Empty lattice approximation: Difference between revisions

Revision as of 01:06, 10 November 2014

Revision as of 09:25, 8 May 2015

Line 1:

{{Electronic structure methodsmethod. This may also include the Density Functional Methods.}}

The '''empty lattice approximation''' is a theoretical [[electronic band structure]] model in which the potential is ''periodic'' and ''weak'' (close to constant). One may also consider an empty{{clarify|is there actually some lattice that is "empty"?|date=November 2014}} irregular lattice, in which the potential is not even periodic.<ref>Physics Lecture Notes. P.Dirac, Feynman,R.,1968. Internet, Amazon,25.03.2014.</ref> The empty lattice approximation describes a number of properties of energy dispersion relations of non-interacting [[Free electron model|free electrons]] that move through a [[crystal structure|crystal lattice]]. The energy of the electrons in the "empty lattice" is the same as the energy of free electrons. The model is useful because it clearly illustrates a number of the sometimes very complex features of energy dispersion relations in solids which are fundamental to all electronic band structures.

__TOC__