Bulklike behavior of the optical anisotropy of cation-rich (001) surfaces of Ga 1-x In x As alloys

作者: V. L. Berkovits , D. Paget , A. V. Subashiev , O. E. Tereshchenko

DOI: 10.1103/PHYSREVB.69.033305

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摘要: Using reflectance anisotropy spectroscopy, we have studied cation-rich (001) surfaces of Ga 1 - x In As. All the spectra contain a dominant negative line, for which energy shifts between 1.8 eV InAs and 2.3 forGaAs. The dependence this on concentration is nonlinear perfectly interpreted using bowing parameter characteristic bulk transitions. present results, amplitude shift, fact that transition lies far away from critical points, propose final state optical penetrates deeply into bulk, whereas initial keeps more pronounced surface character.

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