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

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

doi:10.1088/1367-2630/abbf23

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

Quantum Physics 2021-03-09 v1 Mesoscale and Nanoscale Physics Optics

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

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Abstract

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.

Keywords

color centers silicon carbide spin-orbit coupling spin relaxation spin lifetime transition-metal defects quantum technologies

Cite

@article{arxiv.1912.04612,
  title  = {Spin-relaxation times exceeding seconds for color centers with strong spin-orbit coupling in SiC},
  author = {Carmem M. Gilardoni and Tom Bosma and Danny van Hien and Freddie Hendriks and Björn Magnusson and Alexandre Ellison and Ivan G. Ivanov and N. T. Son and Caspar H. van der Wal},
  journal= {arXiv preprint arXiv:1912.04612},
  year   = {2021}
}

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

Abstract

Keywords

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