Unconventional sign-changing s-wave pairing symmetry in Fe-based superconductors
| Date/Time: | Monday, 04 Apr 2011 from 4:10 pm to 5:10 pm |
|---|---|
| Location: | Physics, Room 5 |
| Phone: | 515-294-9901 |
| Channel: | College of Liberal Arts and Sciences |
| Categories: | Lectures |
| Actions: | Download iCal/vCal | Email Reminder |
I will first give a general description of the novel Fe-based high temperature superconductors, and will give a short introduction into the spin-fluctuation induced superconductivity. I will review the basic theoretical arguments that led to the so-called $s_pm$ symmetry being predicted well before any experimental indications. Next I will list $negative$ experimental evidence and argue that triplet pairing and d- wave pairing can be with a good degree of confidence excluded. Lastly, I will address the issue of distinguishing between the $s_pm$ and a conventional $s_{++}$ states, in terms of already existing and potential experiments. Finally, I will also discuss the fact that gap nodes seem to exist in some, but not the others, Fe-based superconductors, and possible possible locations and theoretical mechanisms for the gap nodes.
Bio:
http://cst-www.nrl.navy.mil/users/mazin/CV.pdf