Vortices with Fractional Flux in Two-Gap Superconductors and in Extended Faddeev Model
Abstract
We discuss linear topological defects allowed in two-gap superconductors and equivalent extended Faddeev model. We show that, in these systems, there exist vortices which carry an arbitrary fraction of magnetic flux quantum. Besides that, we discuss topological defects which do not carry magnetic flux and describe features of ordinary one-magnetic-flux-quantum vortices in the two-gap system. The results could be relevant for the newly discovered two-band superconductor MgB2.
- Publication:
-
Physical Review Letters
- Pub Date:
- July 2002
- DOI:
- 10.1103/PhysRevLett.89.067001
- arXiv:
- arXiv:cond-mat/0111192
- Bibcode:
- 2002PhRvL..89f7001B
- Keywords:
-
- 74.60.-w;
- 11.27.+d;
- 74.76.Db;
- Extended classical solutions;
- cosmic strings domain walls texture;
- Condensed Matter - Superconductivity;
- High Energy Physics - Phenomenology;
- High Energy Physics - Theory
- E-Print:
- v2 references added, v3 journal version, presentation improved. Links to related papers are available at the home page of the author http://www.teorfys.uu.se/PEOPLE/egor