TRANSPORT ANISOTROPY IN SPONTANEOUSLY ORDERED GAINP2 ALLOYS

Large anisotropy in minority carrier diffusion length and specific con ductivity is observed in epitaxial layers of GaInP2 alloys with CuPtB- type ordering. Both the diffusion length and specific conductivity are enhanced, by factor of 10, in the [110] direction, parallel to the Li ne of intersection of the ordered (1-11) and (-111) planes with the (0 01) growth surface. The reduction in transport length in the [1-10] di rection is attributed to carrier scattering at domain boundaries. No t ransport anisotropy is observed in disordered GaInP2 epitaxial layers. (C) 1997 American Institute of Physics.