This Wednesday we will have a discussion about the Fe-superconductors. The
plan is to begin by listing some of the experimental facts and then lay out a
list of questions for discussion. I've listed some possible questions below.
Please add to the list if you would like to.
- Should we treat these Fe materials as strongly or weakly coupled,
or are they (again) in an intermediate coupling regime?
- How should we understand the magnetic and structural phase transitions:
J1-J2, Fermi surface nesting, orbitally ordered, ...?
- Is the pairing mechanism in the Fe superconductors the "same" as in the
cuprates? If it is the "same", which "same" is it?
- What is the symmetry of the gap? Can there be nodes? How does the answer
depend upon the material? What does that tell us about the pairing mechanism?
- Can we think of new measurements that pin down the gap structure?
- Does quantum criticality play an important role in these materials?
- What lessons do we learn from the Fe superconductors that can help us in
the search for higher Tc materials? (Elihu Abrahams)