Spin-orbit coupling effect on quantum Hall ferromagnets with vanishing Zeeman energy
Abstract
We present the phase diagram of a ferromagnetic quantum Hall effect liquid in a narrow quantum well with vanishing single-particle Zeeman splitting, ε Z and pronounced spin-orbit coupling. Upon decreasing ε Z, the spin-polarization field of a liquid takes, first, the easy-axis configuration, followed by the formation of a helical state, which affects the transport and NMR properties of a liquid and the form of topological defects in it. The analysis is extended over high odd integer filling factors.
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