{"record":{"author":{"account_ref":null,"orcid":null},"builds_on":[],"content_schema":"pubphys.content.revision/1","content_sha256":"7db508fd04dc6deecaedfb540252e45cf2df4f4f7e1ce16a88d71d0de7100eab","created":"2026-10-03T07:18:01Z","files":[],"origin":{"assisted_by":[],"kind":"seed"},"parents":["5475cf5dc5b1a72283d26dc95dc6e00d7ea4e00096a7c6492e409a1816eeb011"],"salt":"1eecc9724361261c2ad3f3968f05de3fbf079a8f2e48a2e33f8abf2baca74010","schema":"pubphys.record/2","site":"pubphys.com","target":null,"type":"revision"},"content":{"answer_type":"yes-no","assisted_by":[],"external_id":"cm.twisted-tmd.zero-field-cfl","kind":"well-posed","literature_status":"partially-resolved","n":"1","parents":[],"plain":"At half filling of the lowest twisted-MoTe2 band, theory predicts a metal of composite fermions (electrons bound to vortices) like the one in a half-filled Landau level, but with no applied field.","posed_since":"2023","precise":"In twisted bilayer MoTe2 at $\\theta \\sim 3.5-3.9\\,\\mathrm{deg}$ near hole filling $\\nu = 1/2$ and $3/4$ of the first Chern band, determine whether the compressible state is an anomalous composite Fermi liquid with Fermi wavevector $k_F = \\sqrt{4 \\pi n_{cf}}$, $n_{cf}$ the composite-fermion density, or an ordinary Fermi liquid with Berry curvature. An answer is a direct measurement of the composite-fermion Fermi surface.","problem_ref":null,"references":"","settled_by":"Commensurability oscillations in an imposed periodic potential, or surface-acoustic-wave resonances, showing $k_{F}$ fixed by the composite-fermion density.","status_note":"2023-2024 transport found anomalous Hall resistance near $2h/e^{2}$ at $\\nu = 1/2$, consistent with a composite Fermi liquid; no direct Fermi-surface measurement as of 2026.","title":"Composite Fermi liquid at half filling without magnetic field","topic_ref":"ee366246d836c5c3de50c54cd6e2c171a9e583366ed05df246a7c45c4b74ffe1"},"attested":{"attestation":{"batch":null,"client_id":null,"id_token_sha256":null,"kind":"platform"},"record_hash":"29f3d60c8bdad9401bb25c10bac6df31aa5f73e058139e8370c2e3888b2ec22e","schema":"pubphys.attested/1"},"envelope":{"attested_hash":"d0779be8fcf3236c148543cb9d305d18bc2e6fe82ca1e7b18c30065bf46b7539","platform_signature":{"key_id":"c6afc19b31429869751f06879c75cd64ea92654423d15b44be775bf1310a60da","sig":"VU_YKimnqeHTovOtFan98fwQFNuQYsBV0gZHHPtqUBCTS59g-FdcECZ17bZc2WaRwWbElm5eSM2-IufyK1s7Dg"},"schema":"pubphys.envelope/1"},"record_hash":"29f3d60c8bdad9401bb25c10bac6df31aa5f73e058139e8370c2e3888b2ec22e","leaf_index":1205}