CENTER FOR COMPUTATION & TECHNOLOGY

The interplay of magnetism and superconductivity is an old story with many twists. The latest of these is the discovery superconductivity in Fe-pnictides and chalcogenides. This talk overviews some of the history of the science around this story and presents a discussion of the physical properties of superconductors near magnetism, especially the Fe-based materials, but also ruthenates and some older materials. Some new directions including suppression of magnetism in favor of spin-fluctuations, Fermi surface topology and magnetic reconstruction of the Fermi surface are presented.

This work was supported by the Department of Energy, Basic Energy Sciences, Materials Sciences and Engineering Division.

David Singh is the Group Leader of the Advanced Materials Group in the Materials Science & Technology Division at Oak Ridge National Laboratory.  His objective is to push out at the forefront of science and enable others to do the same.