Metallic interfaces between insulating oxides such as STO-LAO or STO-GTO provide a versatile platform to study two dimensional electron liquids. Numerous experiments have observed magnetism and significant spin-orbit effects in such structures. We construct the general free energy governing long-wavelength magnetism in two-dimensional oxide heterostructures, which applies irrespective of the microscopic mechanism for magnetism. This leads, in the relevant regime of weak but non-negligible spin-orbit coupling, to a rich phase diagram containing in-plane ferromagnetic, spiral, cone, and skyrmion lattice phases, as well as a nematic state stabilized by thermal fluctuations.
Xiaopeng Li, W. Vincent Liu, and Leon Balents, "Spirals and skyrmions in two-dimensional oxide heterostructures (Presentation Recording)," Proc. SPIE 9551, Spintronics VIII, 95511B (Presented at SPIE Nanoscience + Engineering: August 11, 2015; Published: 5 October 2015); https://doi.org/10.1117/12.2186150.4519370539001.
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