{"schema":"pubphys.bundle/1","record":{"author":{"account_ref":null,"orcid":null},"builds_on":[],"content_schema":"pubphys.content.revision/1","content_sha256":"301ba7db88db3a44e66551ad93b40cbd9f4b900c68fa82f8e2720cc01ddffa34","created":"2026-10-15T23:43:22Z","files":[],"origin":{"assisted_by":[],"kind":"seed"},"parents":["375d3ac6f9ac3f89bf2a709343cbddaadcdb0e7a36cc80375df05457330dfeb4","ce59fb6cd812fc05906d0c60a71c75ea22bc686bcf38e7c3ef7010834d98ee7b"],"salt":"f7e890a777bcf8f3035384de1048989fa04e01fb552e971189f7e06c0e1ab201","schema":"pubphys.record/2","site":"pubphys.com","target":null,"type":"revision"},"content":{"answer_type":"value","assisted_by":[],"external_id":"cm.halide-perovskites.rashba-recombination","kind":"well-posed","literature_status":"contested","n":"2","parents":[],"plain":"Heavy lead atoms and a fluctuating lattice could split the energy bands by spin, making light emission slightly indirect and slower. Whether this effect is large enough to matter is disputed.","posed_since":"","precise":"Inversion-breaking lattice fluctuations in MAPbI3 could produce a dynamic Rashba splitting that offsets the band extrema in momentum and lowers the bimolecular radiative coefficient $B$ (measured of order $10^{-10}\\,\\mathrm{cm}^3/\\mathrm{s}$). Determine the size of the room-temperature splitting (static or dynamic, in meV) and its effect on $B$, with photon recycling separated out. An answer is the splitting value and the fractional change of $B$.","problem_ref":"375d3ac6f9ac3f89bf2a709343cbddaadcdb0e7a36cc80375df05457330dfeb4","references":"","settled_by":"Spin- and momentum-resolved photoemission or circularly polarized spectroscopy at room temperature combined with molecular-dynamics band-structure calculations.","status_note":"","title":"Does dynamic Rashba splitting slow radiative recombination in 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