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However, the underlying mechanisms driving its resistance are unclear, especially for strongly ionising radiation. Here, we use swift heavy ions to show that a strong recrystallisation effect induced by the ions is the key mechanism behind the observed resistance. We use atomistic simulations to examine and predict the damage evolution. These show that the recrystallisation lowers the expected damage levels significantly and has strong implications when studying high fluences for which numerous overlaps occur. Moreover, the simulations reveal structures such as point and extended defects, density gradients and voids with excellent agreement between simulation and experiment. We expect that the developed modelling scheme will contribute to improving the design and test of future radiation-resistant GaN-based devices.<\/jats:p>","DOI":"10.1038\/s42005-021-00550-2","type":"journal-article","created":{"date-parts":[[2021,3,12]],"date-time":"2021-03-12T11:07:02Z","timestamp":1615547222000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":59,"title":["Unravelling the secrets of the resistance of GaN to strongly ionising radiation"],"prefix":"10.1038","volume":"4","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-0389-6143","authenticated-orcid":false,"given":"Miguel C.","family":"Sequeira","sequence":"first","affiliation":[]},{"given":"Jean-Gabriel","family":"Mattei","sequence":"additional","affiliation":[]},{"given":"Henrique","family":"Vazquez","sequence":"additional","affiliation":[]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5828-200X","authenticated-orcid":false,"given":"Flyura","family":"Djurabekova","sequence":"additional","affiliation":[]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6244-1942","authenticated-orcid":false,"given":"Kai","family":"Nordlund","sequence":"additional","affiliation":[]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3821-6670","authenticated-orcid":false,"given":"Isabelle","family":"Monnet","sequence":"additional","affiliation":[]},{"given":"Pablo","family":"Mota-Santiago","sequence":"additional","affiliation":[]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1806-2432","authenticated-orcid":false,"given":"Patrick","family":"Kluth","sequence":"additional","affiliation":[]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4915-1016","authenticated-orcid":false,"given":"Clara","family":"Grygiel","sequence":"additional","affiliation":[]},{"given":"Shuo","family":"Zhang","sequence":"additional","affiliation":[]},{"given":"Eduardo","family":"Alves","sequence":"additional","affiliation":[]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5546-6922","authenticated-orcid":false,"given":"Katharina","family":"Lorenz","sequence":"additional","affiliation":[]}],"member":"297","published-online":{"date-parts":[[2021,3,12]]},"reference":[{"key":"550_CR1","doi-asserted-by":"publisher","first-page":"1764","DOI":"10.1109\/TMTT.2012.2187535","volume":"60","author":"RS Pengelly","year":"2012","unstructured":"Pengelly, R. 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