{"record":{"author":{"account_ref":null,"orcid":null},"builds_on":[],"content_schema":"pubphys.content.revision/1","content_sha256":"15b31cd854f311dacbf2942971b5156b7f0f5b412910f134a871bace90596c82","created":"2026-10-15T23:43:22Z","files":[],"origin":{"assisted_by":[],"kind":"seed"},"parents":["62ee513cb3a66d0eea3a54850d74edafc507be20df4dc6d889e429f9b0169d81","ce59fb6cd812fc05906d0c60a71c75ea22bc686bcf38e7c3ef7010834d98ee7b"],"salt":"3aae9179cbc379b5010b97832c78cc217c8beac8f29cff85ce47d680a2a814df","schema":"pubphys.record/2","site":"pubphys.com","target":null,"type":"revision"},"content":{"answer_type":"yes-no","assisted_by":[],"external_id":"cm.kagome-metals.cdw-trsb","kind":"well-posed","literature_status":"contested","n":"2","parents":[],"plain":"Some experiments suggest that the charge order in $\\mathrm{CsV_3Sb_5}$ comes with tiny circulating electric currents (loop currents) that break time-reversal symmetry, while sensitive optical tests see nothing.","posed_since":"2021","precise":"Determine whether the $2x2$ charge-density-wave state of $\\mathrm{CsV_3Sb_5}$ ($T_{\\mathrm{CDW}} = 94\\,\\mathrm{K}$) breaks time-reversal symmetry, as in loop-current (chiral flux) phases. Reconcile muSR and field-trained transport and optical signals with high-resolution polar Kerr data and spin-polarized STM that found no signal. An answer is a symmetry-resolved measurement on the same crystals with sensitivity sufficient to detect the orbital moments predicted by loop-current theory.","problem_ref":"62ee513cb3a66d0eea3a54850d74edafc507be20df4dc6d889e429f9b0169d81","references":"","settled_by":"Kerr, muSR and neutron or NMR measurements on the same crystals, with a calibrated sensitivity below the predicted loop-current moment.","status_note":"High-resolution polar Kerr studies (2022, 2025) found no signal, while muSR and some optical and transport data report time-reversal breaking.","title":"Does the charge order in $\\mathrm{CsV_3Sb_5}$ break time-reversal symmetry?","topic_ref":null},"attested":{"attestation":{"batch":null,"client_id":null,"id_token_sha256":null,"kind":"platform"},"record_hash":"108641af66ecd7cc057546876df2a96f366c0ac5e11c162f1578c0b33dcf1251","schema":"pubphys.attested/1"},"envelope":{"attested_hash":"0462dd06f5fbf09c670afef7aa3578b7ef1bf1753b5d629a0cddf9a949cd8d1d","platform_signature":{"key_id":"c6afc19b31429869751f06879c75cd64ea92654423d15b44be775bf1310a60da","sig":"vg0OEhfHfXt9K0o-NibHhF2RzkMtTeSeYfTWVxIfE4cEYTo3MDTt8ju7fdluzhJWLZl69hJdzvBOSWoT5k8WAQ"},"schema":"pubphys.envelope/1"},"record_hash":"108641af66ecd7cc057546876df2a96f366c0ac5e11c162f1578c0b33dcf1251","leaf_index":2888}