1112.1112 (Peter Scherpelz et al.)

The nature of condensed and non-condensed pairs in superconductors in
high magnetic fields    [PDF]

Peter Scherpelz, Dan Wulin, K. Levin, A. K. Rajagopal

We address the important question of how to characterize superconductivity at high magnetic fields in the presence of pseudogap effects. Under the assumption that these pseudogap effects are associated with pre-formed pairs, we demonstrate (using a simple extension of Gor'kov theory) how these pairs organize above the transition, Tc into precursors of vortex configurations below Tc, leading to an inhomogeneous normal state. These excited pair states are associated with distortions of the ideal Abrikosov lattice. Our findings should be relevant to high Tc superconductors, and to rapidly rotating atomic Bose and Fermi gases where non-condensed pair effects are clearly present.

View original: http://arxiv.org/abs/1112.1112