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Adv."],"published-print":{"date-parts":[[2026,8,7]]},"abstract":"<jats:p>\n                    Correlated and topological phases often coexist or compete in van der Waals materials, yet achieving an electrically switchable and reversible conversion between them remains a substantial challenge. Such control is crucial for understanding their interplay and enabling nonvolatile, low-power topological electronics. Here, we propose and demonstrate a polarization-controlled route to switch between Mott insulator and topological metal in ferroelectric-Mott heterostructures. In \u03b1-In\n                    <jats:sub>2<\/jats:sub>\n                    Se\n                    <jats:sub>3<\/jats:sub>\n                    \/1T-NbSe\n                    <jats:sub>2<\/jats:sub>\n                    , polarization reversal modulates interlayer coupling through out-of-plane orbital alignment. Downward polarization stabilizes Mott-insulating states with type-I band alignment, whereas upward polarization enhances interfacial hybridization, forms interlayer covalent-like quasi-bonding, and drives \u0393-point band inversions. The resulting spin-split hybridized valleys penetrate the valence band, inducing a nontrivial topological state with intrinsic anomalous Hall conductivity of \u223c10\n                    <jats:sup>2<\/jats:sup>\n                    \u00a0siemens per centimeter. The comparison with \u03b1-In\n                    <jats:sub>2<\/jats:sub>\n                    Se\n                    <jats:sub>3<\/jats:sub>\n                    \/1T-TaSe\n                    <jats:sub>2<\/jats:sub>\n                    and \u03b1-In\n                    <jats:sub>2<\/jats:sub>\n                    Se\n                    <jats:sub>3<\/jats:sub>\n                    \/1T-TaS\n                    <jats:sub>2<\/jats:sub>\n                    further identifies \u0393-centered valleys and out-of-plane\n                    <jats:inline-formula>\n                      <mml:math xmlns:mml=\"http:\/\/www.w3.org\/1998\/Math\/MathML\" display=\"inline\" overflow=\"scroll\">\n                        <mml:msub>\n                          <mml:mi mathvariant=\"normal\">p<\/mml:mi>\n                          <mml:mi>z<\/mml:mi>\n                        <\/mml:msub>\n                      <\/mml:math>\n                    <\/jats:inline-formula>\n                    -orbital coupling as key ingredients for polarization-switchable topology, providing a general design framework for electrically programmable correlated-topological integration in two-dimensional heterostructures.\n                  <\/jats:p>","DOI":"10.1126\/sciadv.aed6236","type":"journal-article","created":{"date-parts":[[2026,8,7]],"date-time":"2026-08-07T17:59:18Z","timestamp":1786125558000},"update-policy":"https:\/\/doi.org\/10.34133\/aaas_crossmark","source":"Crossref","is-referenced-by-count":0,"title":["Ferroelectric control of the Mott insulator\u2013topological metal transition"],"prefix":"10.1126","volume":"12","author":[{"ORCID":"https:\/\/orcid.org\/0009-0007-1053-1664","authenticated-orcid":true,"given":"Mengmeng","family":"Niu","sequence":"first","affiliation":[{"name":"School of Integrated Circuits and Electronics, School of Multidisciplinary Science, and School of Physics, Beijing Institute of Technology, Beijing 100081, China."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2705-612X","authenticated-orcid":true,"given":"Peng-Jie","family":"Guo","sequence":"additional","affiliation":[{"name":"Beijing Key Laboratory of Optoelectronic Functional Materials and Micro-Nano Devices, School of Physics, Renmin University of China, Beijing 100872, China."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yicheng","family":"Ma","sequence":"additional","affiliation":[{"name":"School of Integrated Circuits and Electronics, School of Multidisciplinary Science, and School of Physics, Beijing Institute of Technology, Beijing 100081, China."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0005-0190-8568","authenticated-orcid":true,"given":"Weikang","family":"Zhou","sequence":"additional","affiliation":[{"name":"School of Integrated Circuits and Electronics, School of Multidisciplinary Science, and School of Physics, 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