Adsorption of tellurium on Ni(100)

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Abstract
Four different ordered structures have been observed with the adsorption of Te on Ni(100). The only ordered structure formed at room temperature was the c (2×2) at which the work function went through a minimum as a function of coverage. A well−ordered c (2×4) structure was formed by heating to 900°C when the coverage was 1/4 monolayer or greater. This structure has not been observed with the other chalcogens on Ni(100) for which the p (2×2) structure is observed at 1/4−monolayer coverage. Heating of the sample when it was covered with 1/2 monolayer or more of Te to a critical temperature near 550°C produced a completely faceted surface which was stable at temperatures up to 700°C. An ordered multilayer structure was formed by heating the sample when it was covered with several layers of Te to temperatures in the range from 200 to 500°C.

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