Dynamical suppression of nuclear-spin decoherence time in Si and GaAs using inversion pulses

Abstract We found that nuclear-spin decoherence is suppressed by applying inversion pulses such as alternating phase Carr–Purcell (APCP) and Carr–Purcell–Meiboom–Gill (CPMG) sequences in silicon and GaAs. The decoherence time reaches ∼ 1.3 s by applying inversion pulses, which is ∼ 200 times as long as the characteristic decay time obtained from the Hahn echo sequence ( ∼ 6 ms ) in silicon.