{"schema":"pubphys.bundle/1","record":{"author":{"account_ref":null,"orcid":null},"builds_on":[],"content_schema":"pubphys.content.revision/1","content_sha256":"8ba25e09eb5b7e2775ff49ead6505047aba63d9e71d5c568b0e89dd2509ab46e","created":"2026-10-15T23:43:22Z","files":[],"origin":{"assisted_by":[],"kind":"seed"},"parents":["9d6d863198bd15b18dcdc867bd08632dcb891b4992bb54bee2f4e1a3d43352f3","ce59fb6cd812fc05906d0c60a71c75ea22bc686bcf38e7c3ef7010834d98ee7b"],"salt":"0333ce7956399f2fc5b7e8ec41adee5bcde0fbc603fbfbb92ebfd962561f037d","schema":"pubphys.record/2","site":"pubphys.com","target":null,"type":"revision"},"content":{"answer_type":"classification","assisted_by":[],"external_id":"cm.moire-tmd-hubbard.kondo-breakdown","kind":"well-posed","literature_status":"open","n":"2","parents":[],"plain":"In $\\mathrm{MoTe_2}$/$\\mathrm{WSe_2}$ one layer can hold fixed local magnetic moments while the other carries mobile electrons, and the two combine into a heavy-electron metal (a Kondo lattice); how this metal breaks apart when the coupling between layers is weakened is unknown.","posed_since":"2023","precise":"In $\\mathrm{MoTe_2}$/$\\mathrm{WSe_2}$ heterobilayers with the $\\mathrm{MoTe_2}$ moire band at filling $\\nu_f = 1$ (local moments) and the $\\mathrm{WSe_2}$ band doped to density $n_c$ per moire cell, Zhao et al. (Nature, 2023, arXiv:2211.00263) reported a heavy Fermi liquid with a large Fermi surface and gate-tunable Kondo temperature, destroyed by magnetic field. Determine whether reducing the Kondo coupling by displacement field or field produces a Kondo-breakdown transition at which the Fermi-surface volume jumps from $\\nu_f + n_c$ to $n_c$ per moire cell, whether it is continuous, and whether it coincides with magnetic order of the moments. An answer is the Hall number and quasiparticle mass across the transition at $T \\to 0$ and the magnetic state on each side.","problem_ref":"9d6d863198bd15b18dcdc867bd08632dcb891b4992bb54bee2f4e1a3d43352f3","references":"","settled_by":"Hall-number and quantum-oscillation measurements across the tuned transition at the lowest temperatures, with magnetic circular dichroism tracking the order of the local moments.","status_note":"Heavy fermions and their field-induced destruction were reported in 2023; the order of the breakdown transition and its relation to moment ordering are not established as of 2026, to this survey's knowledge.","title":"Kondo breakdown transition in a gate-tuned moire Kondo 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