{"record":{"author":{"account_ref":null,"orcid":null},"builds_on":[],"content_schema":"pubphys.content.revision/1","content_sha256":"45ec90549e9cb0afea6ec2d28edd3133d12578d2686e74444e8a35bd0407a99c","created":"2026-10-15T23:43:22Z","files":[],"origin":{"assisted_by":[],"kind":"seed"},"parents":["4fb3eff42ed30f617a718777d526b5b5b857a78e92bdd6d3838e2e94fc937ae3","ce59fb6cd812fc05906d0c60a71c75ea22bc686bcf38e7c3ef7010834d98ee7b"],"salt":"80ca09660ce9dcd0b6d510fe3eb752525247e9305dbf11c213c72a7270c995f1","schema":"pubphys.record/2","site":"pubphys.com","target":null,"type":"revision"},"content":{"answer_type":"identification","assisted_by":[],"external_id":"cm.insulator-quantum-oscillations.wte2-insulating-landau","kind":"well-posed","literature_status":"open","n":"2","parents":[],"plain":"Monolayer $\\mathrm{WTe_2}$, an insulator in its interior, shows resistance oscillations starting at a weak magnetic field, as if it contained very mobile particles. What these particles are is unknown.","posed_since":"2021","precise":"In gated monolayer $\\mathrm{WTe_2}$ near charge neutrality, where the bulk is insulating (a 2D topological insulator, also proposed as an excitonic insulator), resistance oscillates periodically in $1/B$ from an onset of $\\sim 5 \\times 10^{3}\\,\\mathrm{G}$ (Wang et al. 2021), and thermopower oscillates with sign changes (2024). Identify the mobile fermions responsible (neutral fermions, excitons, or charged carriers of a hidden Fermi surface) and explain why oscillations appear while the bulk resistance stays large.","problem_ref":"4fb3eff42ed30f617a718777d526b5b5b857a78e92bdd6d3838e2e94fc937ae3","references":"","settled_by":"Simultaneous thermodynamic (capacitance, magnetization) and transport oscillation measurements versus gate density, with local probes showing whether a Fermi surface of charged carriers is present.","status_note":"Sign-alternating thermopower oscillations in the insulating state were reported in 2024 (Tang et al., arXiv 2405.09665).","title":"What carries Landau quantization in insulating monolayer $\\mathrm{WTe_2}$?","topic_ref":null},"attested":{"attestation":{"batch":null,"client_id":null,"id_token_sha256":null,"kind":"platform"},"record_hash":"35976e21fdc15be975d926b0575fbd4cb093a1b7152bbe507f6ac331da6cceb7","schema":"pubphys.attested/1"},"envelope":{"attested_hash":"5cff7597280d08de807b73d39dc8b7b102feac21add3ede30934c513c5977a27","platform_signature":{"key_id":"c6afc19b31429869751f06879c75cd64ea92654423d15b44be775bf1310a60da","sig":"N208lrYp4j-gPh9HB3WGS7nXFolCghL5P1JIDBePomWp3R1iLi_wDBUoh8xHV4QB7rt7TWk1n37sr-x5rUXBAQ"},"schema":"pubphys.envelope/1"},"record_hash":"35976e21fdc15be975d926b0575fbd4cb093a1b7152bbe507f6ac331da6cceb7","leaf_index":2872}