Gapless Fermi Surfaces in anisotropic multiband superconductors in magnetic field
Superconductivity
2007-05-23 v3 Strongly Correlated Electrons
Abstract
We propose that a new state with a fully gapless Fermi surface appears in quasi-2D multiband superconductors in magnetic field applied parallel to the plane. It is characterized by a paramagnetic moment caused by a finite density of states on the open Fermi surface. We calculate thermodynamic and magnetic properties of the gapless state for both s-wave and d-wave cases, and discuss the details of the 1-st order metamagnetic phase transition that accompanies the appearance of the new phase in s-wave superconductors. We suggest possible experiments to detect this state both in the s-wave (2-H NbSe2) and d-wave (CeCoIn5) superconductors.
Keywords
Cite
@article{arxiv.cond-mat/0610315,
title = {Gapless Fermi Surfaces in anisotropic multiband superconductors in magnetic field},
author = {V. Barzykin and L. P. Gor'kov},
journal= {arXiv preprint arXiv:cond-mat/0610315},
year = {2007}
}
Comments
4 pages, 2 figures