Optical anisotropies of InP(001) surfaces
作者:
C. Goletti,
N. Esser,
U. Resch-Esser,
V. Wagner,
J. Foeller,
M. Pristovsek,
W. Richter,
期刊:
Journal of Applied Physics
(AIP Available online 1997)
卷期:
Volume 81,
issue 8
页码: 3611-3615
ISSN:0021-8979
年代: 1997
DOI:10.1063/1.365478
出版商: AIP
数据来源: AIP
摘要:
Metalorganic vapor phase epitaxy grown InP samples capped with a protective As/P double layer were used to study clean (001) surfaces in ultrahigh vacuum. By the thermal desorption of As and P cap layers, InP surfaces producing sharp 2×4 low energy electron diffraction (LEED) patterns were prepared. The reconstructed surface and intermediate preparation stages were studied by using reflectance anisotropy spectroscopy (RAS), LEED, and Auger electron spectroscopy. Features in the optical anisotropy related to the contribution of P–P and In–In surface bonds are identified and discussed. The results show that the surface-related optical anisotropy of the 2×4 In-rich reconstruction of InP(001) is due to In–In bonds along the [110] direction that produce a large optical anisotropy below 2 eV. Furthermore, at intermediate annealing stages, information by RAS on a P-rich 1×1 reconstructed phase was obtained. The contribution of P dimers to surface reflectance anisotropy above 3 eV is discussed. ©1997 American Institute of Physics.
点击下载:
PDF
(95KB)
返 回