Abstract：
:Diamond attracts considerable attention as a versatile and technologically useful material. For many demanding applications, such as recently emerged quantum optics and sensing, it is important to develop new routes for fabrication of diamond containing defects with specific optical, electronic and magnetic properties. Here we report on successful synthesis of diamond from a germanium-carbon system at conditions of 7 GPa and 1,500-1,800 °C. Both spontaneously nucleated diamond crystals and diamond growth layers on seeds were produced in experiments with reaction time up to 60 h. We found that diamonds synthesized in the Ge-C system contain a new optical centre with a ZPL system at 2.059 eV, which is assigned to germanium impurities. Photoluminescence from this centre is dominated by zero-phonon optical transitions even at room temperature. Our results have widened the family of non-metallic elemental catalysts for diamond synthesis and demonstrated the creation of germanium-related optical centres in diamond.
journal_name
Sci Repjournal_title
Scientific reportsauthors
Palyanov YN,Kupriyanov IN,Borzdov YM,Surovtsev NVdoi
10.1038/srep14789subject
Has Abstractpub_date
2015-10-05 00:00:00pages
14789issn
2045-2322pii
srep14789journal_volume
5pub_type
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