Each atom supplies three displacement coordinates. Translational invariance gives three acoustic branches for either structure, leaving
(1)
These count branches at a general wavevector; a doubly degenerate pair still counts as two modes. The stated atom counts refer to primitive cells, so no additional centring factor is needed.

Ancestors (13)

  1. i
  2. b
  3. 1
  4. 2018
  5. Past exam of the condensed matter physics major option course of the University of Oxford
  6. Condensed matter physics major option course of the University of Oxford
  7. Year 4 of the physics course of the University of Oxford
  8. Physics course of the University of Oxford
  9. Undergraduate course of the University of Oxford
  10. Course of the University of Oxford
  11. University of Oxford
  12. List of universities
  13. Home

View article source

Discussion (0)

New discussion

There are no discussions about this article yet.

Articles by others on the same topic (0)

There are currently no matching articles.
See all articles in the same topic Create my own version