Abstract
The structural and electronic properties of clean evaporated copper films on (0001) Ru surfaces were studied by low energy electron diffraction, Auger electron spectroscopy and thermal desorption and work function measurements. Two-dimensional epitaxial growth and three-dimensional epitaxial growth are clearly discernible from “extra” spots in the low energy electron diffraction patterns and from Auger spectroscopy as well as from thermal desorption measurements which show the formation of two states β 1 and β 2. The β 2 state is identified as arising from two-dimensional copper growth and is almost saturated after the deposition of about 5 × 10 14 Cu atoms cm -2; the β 1 state is caused by the three-dimensional growth of copper. The binding energies of the two states were evaluated from the maximum desorption temperatures; we found that the binding energy of β 2 exceeds that of β 1 (which is identical with the sublimation energy of copper) by about 3–4 kcal mol -1. The work function increases up to 800 meV; an intermediate maximum indicates a small charge transfer from ruthenium to copper.
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
