Unconventional Superconductivity from Local Spin Fluctuations in the Kondo Lattice
Strongly Correlated Electrons
2013-04-15 v2 Superconductivity
Abstract
The explanation of heavy-fermion superconductivity is a long-standing challenge to theory. It is commonly thought to be connected to non-local fluctuations of either spin or charge degrees of freedom and therefore of unconventional type. Here we present results for the Kondo-lattice model, a paradigmatic model to describe heavy-fermion compounds, obtained from dynamical mean-field theory which captures local correlation effects only. Unexpectedly, we find robust s-wave superconductivity in the heavy-fermion state. We argue that this novel type of pairing is tightly connected to the formation of heavy quasiparticle bands and the presence of strong local spin fluctuations.
Keywords
Cite
@article{arxiv.1301.5556,
title = {Unconventional Superconductivity from Local Spin Fluctuations in the Kondo Lattice},
author = {Oliver Bodensiek and Rok Zitko and Matthias Vojta and Mark Jarrell and Thomas Pruschke},
journal= {arXiv preprint arXiv:1301.5556},
year = {2013}
}
Comments
4.5+3 pages, 5+1 figures, supplemental material included