Key points are not available for this paper at this time.
A novel quaternary selenide (Na0. 60Ba0. 70) Ga2Se4 (1) obtained by a high-temperature method crystallizes in the non-centrosymmetric space group I4cm, and its structure features GaSe2−∞ chains. It exhibits phase-matchable second-harmonic generation responses with the largest intensity of 0. 3 times that of AgGaS2, and its powder sample has a laser-induced damage threshold of ∼2. 4 times that of AgGaS2. Discussion about its relationship with other highly related structures are addressed as well. Theoretical calculations are performed to analyze its electronic structure and optical properties.
Li et al. (Tue,) studied this question.