The four mode behavior and modes below 180cm -1 related with the interaction between the third nearest atoms in Ga x In 1- x As y Sb 1- y quaternary mixed crystals were observed from the Raman data, and the related phenomenon possibly arising from the multi phonon absorption process was ob.

Quaternary mixed crystal semiconductor material has two independent components of variable,compared with the binary and ternary alloys,its lattice constant , band gap and other physical properties can be individually tuned by changing the composition.

Surface phonon-polaritons in slabs of polar ternary mixed crystals are investigated with the modified random-element-isodisplacement model and the Born-Huang approximation,based on Maxwell’s equations with the usual boundary conditions.

The surface and interface phonon-polaritons in bilayer systems consisting of polar ternary mixed crystals are investigated in the modified random-element-isodisplacement model and the Born-Huang approximation,based on the Maxwell s equations with the boundary conditions.

Cyclotron mass of polaron in ternary mixed crystal A_xB_(1-x)C;

The binding energy of an exciton in the ternary mixed crystals is calculated including the effect of phonons with the Haken′s potential.

The magnetopolarons in ternary mixed crystals A x B 1-x C of polar crystals are studied by an intermediate coupling method in the modified random element isodisplacement (MREI) model and an effective phonon mode approximation (EPMA) are suggested.

Synthesis and characterization of a new liquid crystalline tetramer;

The crystallization behaviour of Al-La-Y-Ni quarternary amorphous alloys,prepared by single-roller melt spinning technique under vaccum, was studied by DSC thermalanalysis, X-ray diffraction and TEM.