Ga_(1-x)Al_xAs光学声子形变研究(英文)

Abstract

【英文摘要】 The optical-phonon deformation potentials of Ga1-xAlxAs for some of com-positions x have been calculated by the LMTO-ASA virtual crystal appro- ximation(VCA) method with a frozen-phonon model. It is shown that the dependence of the optical-phonon deformation potentials on composition x for Г and L points can be expressed by d = a + bx+cx2. The results obtained from a fitting procedure are given by (in eV).Do =30.95-1.6829x-0.2006x2,D30 = 38.90-2.0430x-0.9659x2,D10 (val) =-13.36-4.4568x-1.0088x2,D10(cond) = ...