513.001 Molecular and Solid State Physics

Return to
problem list

Wolfram Alpha

Physical
Constants

Periodic System
of Elements

      

NaCl

NaCl is an insulator with an fcc Bravais lattice. There are two atoms in the basis.

(a) What does the first Brillouin zone look like?

(b) Draw approximately the phonon dispersion relation for NaCl along L-Γ-X.

(c) Draw approximately the electron dispersion relation for NaCl along L-Γ-X.

$\large \overline{\Gamma L}=\frac{\sqrt{3}\pi}{a}$  $\large \overline{\Gamma X}=\frac{2\pi}{a}$