Properties of spin-triplet, even-parity superconductors
Abstract
The physical consequences of the spin-triplet, even-parity pairing that has been predicted to exist in disordered two-dimensional electron systems are considered in detail. We show that the presence of an attractive interaction in the particle-particle spin-triplet channel leads to an instability of the normal metal that competes with the localizing effects of the disorder. The instability is characterized by a diverging length scale, and has all of the characteristics of a continuous phase transition. The transition and the properties of the ordered phase are studied in mean-field theory, and by taking into account Gaussian fluctuations. We find that the ordered phase is indeed a superconductor with an ordinary Meissner effect and a free energy that is lower than that of the normal metal. Various technical points that have given rise to confusion in connection with this and other manifestations of odd-gap superconductivity are also discussed.
Keywords
Cite
@article{arxiv.cond-mat/9812130,
title = {Properties of spin-triplet, even-parity superconductors},
author = {D. Belitz and T. R. Kirkpatrick},
journal= {arXiv preprint arXiv:cond-mat/9812130},
year = {2009}
}
Comments
15 pp., REVTeX, psfig, 2 ps figs, final version as published