Structural and electrical properties of epitaxial metal films grown on argon ion bombarded and annealed (001)InP |
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Authors: | R.F.C. Farrow A.G. Cullis A.J. Grant J.E. Pattison |
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Affiliation: | Royal Signals and Radar Establishment, St Andrews Road, Malvern, Worcs WR14 3PS, England |
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Abstract: | A study has been made of intimate metal-InP contacts prepared by metal beam epitaxy in ultra-high vacuum Oxygen and carbon contamination was removed from the (001)InP surface by bombardment with 500 eV Ar+ ions. On annealing to 250°C, In islands appeared on the surface and c(2×8) reconstruction was observed. Gold and silver films were found to grow epitaxially on the InP at ?40°C but the electrical properties indicate greatly reduced Schottky barrier heights and non-ideal current-voltage characteristics which may be attributed to non-stoichiometry and damage at the semiconductor surface resulting from the ion bombardment. |
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