摘要
在77K下和0—60kbar静压范围内测量了GaAs_(1-x)P_x(0.76 ≤x≤1)混晶的喇曼散射谱。得到了这些混晶的类GaP的LO模的压力系数。发现在所研究的x范围内GaAs_(1-x)P_x混晶的类GaP的LO模的压力行为与Gap的LO模基本相同。利用测得的压力系数计算了类GaP的LO模的模式Gruneisen参数。
The Raman scattering spectra of GaAs_(1-x)P_x (0.76≤x≤)mixed crystals have been measured
under hydrostatic pressure ranging from 0 to 70 kbar at 77 K. The pressure coefficients
of GaP-like LO modes of GaAs_(1-x) P_x mixed crystals is obtaind.It is found that the pressure
behaviour of GaP-like LO modes of GaAs_(1-x)P_x mixed crystals is similar to that of LO mode
of GaP crystal. The mode-Gruneisen parameters of GaP-like LO modes of GaAs_(1-x)P_x mixed
crystals have been calculated from the measured pressure coefficients.
基金
国家自然科学基金
关键词
GAASP
混晶
压力
喇曼散射
Raman scattering
Pressure
Mixed crystal
GaAsP
