The Behavior of a Triplet Superconductor in a Spin Only Magnetic Field

Details The Behavior of a Triplet Superconductor in a Spin Only Magnetic Field The Behavior of a Triplet Superconductor in a Spin Only Magnetic Field

2002-03-05

arxiv.org/abs/cond-mat/0203087v1

Physics

Condensed Matter

Superconductivity

15 pages, 4 figures

Scientific paper

We investigate the order parameter of Sr$_2$RuO$_4$ in an exchange-only magnetic field. A Ginzburg-Landau symmetry analysis implies three possibilities: a pure $^3$He A phase, a $^3$He A$_1$ or a $^3$He A$_2$ phase. We explore the exchange field dependence of the order parameter and energy gap in a one-band model of Sr$_2$RuO$_4$. The numerical solutions show no A$_1$ phase and that the A$_2$ phase is lower in free energy than the A phase. We explore heat capacity as a function of temperature and field strength and find quantitatively different behaviors for the A and A$_2$ phases.

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