Spin-relaxation times exceeding seconds for color centers with strong spin-orbit coupling in SiC

Carmem Maia Gilardoni*, Tom Bosma, Danny van Hien, Freddie Hendriks, Björn Magnusson, Alexandre Ellison, Ivan G. Ivanov, N. T. Son, Caspar H. van der Wal

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

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Spin-active color centers in solids show good performance for quantum technologies. Several transition-metal defects in SiC offer compatibility with telecom and semiconductor industries. However, whether their strong spin-orbit coupling degrades their spin lifetimes is not clear. We show that a combination of a crystal-field with axial symmetry and spin-orbit coupling leads to a suppression of spin-lattice and spin-spin interactions, resulting in remarkably slow spin relaxation. Our optical measurements on an ensemble of Mo impurities in SiC show a spin lifetime $T_1$ of $2,4$ s at $2$ K.
Original languageEnglish
Article number103051
JournalNew Journal of Physics
Issue number10
Publication statusPublished - Oct-2020


  • quant-ph
  • cond-mat.mes-hall
  • physics.optics

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