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Proceedings Paper

P-H bonds in the reconstruction of P-rich InP(100) measured with FTIR
Author(s): T. Letzig; F. Willig
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Paper Abstract

The reconstruction of P-rich InP(100) requires at least a (2x4) surface unit cell to stay semiconducting and uncharged (electron counting rule). Recently it has been shown that the much smaller (2x2) unit cell obtained from MOCVD (metalorganic vapor deposition) growth contains P-H bonds. Orientation and polarization dependent Fourier Transform Infrared Spectroscopy (FTIR) of the P-H bonds in the Attenuated Total Reflection (ATR) mode have confirmed the specific form of the (2x2) surface unit cell (T. Letzig et al., Phys. Rev. B 71 (2005) 033308) earlier proposed by W.G. Schmidt and coworkers (W.G. Schmidt et al., Phys. Rev. Lett. 90 (2003) 126101). Surface unit cells with a higher concentration of P-H bonds also obey the electron counting rule. A c(2x2) LEED image and two matching FTIR peaks were observed when the (2x2) reconstructed surface was exposed to atomic hydrogen. The corresponding c(2x2)-2P-3H surface unit cell can be shown to form a stable surface phase (T. Letzig et al., Phys. Rev. B, submitted). The complete transformation of the (2x2) surface to this new phase is not observed since the surface deteriorates when exposed to a higher dose of atomic hydrogen.

Paper Details

Date Published: 14 September 2006
PDF: 3 pages
Proc. SPIE 6325, Physical Chemistry of Interfaces and Nanomaterials V, 63250L (14 September 2006); doi: 10.1117/12.683717
Show Author Affiliations
T. Letzig, Hahn-Meitner-Institute (Germany)
F. Willig, Hahn-Meitner-Institute (Germany)

Published in SPIE Proceedings Vol. 6325:
Physical Chemistry of Interfaces and Nanomaterials V
Mark Spitler; Frank Willig, Editor(s)

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