Quantum Dynamics of Small-Size Triplet Superconductors with Broken Time-Reversal Symmetry
Superconductivity
2007-05-23 v1
Abstract
Symmetry of the order parameter in some triplet superconductors corresponds to doubly-degenerate chiral states. We predict that in a sufficiently small sample this degeneracy can be lifted via macroscopic quantum tunneling. Moreover, if the initial state is prepared correspondingly, 'instanton'-like quantum behavior is possible in a single-domain sample. In this case coherent oscillations of magnetic momentum should take place, as well as the sign alternations of the boundary currents. In particular, spontaneous Hall-effect recently predicted for ruthenates should posses the oscillating voltage feature.
Cite
@article{arxiv.cond-mat/0207424,
title = {Quantum Dynamics of Small-Size Triplet Superconductors with Broken Time-Reversal Symmetry},
author = {Armen M. Gulian and Kent S. Wood},
journal= {arXiv preprint arXiv:cond-mat/0207424},
year = {2007}
}
Comments
6 pages, 1 figure, submitted to Phys. Rev. Lett