We prove, by realistic microscopic calculations within the sp(3)s(*) tight-binding method for GaAs(110) and GaAs(100), that the surface optical properties are not influenced by long-range crystal termination effects, and hence that they can be consistently studied considering slabs of limited thickness (20-30 Angstrom). The origin of derivative like and bulklike line shapes in reflection anisotropy spectra is also discussed, analyzing the effects arising from possible surface-induced reduction, broadening, and shifting of the bulk spectrum near the surface. [S0163-1829(99)01123-61].
Surface versus crystal-termination effects in the optical properties of surfaces / R. Del Sole, G. Onida. - In: PHYSICAL REVIEW. B, CONDENSED MATTER AND MATERIALS PHYSICS. - ISSN 1098-0121. - 60:8(1999), pp. 5523-5528.
Surface versus crystal-termination effects in the optical properties of surfaces
G. OnidaUltimo
1999
Abstract
We prove, by realistic microscopic calculations within the sp(3)s(*) tight-binding method for GaAs(110) and GaAs(100), that the surface optical properties are not influenced by long-range crystal termination effects, and hence that they can be consistently studied considering slabs of limited thickness (20-30 Angstrom). The origin of derivative like and bulklike line shapes in reflection anisotropy spectra is also discussed, analyzing the effects arising from possible surface-induced reduction, broadening, and shifting of the bulk spectrum near the surface. [S0163-1829(99)01123-61].Pubblicazioni consigliate
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