Here are some questions:

1.   Are "unconventional (e.g. no  order parameter) quantum critical points" 
realized in  nature? - beyond the Quantum Hall Effect, that is.

2.  Does the kink in high-Tc ARPES have anything to do with the pairing  
mechanism?

3.  Many questions about YbRh2Si2. All contained in;  How to explain the YbRh2Si2  
phase diagram?