University of Cambridge > Talks.cam > Electronic Structure Discussion Group > Topological phonons in ferroelectrics switched by light

Topological phonons in ferroelectrics switched by light

Add to your list(s) Download to your calendar using vCal

If you have a question about this talk, please contact db729.

Topological states of electrons and photons have been well studied. I will talk about topological phonons and where to find them. Even in well-known materials, such phonon topology can be found everywhere and are protected by certain crystalline symmetry. In ferroelectrics, structural phase transition breaks the inversion symmetry in one direction while preserves mirror symmetry in another, leading to the emergence of Weyl phonons with coexisting nodal line phonons. Such topological phase can be switched on/off by light even without structural phase transition.

This talk is part of the Electronic Structure Discussion Group series.

Tell a friend about this talk:

This talk is included in these lists:

Note that ex-directory lists are not shown.

 

© 2006-2020 Talks.cam, University of Cambridge. Contact Us | Help and Documentation | Privacy and Publicity