What does a horizontal band in the Phonon band structure mean?
Posted: Fri Apr 19, 2024 11:21 am
if i have a horzental straight band in phonon despersion what does that means? whats physics behind that band?
Dear asgharali_jan,
since this post is not directly related to the usage of VASP, I moved it to the "From users for users" section of the forum.
Flat bands can signify interesting physics. I want to give the discussions by the users a jump start by linking two papers:
Phys. stat. sol. (c) 1, No. 11, 3043–3046 (2004) discusses the construction of flat phonon bands in a 2D lattice by tuning the force constant matrix.
Science 369, 1343-1347 (2020) discusses ferroelectricity in HfO2 induced by flat phonon bands.
Cheers, Michael
thanks a lot for information