THE NEAR-NEIGHBOR ATOMIC ARRANGEMENT IN GAASXP1-X SOLID-SOLUTION

Extended X-ray absorption fine structure (EXAFS) technique is employed to probe the local atomic structure of III-V pseudobinary solid solut ion GaAsXP1-X, with the composition from X = 0 to X = 1. The first and second near neighbor bond lengths and bond angles are obtained and th e results imply distortion of the near neighbor atomic structure. The atomic scale structure based on a random distribution of anions can be described by using five special coordination tetrahedra, the applicat ion on GaAsXP1-X is proved to be excellent agreement with the EXAFS re sults.