Abstract
A simple model is presented which relates bulk Debye temperatures to cohesive energy, atomic mass and atomic radius by means of a Lennard-Jones type of potential. Good agreement is obtained for the various groups of the periodic table. The model can be extended to describe surface Debye temperatures as well. It explains why the perpendicular surface Debye temperatures of fcc (111). (100) and (110) surfaces are virtually equal for a given element. Experimentally determined surface Debye temperatures are lower than predicted, which is explained in terms of surface relaxation and anharmonicity of the surface oscillations.
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