{"record":{"author":{"account_ref":null,"orcid":null},"builds_on":[],"content_schema":"pubphys.content.revision/1","content_sha256":"b939f5545eb39c1285cd91b89aeffec57fba520a4defb7dbf36c4f0ef26d4736","created":"2026-10-03T07:18:01Z","files":[],"origin":{"assisted_by":[],"kind":"seed"},"parents":["5475cf5dc5b1a72283d26dc95dc6e00d7ea4e00096a7c6492e409a1816eeb011","55615a03bfc157c39f29e579b86af0cdfab4347440038fffed38db8a9a205062"],"salt":"f04fae40a0b778ce7e9051f68bcc66a434b9350240029fd14e3075384fc56710","schema":"pubphys.record/2","site":"pubphys.com","target":null,"type":"revision"},"content":{"answer_type":"yes-no","assisted_by":[],"external_id":"cm.strange-metals.quasiparticle-charge","kind":"well-posed","literature_status":"contested","n":"1","parents":[{"note":"","parent_revision":"55615a03bfc157c39f29e579b86af0cdfab4347440038fffed38db8a9a205062","relation":"special_case"}],"plain":"Shot noise, the current fluctuation caused by charge arriving in discrete packets, reveals whether current is carried by electron-like particles; in one strange metal the noise was far smaller than expected.","posed_since":"2023","precise":"Measure the Fano factor $F = S_I/(2 e I)$ in mesoscopic wires of strange metals in the $T$-linear regime and determine whether suppression of $F$ below the Fermi-liquid values ($1/3$ for elastic diffusive transport, $\\sqrt{3}/4$ for hot electrons) reflects the absence of quasiparticles or electron-phonon energy relaxation. An answer is a cross-material data set with independently measured electron-phonon length plus a theory of shot noise without quasiparticles that matches it.","problem_ref":null,"references":"","settled_by":"Length- and temperature-dependent shot-noise measurements in at least two strange-metal families with control wires of a conventional metal in the same geometry.","status_note":"Strongly suppressed shot noise was reported in YbRh2Si2 nanowires in 2023; whether electron-phonon relaxation can explain it is debated.","title":"Do strange metals carry current in electron-like quasiparticles","topic_ref":"bfd78216bee7da77225ac2973e7d9a78ff7a1c51ad977d9d7c3327e70d7ac174"},"attested":{"attestation":{"batch":null,"client_id":null,"id_token_sha256":null,"kind":"platform"},"record_hash":"355a05d06221cdd217d9ce6a2f32abf9a59ab515f514f1908961cf5d6771e61e","schema":"pubphys.attested/1"},"envelope":{"attested_hash":"4bfb0c4b8e6d6f3632fd1fbf155b368dad262a7cf088791f1576022b3bf6c65f","platform_signature":{"key_id":"c6afc19b31429869751f06879c75cd64ea92654423d15b44be775bf1310a60da","sig":"-pJIfY4lbtGKPvjOHFdlANIphn2Mowp05Z5m_pQyt0YiSZ7Bs8MUqTOQVaZg3SJxjQ289xRpjCgvilJsej8CCg"},"schema":"pubphys.envelope/1"},"record_hash":"355a05d06221cdd217d9ce6a2f32abf9a59ab515f514f1908961cf5d6771e61e","leaf_index":1183}