Fine structure of NQR spectra in GaSe

Abstract

Peculiarities of the observation of nuclear quadrupole resonance (NQR) in GaSe crystals grown from melt are under investigations. The splitting of a resonance NQR line by two identical spectra is caused by the availability of non-equivalent positions of Ga atoms in the polytypes e, y and, probably, o. The appearance of a fine structure in NQR spectra is related to ordering in the system of the lattice defects (polytypes), when the atomic Se-Ga-Ga-Se layers are stacked during the crystal growth.