Qualitative theory of magnetism and superconductivity of iron superconductors
| Date/Time: | Thursday, 05 Apr 2012 - Thursday, 05 Apr 2012 |
|---|---|
| Location: | PHYSICS Room 5 |
| Phone: | 515-294-5630 |
| Channel: | College of Liberal Arts and Sciences |
| Actions: | Download iCal/vCal | Email Reminder |
I will argue that unusual properties of very popular iron
superconductors can be qualitatively explained if we introduce
non-linear and anharmonic spin fluctuations in their paramagnetic
states. These fluctuations explain the formation of the observed
magnetic ground states of parent compounds, their spin wave excitations
and provide a dominant contribution to the spin-electron coupling,
responsible for the superconductivity.