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Quantum. Technol."],"published-print":{"date-parts":[[2024,6,1]]},"abstract":"<jats:title>Abstract<\/jats:title>\n               <jats:p>In order to study the structural formation yield of germanium-vacancy (GeV) centers from implanted Ge in diamond, we have investigated its lattice location by using the <jats:italic>\u03b2<\/jats:italic>\n                  <jats:sup>\u2212<\/jats:sup> emission channeling technique from the radioactive isotope <jats:sup>75<\/jats:sup>Ge (<jats:italic>t<\/jats:italic>\n                  <jats:sub>1\/2<\/jats:sub> = 83 min) produced at the ISOLDE\/CERN facility. <jats:sup>75<\/jats:sup>Ge was introduced via recoil implantation following 30 keV ion implantation of the precursor isotope <jats:sup>75<\/jats:sup>Ga (126 s) with fluences around 2 \u00d7 10<jats:sup>12<\/jats:sup>\u20135 \u00d7 10<jats:sup>13<\/jats:sup> cm<jats:sup>\u22122<\/jats:sup>. While for room temperature implantation fractions around 20% were observed in split-vacancy configuration and 45% substitutional Ge, following implantation or annealing up to 900 \u00b0C, the split-vacancy fraction dropped to 6%\u20139% and the substitutional fraction reached 85%\u201396%. GeV complexes thus show a lower structural formation yield than other impurities, with substitutional Ge being the dominant configuration. Moreover, annealing or high-temperature implantation seem to favor the formation of substitutional Ge over GeV. Our results strongly suggest that GeV complexes are thermally unstable and transformed to substitutional Ge by capture of mobile carbon interstitials, which is likely to contribute to the difficulties in achieving high formation yields of these optically active centers.<\/jats:p>","DOI":"10.1088\/2633-4356\/ad4b8d","type":"journal-article","created":{"date-parts":[[2024,5,14]],"date-time":"2024-05-14T22:46:06Z","timestamp":1715726766000},"page":"025101","update-policy":"https:\/\/doi.org\/10.1088\/crossmark-policy","source":"Crossref","is-referenced-by-count":5,"title":["Structural formation yield of GeV centers from implanted Ge in diamond"],"prefix":"10.1088","volume":"4","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-7398-2904","authenticated-orcid":true,"given":"Ulrich","family":"Wahl","sequence":"first","affiliation":[]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8848-0824","authenticated-orcid":false,"given":"Jo\u00e3o Guilherme","family":"Correia","sequence":"additional","affiliation":[]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9318-2418","authenticated-orcid":false,"given":"\u00c2ngelo","family":"Costa","sequence":"additional","affiliation":[]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1668-6399","authenticated-orcid":true,"given":"Afonso","family":"Lamelas","sequence":"additional","affiliation":[]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3359-7133","authenticated-orcid":false,"given":"V\u00edtor","family":"Amaral","sequence":"additional","affiliation":[]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0513-6869","authenticated-orcid":false,"given":"Karl","family":"Johnston","sequence":"additional","affiliation":[]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3186-4883","authenticated-orcid":true,"given":"Goele","family":"Magchiels","sequence":"additional","affiliation":[]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7423-9661","authenticated-orcid":false,"given":"Shandirai Malven","family":"Tunhuma","sequence":"additional","affiliation":[]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9158-6534","authenticated-orcid":false,"given":"Andr\u00e9","family":"Vantomme","sequence":"additional","affiliation":[]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1426-9102","authenticated-orcid":true,"given":"Lino M C","family":"Pereira","sequence":"additional","affiliation":[]}],"member":"266","published-online":{"date-parts":[[2024,5,29]]},"reference":[{"key":"mqtad4b8dbib1","doi-asserted-by":"publisher","first-page":"5625","DOI":"10.1038\/s41467-019-13332-w","article-title":"Quantum nanophotonics with group IV defects in diamond","volume":"10","author":"Bradac","year":"2019","journal-title":"Nat. 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