Your blogger today: Andy Schofield
OK well due to a blogging malfunction - this blog is starting half-way through the talk - no it seems to be the end of the talk!
Max has defined two types of Topological Insulators: weak or strong. A large N analysis has been done.
Ce-based Kondo Insulators expected to be weak and unstable to disorder.
Mixed valence systems are most likely to be the ones where strong TI insulators would be observed. Hybridization with the conduction electrons can create an infinite spin-orbit coupling.
These are adiabatilcally connected to topological band insulators: small bandwidth and infinite spin-orbit.
Question: Could a Hopf term be useful? Possibly.
Question: Why are all topological insulators cubic and does this impact your discussion? Not sure and the questioner does not know either.
Question: Your analysis looks like 2D - aren't the supposed to be 3D creating surface states? Sure - layers will create it.
Question: Why called Dirac point? Answer: the dispersion looks like a Dirac cone.
Question: Why do we need the notion of entanglement entropy? It provides a way of distinguishing between charge density wavesand topological insulators.
Question: Can all of this physics be deduced from the Green function? No you might need a 4 particle correlation.
Question: Why do you get band narrowing from spin orbit? It is nothing to do with spin orbit. Instead it is simply the usual Kondo lattice phenomenon.
Question: Where is this in the periodic table of the topological insulators? Yes - it is A1.
Physicists meet for two weeks to discuss innovations and developments in our understanding of strongly correlated electron systems. The first week of the meeting is a school, introducing students to the ideas and new developments in the field. The second week of the meeting is a research workshop.
No comments:
Post a Comment