{"record":{"author":{"account_ref":null,"orcid":null},"builds_on":[],"content_schema":"pubphys.content.revision/1","content_sha256":"cddb6a37a72e6719b44a181ad30fd3bc9230d3ecc33aab28e1efba1994a3057a","created":"2026-10-15T23:43:22Z","files":[],"origin":{"assisted_by":[],"kind":"seed"},"parents":["387c78650fe6ba2d48d45d84bf572342120c702dbd87fb90db1537ccf4db9a11","ce59fb6cd812fc05906d0c60a71c75ea22bc686bcf38e7c3ef7010834d98ee7b"],"salt":"90f5eabe0e40ef9de810df5eceefce0b228567b1f167e5c1cd44caf5e12c93c9","schema":"pubphys.record/2","site":"pubphys.com","target":null,"type":"revision"},"content":{"answer_type":"mechanism","assisted_by":[],"external_id":"cm.sit-anomalous-metal.cooper-pair-insulator","kind":"phenomenon","literature_status":"contested","n":"2","parents":[],"plain":"On the insulating side, some films such as amorphous indium oxide and titanium nitride show a giant resistance peak in a magnetic field and signs that electrons are still bound in pairs. How paired electrons form an insulator, and what sets its conduction, is open.","posed_since":"","precise":"In amorphous InOx, TiN and nanopatterned Bi films on the insulating side of the field-tuned transition, $\\rho \\sim \\exp(T_{0}/T)$ with $T_{0}$ peaking at a field $B_{\\mathrm{peak}}$, the magnetoresistance peak spans several orders of magnitude, and patterned films show $h/2e$ periodic magnetoresistance (Stewart et al. 2007). Explain the pair-localization mechanism and $T_{0}(B)$, and determine whether abrupt current jumps in the $I-V$ curves reflect electron overheating (Altshuler, Kravtsov, Lerner and Aleiner 2009) or a distinct phase (proposed superinsulator).","problem_ref":"387c78650fe6ba2d48d45d84bf572342120c702dbd87fb90db1537ccf4db9a11","references":"","settled_by":"Electron-temperature measurement during nonlinear transport plus local probes of pair density in the insulator, compared with a theory of localized preformed pairs.","status_note":"","title":"Nature of the Cooper-pair insulator beyond the transition","topic_ref":null},"attested":{"attestation":{"batch":null,"client_id":null,"id_token_sha256":null,"kind":"platform"},"record_hash":"c2f9490e0a836a9326143ed47eb66f31ebf542a88d09d21e55ba40fa6503b1eb","schema":"pubphys.attested/1"},"envelope":{"attested_hash":"603d42767fa3c901af0b474200200846e5e8a72486c44db246f865e9104af4e1","platform_signature":{"key_id":"c6afc19b31429869751f06879c75cd64ea92654423d15b44be775bf1310a60da","sig":"JDerW_XpRiHDCR-uKFpJdJH4YCnjMCOhCmsCtKxbqsKOTbs5fn5SpUMqtsQiMrsvljC5necn3o_W8sXVxCIoDA"},"schema":"pubphys.envelope/1"},"record_hash":"c2f9490e0a836a9326143ed47eb66f31ebf542a88d09d21e55ba40fa6503b1eb","leaf_index":3030}