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ADSORPTION KINETICS OF POTASSIUM ON SrTiO₃(100)

E. E. MORI

Department of Physics, University of Ioannina, 451 10 Ioannina, Greece

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and

M. KAMARATOS

Department of Physics, University of Ioannina, 451 10 Ioannina, Greece

Corresponding author.

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https://doi.org/10.1142/S0218625X06008657Cited by:5 (Source: Crossref)

Abstract

In this paper, we study the kinetics of potassium adsorption on SrTiO₃(100) surface at room temperature. The study took place in UHV using AES, EELS, LEED, TPD, and WF measurements. Potassium grows in two-dimensional islands with maximum coverage of 3.9 × 10¹⁴ at/cm². During adsorption charge transfer from the K-4s to Ti-3d energy level has been observed. No K–O compound has been measured. After heating at 1050 K most of the adsorbed potassium desorbs and the SrTiO₃(100) (1 × 1) LEED pattern reappears. There is not any indication of potassium intercalation into the substrate, either at room or at elevated temperature.

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