Abstract: | Optically detected magnetic resonance has been used to investigate exciton recombination in the layered semiconductor GaS. Five triplet exciton resonances have been observed all with the same g-value of gex6 = 2.006 ± 0.002 but with different zero field splittings: , . The resonances from the high energy wing are remarkably narrow and we believe that this may be the first observation of resonance from free indirect excitons. |