_on":[],"content_schema":"pubphys.content.revision/1","content_sha256":"5b974019edeecbef812179c50503e4f71f7d82df8d78a74d52c2385cd259e8af","created":"2026-10-15T23:43:22Z","files":[],"origin":{"assisted_by":[],"kind":"seed"},"parents":["a2658f3a01902ae9904f64492911f8a1b1e2f4ac9554a547b6e4692c73a43fcd","ce59fb6cd812fc05906d0c60a71c75ea22bc686bcf38e7c3ef7010834d98ee7b"],"salt":"c21a920c4f93758c3b14c55f0845c035ac2af50011b79f0702ec78a6cb039ca1","schema":"pubphys.record/2","site":"pubphys.com","target":null,"type":"revision"},"content":{"answer_type":"mechanism","assisted_by":[],"external_id":"cm.dilute-superconductivity.laalo3-dome","kind":"phenomenon","literature_status":"open","n":"2","parents":[],"plain":"Where $\\mathrm{LaAlO_3}$ meets $\\mathrm{SrTiO_3}$, a thin conducting sheet forms that superconducts below about $0.3\\,\\mathrm{K}$, and a gate voltage tunes its transition temperature up and then down. What causes this dome-shaped curve is unresolved.","posed_since":"2008","precise":"The two-dimensional electron gas at (001) $\\mathrm{LaAlO_3}$/$\\mathrm{SrTiO_3}$, with sheet density $n_{s}$ of order $10^{13}\\,\\mathrm{cm}^{-2}$, shows a gate-tuned dome $T_{c}(V_{g})$ with maximum about $0.2\\ \\text{to}\\ 0.3\\,\\mathrm{K}$ near a Lifshitz transition where $d_{xz}/d_{yz}$ subbands fill and Rashba spin-orbit coupling grows. Determine the cause of the decrease of $T_{c}$ on both sides of the maximum (multiband pairing, loss of superfluid stiffness and phase fluctuations, change of dielectric screening) from a calculation matching $T_{c}(n_{s})$, superfluid stiffness and tunneling gap data. An answer is a quantitative model of the dome.","problem_ref":"a2658f3a01902ae9904f64492911f8a1b1e2f4ac9554a547b6e4692c73a43fcd","references":"","settled_by":"Simultaneous measurement of gap, superfluid stiffness and $T_{c}$ versus gate voltage on one device, reproduced by a model.","status_note":"","title":"Origin of the superconducting dome at $\\mathrm{LaAlO_3}$/$\\mathrm{SrTiO_3}$ interfaces","topic_ref":null},"attested":{"attestation":{"batch":null,"client_id":null,"id_token_sha256":null,"kind":"platform"},"record_hash":"e6d3dade34ce57a85b249f7d1e3d12e551415667a86e64488be5675688ba34c7","schema":"pubphys.attested/1"},"envelope":{"attested_hash":"7d9bb1c0a59c51eed8ee64ca22002d771e563400911730d8fda3b5a22c251cb0","platform_signature":{"key_id":"c6afc19b31429869751f06879c75cd64ea92654423d15b44be775bf1310a60da","sig":"RbQ0tH0PbNE7K23Lhrqrx9MC95V0sx8-GpCaPXlsaf_VNed7ZhSrmyvYvtexjoOQQl_qGzy44GDnBLzi_z4SDQ"},"schema":"pubphys.envelope/1"},"record_hash":"e6d3dade34ce57a85b249f7d1e3d12e551415667a86e64488be5675688ba34c7","leaf_index":2746}