摘要

Analytical expressions for the size dependence of the Fermi electronic energy of ultrathin metal films on a dielectric substrate have been derived in the model of free electrons and finite-depth asymmetric potential well. The work functions have been calculated for Al films on SiO2 and Al2O3. It has been shown that the presence of a dielectric leads to a shift in the work function, while retaining the general character of the size dependences.

  • 出版日期2015-2