I find the expression:(adsbygoogle = window.adsbygoogle || []).push({});

"In general, one can expand the atomic displacements in terms of all the lattice wave

modes (resembles a Fourier series expansion)"

at:

https://courses.cit.cornell.edu/ece407/Lectures/handout17.pdf

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.

**Physics Forums - The Fusion of Science and Community**

Dismiss Notice

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Expanding atomic displacements in terms of all lattice wave modes?

Loading...

Similar Threads - Expanding atomic displacements | Date |
---|---|

I Width of one electron shell of a hydrogen atom | Feb 24, 2018 |

I Examples of atoms that have more than 8 electrons in shell | Jan 9, 2018 |

Non-Joulian Magnets: Why Do They Expand? | May 22, 2015 |

Expanding the Hamiltonian around a point of symmetry | Feb 27, 2015 |

Expanding the periodic potentials | Apr 24, 2013 |

**Physics Forums - The Fusion of Science and Community**