Topological insulators and one of its creators

This is a talk by Mr. Zhang, on the pogress and history of topological insulators and its relation to other subjects in condensed matter physics.

Below is the link of this talk:

http://www.youtube.com/watch?v=Qg8Yu-Ju3Vw&NR=1

And Below is the link of an conversation with the talker:

http://www.youtube.com/watch?v=d5s6nZtPAHE&feature=related