@article{oai:repo.qst.go.jp:00048710,
 author = {Simin, D. and Kraus, H. and Sperlich, A. and 大島, 武 and V., Astakhov G. and Dyakonov, V. and 大島 武},
 issue = {16},
 journal = {Phys. Rev. B},
 month = {Apr},
 note = {It is demonstrated that Silicon carbide (SiC) with a natural isotope abundance can preserve a coherent spin superposition in silicon vacancies over an unexpectedly long time exceeding 20 ms. The spin-locked subspace with a drastically reduced decoherence rate is attained through the suppression of heteronuclear spin crosstalking by applying a moderate magnetic field in combination with dynamic decoupling from the nuclear spin baths. Furthermore, Several phonon-assisted mechanisms of spin-lattice relaxation is identidied, and it is found that it can be extremely long at cryogenic temperatures, equal to or even longer than 10 s.},
 pages = {161201-1--161201-5},
 title = {Locking of electron spin coherence above 20 ms in natural silicon carbide},
 volume = {95},
 year = {2017}
}