Helical vortex phase in the non-centrosymmetric CePt_3Si
Abstract
We consider the role of magnetic fields on the broken inversion superconductor CePt_3Si. We show that upper critical field for a field along the c-axis exhibits a much weaker paramagnetic effect than for a field applied perpendicular to the c-axis. The in-plane paramagnetic effect is strongly reduced by the appearance of helical structure in the order parameter. We find that to get good agreement between theory and recent experimental measurements of H_{c2}, this helical structure is required. We propose a Josephson junction experiment that can be used to detect this helical order. In particular, we predict that Josephson current will exhibit a magnetic interference pattern for a magnetic field applied perpendicular to the junction normal. We also discuss unusual magnetic effects associated with the helical order.
Cite
@article{arxiv.cond-mat/0408149,
title = {Helical vortex phase in the non-centrosymmetric CePt_3Si},
author = {R. P. Kaur and D. F. Agterberg and M. Sigrist},
journal= {arXiv preprint arXiv:cond-mat/0408149},
year = {2009}
}
Comments
5 pages, 2 figures, Accepted as Phys Rev. Letter