Anomalies in the NMR of silicon: Unexpected spin echoes in a dilute dipolar solid
Anomalies in the NMR of silicon: Unexpected spin echoes in a dilute dipolar solid
NMR spin echo measurements of ${}^{29}\mathrm{Si}$ in silicon powders have uncovered a variety of surprising phenomena that appear to be independent of doping. These surprises include long tails and even-odd asymmetry in Carr-Purcell-Meiboom-Gill (CPMG) echo trains, and anomalous stimulated echoes with several peculiar characteristics. Given the simplicity of this spin …