Dipole Interaction in Triplet Superconductivity with Horizontal Line Nodes; Orientation of the Superconducting Order Parameter in Sr2RuO4
arXiv:cond-mat/0306350 · doi:10.1143/JPSJ.72.2456
Abstract
Dipole interaction in the triplet superconductivity is studied. If the Cooper pairs are formed by the electrons at $\mib{r}$ and $\mib{r}+(\pm\frac{a}{2},\pm\frac{a}{2},\pm\frac{c}{2})$ in the body centered tetragonal lattice, (in this case the line nodes run horizontally on the cylindrical Fermi surface), the dipole energy is low when the ${\mib{d}}$-vector is perpendicular to the direction of the angular momentum of the Cooper pairs ($\mib{l}$-vector). This result is in contrast with the dipole energies in the ABM state of superfluid He, where $\mib{d}$-vector is forced to be parallel or antiparallel to the $\mib{l}$-vector by the dipole interaction. The recent NQR experiment in SrRuO by Ishida et al. can be explained by this result.
4 pages
References in corpus (4)
- Microscopic Identification of the D-vector in Triplet Superconductor Sr_2RuO_4
- Superconductivity in SrRuO Mediated by Coulomb Scattering
- Interband Coulomb Interaction and Horizontal Line Nodes in Triplet Superconductor SrRuO
- Coherence peak in the spin susceptibility from nesting in spin-triplet superconductors; A probe for line nodes in SrRuO