- #1
Nikitin
- 735
- 27
Hi. A very quick question. Why is it impossible for a wave to travel on a linear one-atomic chain if its wavelength equals the lattice constant? I.e. the lattice points vibrate with a wavelength equal to the distance between them? Here's what I mean:
http://www.lcst-cn.org/Solid%20State%20Physics/Ch42.files/image020.gif
http://www.lcst-cn.org/Solid%20State%20Physics/Ch42.html
The dispersion relation says that the "wave" will have zero frequency if the wavelength equals the lattice constant.
I can see why it must be so mathematically, but I can't understand intuitively why this must happen.
http://www.lcst-cn.org/Solid%20State%20Physics/Ch42.files/image020.gif
http://www.lcst-cn.org/Solid%20State%20Physics/Ch42.html
The dispersion relation says that the "wave" will have zero frequency if the wavelength equals the lattice constant.
I can see why it must be so mathematically, but I can't understand intuitively why this must happen.
Last edited by a moderator: