|Oct31-12, 02:34 PM||#1|
expanding atomic displacements in terms of all lattice wave modes?
I find the expression:
"In general, one can expand the atomic displacements in terms of all the lattice wave
modes (resembles a Fourier series expansion)"
But I have not found the expression in any other literature. (In fact, some literature, like P.Y. Yu and M. Cardona: Fundamentals of Semiconductors, a long wavelength limitation seems to have been imposed.) Is the above-cited expression correct (in 3D lattice)?
Thank for your assistance.
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|Oct31-12, 04:00 PM||#2|
Yes, that's true. Should be explained in any book on solid state theory.
|Oct31-12, 04:23 PM||#3|
Have you ever done normal mode decomposition of a system of coupled oscillators? This is the same, except that the system is infinite, but periodic boundary conditions are imposed.
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