论文部分内容阅读
利用氨热法合成了AlxGa1 -xN合金的纳米固体 ,其中Al含量的摩尔数可在x =0～ 1的范围内变化 .在x值从 0到 1整个范围内 ,对该合金的纳米固体进行了激光Raman光谱分析 ,证实了A1 (LO)声子的单模式行为和E2 声子的双模式行为 .从实验现象中还可以推断出A1(TO)声子可能具有单模式行为 .Al(LO)声子频率在x =0～ 0 .5范围内迅速单调增加 ,当x >0 .5时则缓慢增加 ,这可能是由于纳米颗粒之间的相互作用造成的 .对于A1 (TO) ,A1 (LO) ,和E2 (GaN)声子模式 ,其线宽在x =0 .5时达到最大值
Nanostructures of AlxGa1-xN alloys were synthesized by ammonothermal method, in which the molar amount of Al content can be varied in the range of x = 0 to 1. For the nanosolid of the alloy in the entire range of x values from 0 to 1 Laser Raman spectroscopy analysis confirmed the single-mode behavior of A1 (LO) phonons and the dual-mode behavior of E2 phonons. It is also deduced from the experimental phenomena that the A1 (TO) phonon may have a single mode behavior. ) The phonon frequency increases rapidly monotonically in the range of x = 0 ~ 0.5 and slowly increases when x> 0.5, which may be due to the interaction between the nanoparticles. For A1 (TO), A1 (LO), and E2 (GaN) phonon modes, with their linewidth reaching a maximum at x = 0.5