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This massive gap inversion arises from a unique synergy between flat honeycomb structure, strong spin orbit coupling, and an orbital filtering effect that is mediated by the substrate. However, the rapid oxidation of bismuthene in air has severely hindered the development of applications, so far confining experiments to ultra\u2010high vacuum conditions. Intercalating bismuthene between SiC and a protective sheet of graphene, this barrier is successfully overcome. As demonstrated by scanning tunneling microscopy and photoemission spectroscopy, graphene intercalation preserves the structural and topological integrity of bismuthene, while effectively shielding it from oxidation in air. Hereby, hydrogen is identified as the critical process gas that was\u00a0missing in previous bismuth intercalation attempts. These findings facilitate ex\u2010situ experiments and pave the way for the development of bismuthene based devices, signaling a significant step forward in the development of next\u2010generation\u00a0technologies.<\/jats:p>","DOI":"10.1002\/adma.202502412","type":"journal-article","created":{"date-parts":[[2025,5,20]],"date-time":"2025-05-20T07:32:13Z","timestamp":1747726333000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":14,"title":["Bismuthene Under Cover: Graphene Intercalation of a Large Gap Quantum Spin Hall Insulator"],"prefix":"10.1002","volume":"37","author":[{"ORCID":"https:\/\/orcid.org\/0009-0008-0165-8441","authenticated-orcid":false,"given":"Lukas","family":"Gehrig","sequence":"first","affiliation":[{"name":"Physikalisches Institut Universit\u00e4t W\u00fcrzburg D\u201097074 W\u00fcrzburg Germany"},{"name":"W\u00fcrzburg\u2010Dresden Cluster of Excellence ct.qmat Universit\u00e4t W\u00fcrzburg D\u201097074 W\u00fcrzburg Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0009-9860-1966","authenticated-orcid":false,"given":"Cedric","family":"Schmitt","sequence":"additional","affiliation":[{"name":"Physikalisches Institut Universit\u00e4t W\u00fcrzburg D\u201097074 W\u00fcrzburg Germany"},{"name":"W\u00fcrzburg\u2010Dresden Cluster of Excellence ct.qmat Universit\u00e4t W\u00fcrzburg D\u201097074 W\u00fcrzburg Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3918-4962","authenticated-orcid":false,"given":"Jonas","family":"Erhardt","sequence":"additional","affiliation":[{"name":"Physikalisches Institut Universit\u00e4t W\u00fcrzburg D\u201097074 W\u00fcrzburg Germany"},{"name":"W\u00fcrzburg\u2010Dresden Cluster of Excellence ct.qmat Universit\u00e4t W\u00fcrzburg D\u201097074 W\u00fcrzburg Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5319-2278","authenticated-orcid":false,"given":"Bing","family":"Liu","sequence":"additional","affiliation":[{"name":"Physikalisches Institut Universit\u00e4t W\u00fcrzburg D\u201097074 W\u00fcrzburg Germany"},{"name":"W\u00fcrzburg\u2010Dresden Cluster of Excellence ct.qmat Universit\u00e4t W\u00fcrzburg D\u201097074 W\u00fcrzburg Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0924-3864","authenticated-orcid":false,"given":"Tim","family":"Wagner","sequence":"additional","affiliation":[{"name":"Physikalisches Institut Universit\u00e4t W\u00fcrzburg D\u201097074 W\u00fcrzburg Germany"},{"name":"W\u00fcrzburg\u2010Dresden Cluster of Excellence ct.qmat Universit\u00e4t W\u00fcrzburg D\u201097074 W\u00fcrzburg Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7219-2297","authenticated-orcid":false,"given":"Martin","family":"Kamp","sequence":"additional","affiliation":[{"name":"Physikalisches Institut Universit\u00e4t W\u00fcrzburg D\u201097074 W\u00fcrzburg Germany"},{"name":"Physikalisches Institut and R\u00f6ntgen Center for Complex Material Systems D\u201097074 W\u00fcrzburg Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0042-2214","authenticated-orcid":false,"given":"Simon","family":"Moser","sequence":"additional","affiliation":[{"name":"Physikalisches Institut Universit\u00e4t W\u00fcrzburg D\u201097074 W\u00fcrzburg Germany"},{"name":"W\u00fcrzburg\u2010Dresden Cluster of Excellence ct.qmat Universit\u00e4t W\u00fcrzburg D\u201097074 W\u00fcrzburg Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3682-6325","authenticated-orcid":false,"given":"Ralph","family":"Claessen","sequence":"additional","affiliation":[{"name":"Physikalisches Institut Universit\u00e4t W\u00fcrzburg D\u201097074 W\u00fcrzburg Germany"},{"name":"W\u00fcrzburg\u2010Dresden Cluster of Excellence ct.qmat Universit\u00e4t W\u00fcrzburg D\u201097074 W\u00fcrzburg Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2025,5,20]]},"reference":[{"key":"e_1_2_10_1_1","doi-asserted-by":"publisher","DOI":"10.1103\/PhysRevLett.95.226801"},{"key":"e_1_2_10_2_1","doi-asserted-by":"publisher","DOI":"10.1126\/science.1148047"},{"key":"e_1_2_10_3_1","doi-asserted-by":"publisher","DOI":"10.1103\/PhysRevLett.96.106802"},{"key":"e_1_2_10_4_1","doi-asserted-by":"publisher","DOI":"10.1063\/1.4792275"},{"key":"e_1_2_10_5_1","doi-asserted-by":"publisher","DOI":"10.1126\/science.1256815"},{"key":"e_1_2_10_6_1","doi-asserted-by":"publisher","DOI":"10.1038\/nmat3828"},{"key":"e_1_2_10_7_1","doi-asserted-by":"publisher","DOI":"10.1038\/s41535-018-0100-9"},{"key":"e_1_2_10_8_1","volume":"6","author":"Aasen D.","year":"2016","journal-title":"Phys. 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