{"record":{"author":{"account_ref":null,"orcid":null},"builds_on":[],"content_schema":"pubphys.content.revision/1","content_sha256":"fc07a61c6cc17a0348f5e59f5f1863299d57c9b5fbe044ee67ba4b3ab049ee32","created":"2026-10-15T23:43:22Z","files":[],"origin":{"assisted_by":[],"kind":"seed"},"parents":["ae6d90ec488ed4367b3c5eab698ac808a191846ee10837d7d065323d1a4bc208","ce59fb6cd812fc05906d0c60a71c75ea22bc686bcf38e7c3ef7010834d98ee7b"],"salt":"2d3263fc6f132fd19ae9fa264faf56008c7e305622f277c7ca81792b4aef4240","schema":"pubphys.record/2","site":"pubphys.com","target":null,"type":"revision"},"content":{"answer_type":"classification","assisted_by":[],"external_id":"cm.moire-tmd-hubbard.wigner-crystal-melting","kind":"well-posed","literature_status":"open","n":"2","parents":[],"plain":"At fractional fillings such as one electron per three moire sites, electrons in $\\mathrm{WSe_2}$/$\\mathrm{WS_2}$ order into crystals because of their repulsion (generalized Wigner crystals), and how these crystals turn into metals as the repulsion is weakened is unknown.","posed_since":"2020","precise":"In $\\mathrm{WSe_2}$/$\\mathrm{WS_2}$ and similar heterobilayers, insulating states at fractional fillings $\\nu = 1/3, 1/2, 2/3$ and others were detected optically (Regan et al., Nature, 2020, arXiv:1910.09047) and later imaged. As the ratio of Coulomb energy to bandwidth, or the screening length set by gate distance, is reduced, determine whether each crystal melts into a Fermi liquid directly (first or second order) or through intermediate phases such as stripes, bubbles, microemulsions or a quantum-melted state without charge order but with insulating transport. An answer is a phase diagram versus $\\nu$ and screening length with the order of each transition.","problem_ref":"ae6d90ec488ed4367b3c5eab698ac808a191846ee10837d7d065323d1a4bc208","references":"","settled_by":"Local imaging of charge order versus gate distance and density, with compressibility measurements locating each transition and its hysteresis.","status_note":"","title":"Quantum melting of generalized Wigner crystals in moire semiconductors","topic_ref":null},"attested":{"attestation":{"batch":null,"client_id":null,"id_token_sha256":null,"kind":"platform"},"record_hash":"64c9e1f64768c6a0a610afe206ccb2b7ea4c2b42908f9e3c5d46e029dabe79c8","schema":"pubphys.attested/1"},"envelope":{"attested_hash":"b3795277bec00733229d130579cbdfb32355fb8653720319b6d3f61fc73f52a3","platform_signature":{"key_id":"c6afc19b31429869751f06879c75cd64ea92654423d15b44be775bf1310a60da","sig":"FrlDFI23fjbVWq5mBc-XpdziUm8u7bXtO8Na0Wk3oOUDYR9nn5IBTAqIqggn4NPMIA8l1H-yVr7gv0dUdR72Dg"},"schema":"pubphys.envelope/1"},"record_hash":"64c9e1f64768c6a0a610afe206ccb2b7ea4c2b42908f9e3c5d46e029dabe79c8","leaf_index":2956}