Spin triplet superconducting phases in Sr2RuO4 in a magnetic field applied along the c-axis

We investigate the spin-triplet superconducting state of Sr2RuO4 in a magnetic field along the c-axis on the basis of the four-component Ginzburg-Landau (GL) model with a weak spin-orbit coupling. We show that the non-unitary superconducting phase is stabilized near the upper critical field owing to a coupling between the chirality and the magnetic field. The vortex lattice structures of this superconducting phase are calculated at temperatures near the superconducting transition temperature T (c). Furthermore, we show a schematic of the global phase diagram in terms of the temperature and the magnetic field.