{"record":{"author":{"account_ref":null,"orcid":null},"builds_on":[],"content_schema":"pubphys.content.revision/1","content_sha256":"e022236ae0b1faa3e3b074ba95cef9ec127ad89f058bd884bd0155479ab4f8d9","created":"2026-10-03T07:18:00Z","files":[],"origin":{"assisted_by":[],"kind":"seed"},"parents":["5475cf5dc5b1a72283d26dc95dc6e00d7ea4e00096a7c6492e409a1816eeb011"],"salt":"4c1ffdccdede2e3adadca36ceb13493854c7fa76eace9479b4536c343c536afa","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":"1","parents":[],"plain":"Some experiments suggest that the charge order in CsV3Sb5 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 CsV3Sb5 ($T_{\\mathrm{CDW}} = 94\\,\\mathrm{K}$) 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":null,"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 CsV3Sb5 break time-reversal symmetry","topic_ref":"b07aceae6ac0e1690fea48db269288e8ac55a50f722f8f0e6cf26c1685ae1e5a"},"attested":{"attestation":{"batch":null,"client_id":null,"id_token_sha256":null,"kind":"platform"},"record_hash":"62ee513cb3a66d0eea3a54850d74edafc507be20df4dc6d889e429f9b0169d81","schema":"pubphys.attested/1"},"envelope":{"attested_hash":"c7437eb76c688b52d14a17b83120ad4eb97ceea20c614af7dbd9721e246a2338","platform_signature":{"key_id":"c6afc19b31429869751f06879c75cd64ea92654423d15b44be775bf1310a60da","sig":"VXj9hecx8lIMv5V-rQ4cdLc4HgUihy3kZBiCYrf31kzC8mkO_jb2jWqvgbzML3ror4rpyVnR4R1ykRc8yngYDQ"},"schema":"pubphys.envelope/1"},"record_hash":"62ee513cb3a66d0eea3a54850d74edafc507be20df4dc6d889e429f9b0169d81","leaf_index":1050}