Extreme band bending at MBE-grown InAs(001) surfaces induced by in situ sulphur passivation
UNSPECIFIED (2002) Extreme band bending at MBE-grown InAs(001) surfaces induced by in situ sulphur passivation. In: 13th International Conference on Crystal Growth held in conjunction with the 11th International Conference on Vapor Growth and Epitaxy, KYOTO, JAPAN, JUL 30-AUG 04, 2001. Published in: JOURNAL OF CRYSTAL GROWTH, 237 (Part 1). pp. 196-200.Full text not available from this repository.
The passivation of InAs(001) surfaces by exposure to sulphur in ultra-high vacuum (UHV), followed by capping with amorphous arsenic, has been studied by high resolution electron energy loss spectroscopy (HREELS), X-ray photoelectron spectroscopy (XPS) and low energy electron diffraction (LEED). Samples grown and passivated at NIMS were transferred to Warwick for analysis, through air and without special precautions. Well ordered and clean InAs surfaces were recovered simply by thermal annealing in UHV. A series of reconstructions were investigated using LEED and XPS by increasing the anneal temperature: a disordered S-rich (1 x 1), ordered S-terminated (2 x 1) and finally a S-free (4 x 2)/c((8/2) In-terininated surface. The evolution of the HREEL spectra with annealing was also measured, and observations of the Surface plasmon mode indicated a very strong surface electron accumulation layer. The downward band bending was largest for the S-rich surfaces with the surface Fermi level as high as 600 meV above the conduction band minimum. (C) 2002 Elsevier Science B.V. All rights reserved.
|Item Type:||Conference Item (UNSPECIFIED)|
|Subjects:||Q Science > QD Chemistry|
|Journal or Publication Title:||JOURNAL OF CRYSTAL GROWTH|
|Publisher:||ELSEVIER SCIENCE BV|
|Official Date:||April 2002|
|Number of Pages:||5|
|Page Range:||pp. 196-200|
|Title of Event:||13th International Conference on Crystal Growth held in conjunction with the 11th International Conference on Vapor Growth and Epitaxy|
|Location of Event:||KYOTO, JAPAN|
|Date(s) of Event:||JUL 30-AUG 04, 2001|
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