Magnetic analogue of the LOFF phase in Sr3Ru2O7

Details Magnetic analogue of the LOFF phase in Sr3Ru2O7 Magnetic analogue of the LOFF phase in Sr3Ru2O7

2009-10-04

arxiv.org/abs/0910.0612v2

Phys. Rev. B 81, 054429 (2010)

Physics

Condensed Matter

Strongly Correlated Electrons

20 pages, 16 figures; revisions to text and figures

Scientific paper

The phase diagram of Sr3Ru2O7 contains a metamagnetic transition that bifurcates to enclose an anomalous phase with intriguing properties - a large resistivity with anisotropy that breaks the crystal-lattice symmetry. We propose that this is a magnetic analogue of the spatially inhomogeneous superconducting Fulde-Ferrell-Larkin-Ovchinnikov state. Based on a microscopic theory of Stoner magnetism we derive a Ginzburg-Landau expansion where the magnetisation transverse to the applied field can become spatially inhomogeneous. We show that this reproduces the observed phase diagram of Sr3Ru2O7.

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