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Realization of QSHI with gapped helical edge states, which would enable deterministic on\/off switching of the edge\u2010channel conductance is a key requirement for programmable topological circuits. Here, we report realization of superlattice\u2010modulated QSHI HfTe\n                    <jats:sub>5<\/jats:sub>\n                    hosting emergent multigap\u2010like helical edge states. Using scanning tunneling microscopy and spectroscopy, we identify a reconstruction\u2010induced periodic superlattice modulation in epitaxial monolayer HfTe\n                    <jats:sub>5<\/jats:sub>\n                    and directly observe multiple gap\u2010like features in the edge channel, accompanied by a series of sharp peaks in the density of states. Combined with theoretical modelling, we attribute the observed edge gap to the finite\u2010width coupling between the two edges significantly enhanced by the superlattice modulation, whereas the sharp peaks are the manifestations of mini\u2010gaps opening at the reduced Brillouin zone boundaries by the periodic modulation of spin\u2010orbit coupling. Notably, these sharp peaks exhibit clear Zeeman splitting under magnetic fields, consistent with the helical nature of the topological edge states. Our results establish a viable route to engineering gapped helical edge states in QSHI and provide a promising platform for topological devices with desired on\/off switchability.\n                  <\/jats:p>","DOI":"10.1002\/adma.75159","type":"journal-article","created":{"date-parts":[[2026,9,30]],"date-time":"2026-09-30T12:57:17Z","timestamp":1790773037000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Realization of Quantum Spin Hall Insulator Superlattice with Emergent Multigap\u2010Like Helical Edge States"],"prefix":"10.1002","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-2088-0522","authenticated-orcid":false,"given":"Hui","family":"Guo","sequence":"first","affiliation":[{"name":"Beijing National Center For Condensed Matter Physics and Institute of Physics Chinese Academy of Sciences  Beijing P. R. China"},{"name":"School of Physical Sciences University of Chinese Academy of Sciences  Beijing P. R. 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China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6366-4731","authenticated-orcid":false,"given":"Hengxin","family":"Tan","sequence":"additional","affiliation":[{"name":"School of Physics and Astronomy Shanghai Jiao Tong University  Shanghai P. R. China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Chen","family":"Liu","sequence":"additional","affiliation":[{"name":"Institute of High Energy Physics Chinese Academy of Sciences  Beijing P. R. China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Zihao","family":"Huang","sequence":"additional","affiliation":[{"name":"Beijing National Center For Condensed Matter Physics and Institute of Physics Chinese Academy of Sciences  Beijing P. R. China"},{"name":"School of Physical Sciences University of Chinese Academy of Sciences  Beijing P. R. 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China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Rui","family":"Chen","sequence":"additional","affiliation":[{"name":"Department of Physics Hubei University  Wuhan Hubei P. R. China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4304-9835","authenticated-orcid":false,"given":"Haitao","family":"Yang","sequence":"additional","affiliation":[{"name":"Beijing National Center For Condensed Matter Physics and Institute of Physics Chinese Academy of Sciences  Beijing P. R. China"},{"name":"School of Physical Sciences University of Chinese Academy of Sciences  Beijing P. R. China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Wang","family":"Yao","sequence":"additional","affiliation":[{"name":"New Cornerstone Science Laboratory Department of Physics The University of Hong Kong  Hong Kong P. R. 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