【摘要】 在77K下和0—60kbar静压范围内测量了GaAs_1-xP_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-xP_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。更多还原

【Abstract】 The Raman scattering spectra of GaAs_1-xP_x （0.76≤x≤）mixed crystals have been measuredunder hydrostatic pressure ranging from 0 to 70 kbar at 77 K. The pressure coefficientsof GaP-like LO modes of GaAs_1-x P_x mixed crystals is obtaind.It is found that the pressurebehaviour of GaP-like LO modes of GaAs_1-xP_x mixed crystals is similar to that of LO modeof GaP crystal. The mode-Gruneisen parameters of GaP-like LO modes of GaAs_1-xP_x mixedcrystals have been calculated from the measured pressure coefficients.更多还原