Measuring electron spin flip-flops through nuclear spin echo decays

Evan S. Petersen, Alexei M. Tyryshkin, Kohei M. Itoh +6

We use the nuclear spin coherence of ${}^{31}$P donors in ${}^{28}$Si to determine flip-flop rates of donor electron spins. Isotopically purified ${}^{28}$Si crystals minimize the number…