Tandem Pairing in Heavy Fermion Superconductors
Strongly Correlated Electrons
2011-01-07 v3 Superconductivity
Abstract
We examine the internal structure of the heavy fermion condensate, showing that it necessarily involves a d-wave pair of quasiparticles on neighboring lattice sites, condensed in tandem with a composite pair of electrons bound to a local moment, within a single unit cell. These two components draw upon the antiferromagnetic and Kondo interactions to cooperatively enhance the superconducting transition temperature. The tandem condensate is electrostatically active, with a small electric quadrupole moment coupling to strain that is predicted to lead to a superconducting shift in the NQR frequency.
Keywords
Cite
@article{arxiv.0912.2339,
title = {Tandem Pairing in Heavy Fermion Superconductors},
author = {Rebecca Flint and Piers Coleman},
journal= {arXiv preprint arXiv:0912.2339},
year = {2011}
}
Comments
4 pages, 3 figures; revised figures; substantially revised draft, adding discussion of NQR shift.