{"schema":"pubphys.bundle/1","record":{"author":{"account_ref":null,"orcid":null},"builds_on":[],"content_schema":"pubphys.content.revision/1","content_sha256":"b2f873e43b83b9f2557947e236db0fb1bf670ac8035cec214e9a71ae3c0c4076","created":"2026-10-15T23:43:22Z","files":[],"origin":{"assisted_by":[],"kind":"seed"},"parents":["088e2aa1c5f26054ade3d06b6f66690b1ba9b7b55aa8facb52598fb160b2c376","ce59fb6cd812fc05906d0c60a71c75ea22bc686bcf38e7c3ef7010834d98ee7b"],"salt":"c152e1235a81a885d870346d08f581e2e7388269c61df2f3fe7ff10e4532b765","schema":"pubphys.record/2","site":"pubphys.com","target":null,"type":"revision"},"content":{"answer_type":"identification","assisted_by":[],"external_id":"cm.twisted-tmd.fractional-spin-hall","kind":"phenomenon","literature_status":"contested","n":"2","parents":[],"plain":"At three holes per moire cell, twisted $\\mathrm{MoTe_2}$ near 2.1 degrees conducts along its edges with $3/2$ times the basic conductance quantum $e^{2}/h$ while keeping time-reversal symmetry (no preferred direction of time), and no accepted theory explains it.","posed_since":"2024","precise":"Kang et al. (Nature 628, 522, 2024) reported in 2.1 deg twisted bilayer $\\mathrm{MoTe_2}$ at hole filling $\\nu = 3$ a state with vanishing Hall response and edge conductance near $\\left(3/2\\right)e^2/h$, interpreted as a fractional quantum spin Hall state, possibly a time-reversal pair of $3/2$ fractional Chern insulators. Identify its topological order (for example a time-reversal-symmetric non-Abelian state built from two Moore-Read halves, or an Abelian fractional topological insulator) and its edge theory, and determine whether the edge conductance is quantized. An answer is a topological order whose predicted edge conductance, quasiparticle charge and spin response match data.","problem_ref":"088e2aa1c5f26054ade3d06b6f66690b1ba9b7b55aa8facb52598fb160b2c376","references":"","settled_by":"Reproduction in independent devices plus edge shot-noise and nonlocal transport fixing the quasiparticle charge and edge-mode count.","status_note":"2024-2026 theory proposes non-Abelian spin Hall states (e.g., arXiv:2406.14617) and a 2026 preprint (arXiv:2601.18508) reports a fractional topological insulator candidate; the state is not identified.","title":"Nature of the fractional quantum spin Hall state in twisted 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