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Atomic Surface Structure of MOVPE-Grown InP(001)

โœ Scribed by P. Vogt; A. M. Frisch; Th. Hannappel; S. Visbeck; F. Willig; Ch. Jung; N. Esser; W. Braun; W. Richter

Publisher
John Wiley and Sons
Year
1999
Tongue
English
Weight
238 KB
Volume
215
Category
Article
ISSN
0370-1972

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โœฆ Synopsis

In this study soft X-ray photoemission spectroscopy (SXPS) and scanning tunneling microscopy (STM) were used to investigate the microscopic structure of the P-rich so-called (2ร‚1) reconstruction of InP(001). The samples were homoepitaxially grown in a commercial MOVPE reactor, transferred to ultra high vacuum (UHV), and then transported to separate UHV analysis chambers. Electron diffraction patterns of the samples taken after transfer show a (2ร‚1)/(2ร‚2) periodicity with streaks in the [ " 110] direction. STM images display rows along the [110] direction showing a twofold periodicity. Consistent with SXPS spectra of the P2p and In4d core levels the structure can be explained by a fractional monolayer of P-dimers adsorbed on a complete second layer of P. The P-dimers are arranged in local (2ร‚2)/c(2ร‚2)/c(4ร‚2) structures showing a lack of long-range ordering.

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